Document:

EX-10.2

 Exhibit 10.2 

ZENDESK, INC. 
 2009
STOCK OPTION AND GRANT PLAN 
 Last Amended by Board of Directors: February 13, 2014 

Last Amended by Stockholders: February 13, 2014 
  

	SECTION 1.	GENERAL PURPOSE OF THE PLAN; DEFINITIONS 

 The name of the plan is the Zendesk, Inc. 2009
Stock Option and Grant Plan (the “Plan”). The purpose of the Plan is to encourage and enable the officers, employees, directors, Consultants and other key persons (including prospective employees, but conditioned on their employment) of
Zendesk, Inc., a Delaware corporation (including any successor entity, the “Company”) and any Subsidiary, upon whose judgment, initiative and efforts the Company largely depends for the successful conduct of its business, to acquire a
proprietary interest in the Company. It is anticipated that providing such persons with a direct stake in the Company’s welfare will assure a closer identification of their interests with those of the Company and its stockholders, thereby
stimulating their efforts on the Company’s behalf and strengthening their desire to remain with the Company. 
 The following terms
shall be defined as set forth below: 
 “Affiliate” of any Person means a Person that directly or indirectly, through one
or more intermediaries, controls, is controlled by or is under common control with the first mentioned Person. A Person shall be deemed to control another Person if such first Person possesses directly or indirectly the power to direct, or cause the
direction of, the management and policies of the second Person, whether through the ownership of voting securities, by contract or otherwise. 

“Award” or “Awards,” except where referring to a particular category of grant under the Plan, shall include
Incentive Stock Options, Non-Qualified Stock Options, Restricted Stock Awards, Unrestricted Stock Awards, Restricted Stock Units or any combination of the foregoing. 

“Award Agreement” means a written or electronic agreement setting forth the terms and provisions applicable to an Award
granted under the Plan. Each Award Agreement may contain terms and conditions in addition to those set forth in the Plan; provided, however, that except to the extent explicitly provided to the contrary, in the event of
any conflict in the terms of the Plan and the Award Agreement, the terms of the Plan shall govern. 
 “Bankruptcy” shall
mean (i) the filing of a voluntary petition under any bankruptcy or insolvency law, or a petition for the appointment of a receiver or the making of an assignment for the benefit of creditors, with respect to the Holder, or (ii) the Holder
being subjected involuntarily to such a petition or assignment or to an attachment or other legal or equitable 

 
interest with respect to the Holder’s assets, which involuntary petition or assignment or attachment is not discharged within 60 days after its date, and (iii) the Holder being subject
to a transfer of its Issued Shares or Award(s) by operation of law (including by divorce, even if not insolvent), except by reason of death. 

“Board” means the Board of Directors of the Company. 

“Cause” shall have the meaning as set forth in the Award Agreement(s). In the case that any Award Agreement does not contain
a definition of “Cause,” it shall mean (i) dishonest statements or acts of the grantee with respect to the Company or any Affiliate of the Company, or any of the Company’s current or prospective customers, suppliers vendors or
other third parties with which such entity does business; (ii) the grantee’s commission of (A) a felony or (B) any misdemeanor involving moral turpitude, deceit, dishonesty or fraud; (iii) failure to perform to the
reasonable satisfaction of the Company the grantee’s duties and responsibilities assigned or delegated which failure continues, in the reasonable judgment of the Company, after written notice given to the grantee by the Company; (iv) gross
negligence, willful misconduct or insubordination of the grantee with respect to the Company or any Affiliate of the Company; or (v) a violation of any provision of any agreement(s) between grantee and the Company relating to noncompetition,
nondisclosure and/or assignment of inventions. 
 “Chief Executive Officer” means the Chief Executive Officer of the
Company or, if there is no Chief Executive Officer, then the President of the Company. 
 “Code” means the Internal Revenue
Code of 1986, as amended, and any successor Code, and related rules, regulations and interpretations. 
 “Committee” means
the Committee of the Board referred to in Section 2. 
 “Consultant” means any natural person that provides bona fide
services to the Company (including a Subsidiary), and such services are not in connection with the offer or sale of securities in a capital-raising transaction and do not directly or indirectly promote or maintain a market for the Company’s
securities. 
 “Disability” means “disability” as defined in Section 422(c) of the Code. 

“Effective Date” means the date on which the Plan is approved by stockholders as set forth on the final page of the Plan.

 “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder. 

“Fair Market Value” of the Stock on any given date means the fair market value of the Stock determined in good faith by the
Committee based on the reasonable application of a reasonable valuation method not inconsistent with Section 409A of the Code. If the Stock is admitted to quotation on a national securities exchange, the determination shall be made by reference
to market quotations. If the date for which Fair Market Value is determined is the first day when trading prices for the Stock are reported on a national securities exchange, the Fair 

  
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Market Value shall be the “Price to the Public” (or equivalent) set forth on the cover page for the final prospectus relating to the Company’s Initial Public Offering. 

“Good Reason” shall have the meaning as set forth in the Award Agreement(s). In the case that any Award Agreement does not
contain a definition of “Good Reason,” it shall mean (i) a material diminution in the grantee’s base salary except for across-the-board salary reductions based on the Company’s financial performance similarly affecting all
or substantially all senior management employees of the Company or (ii) a change of more than 50 miles in the geographic location at which the grantee provides services to the Company. 

“Grant Date” means the date that the Committee designates in its approval of an Award in accordance with applicable law,
which date may not precede the date of such Committee approval. 
 “Holder” means, with respect to an Award or any Issued
Shares, the Person holding such Award or Issued Shares, including the initial recipient of the Award or any Permitted Transferee. 

“Incentive Stock Option” means any Stock Option designated and qualified as an “incentive stock option” as defined
in Section 422 of the Code. 
 “Initial Public Offering” means the consummation of the first fully underwritten, firm
commitment public offering pursuant to an effective registration statement under the Securities Act covering the offer and sale by the Company of its equity securities, as a result of or following which the Stock shall be publicly held. 

“Issued Shares” means, collectively, all outstanding Shares issued pursuant to Restricted Stock Awards, Unrestricted Stock
Awards and Restricted Stock Units and all Option Shares. 
 “NASDAQ” means the NASDAQ Stock Market LLC. 

“Non-Qualified Stock Option” means any Stock Option that is not an Incentive Stock Option. 

“Option” or “Stock Option” means any option to purchase shares of Stock granted pursuant to Section 5.

 “Option Shares” means outstanding shares of Stock that were issued to a Holder upon the exercise of a Stock Option. 

“Permitted Transferees” shall mean any of the following to whom a Holder may transfer Issued Shares hereunder (as set forth
in Section 9(a)(ii)(A)): the Holder’s child, stepchild, grandchild, parent, stepparent, grandparent, spouse, former spouse, sibling, niece, nephew, mother-in-law, father-in-law, son-in-law, daughter-in-law, brother-in-law, or
sister-in-law, including adoptive relationships, any person sharing the Holder’s household (other than a tenant or employee), a trust in which these persons have more than fifty percent of the beneficial interest, a foundation in which these
persons control the management of assets, and any other entity in which these persons own more than fifty percent of the voting interests; provided, however, that any such trust does not require or permit
distribution of any Issued Shares during 

  
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the term of the Award Agreement unless subject to its terms. Upon the death of the Holder, the term Permitted Transferees shall also include such deceased Holder’s estate, executions,
administrations, personal representations, heirs, legatees and distributees, as the case may be. 
 “Person” shall mean any
individual, corporation, partnership (limited or general), limited liability company, limited liability partnership, association, trust, joint venture, unincorporated organization or any similar entity. 

“Repurchase Event” means (i) a Sale Event or (ii) the Holder’s Bankruptcy. 

“Restricted Stock Award” means Awards granted pursuant to Section 6 and “Restricted Stock” means Shares
granted pursuant to such Awards. 
 “Restricted Stock Unit” means an Award of phantom stock units to a grantee, which may
be settled in cash or stock as determined by the Committee, pursuant to Section 8. 
 “Sale Event” means the consummation
of (i) the dissolution or liquidation of the Company, (ii) the sale of all or substantially all of the assets of the Company on a consolidated basis to an unrelated person or entity, (iii) a merger, reorganization or consolidation
involving the Company in which the shares of capital stock outstanding immediately prior to such transaction represent or are converted into or exchanged for securities of the surviving or resulting entity immediately upon completion of such
transaction which represent less than 50% of the outstanding voting power of such surviving or resulting entity, (iv) the acquisition of all or a majority of the outstanding capital stock of the Company in a single transaction or a series of
related transactions by a Person or group of Persons, or (v) any other acquisition of the business of the Company, as determined by the Board; provided, however, that the Company’s Initial Public Offering, any
subsequent public offering or another capital raising event, or a merger effected solely to change the Company’s domicile shall not constitute a “Sale Event.” 

“Section 409A” means Section 409A of the Code and the regulations and other guidance promulgated thereunder. 

“Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations thereunder. 

“Series A Common Stock” means the Series A Common Stock, par value $0.01 per share, of the Company, subject to adjustments
pursuant to Section 3. 
 “Series B Common Stock” means the Series B Common Stock, $0.01 par value per share, of the
Company, subject to adjustments pursuant to Section 3. 
 “Service Relationship” means any relationship as an
employee, part-time employee, director or other key person (including consultants) of the Company or any Subsidiary or any successor entity such that, for example, a Service Relationship shall be deemed to continue without interruption in the event
an individual’s status changes from full-time employee to part-time employee or consultant. 
 “Shares” means shares
of Stock. 

  
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 “Stock” means either the Series A Common Stock or the Series B Common Stock,
subject to adjustments pursuant to Section 3. 
 “Subsidiary” means any corporation or other entity (other than the
Company) in which the Company has more than a 50 percent interest, either directly or indirectly. 
 “Ten Percent Owner”
means an employee who owns or is deemed to own (by reason of the attribution rules of Section 424(d) of the Code) more than 10 percent of the combined voting power of all classes of stock of the Company or any parent of the Company or any
Subsidiary. 
 “Termination Event” means the termination of the Award recipient’s Service Relationship with the
Company and its Subsidiaries for any reason whatsoever, regardless of the circumstances thereof, and including, without limitation, upon death, disability, retirement, discharge or resignation for any reason, whether voluntarily or involuntarily.
The following shall not constitute a Termination Event: (i) a transfer to the service of the Company from a Subsidiary or from the Company to a Subsidiary, or from one Subsidiary to another Subsidiary or (ii) an approved leave of absence
for military service or sickness, or for any other purpose approved by the Committee, if the individual’s right to re-employment is guaranteed either by a statute or by contract or under the policy pursuant to which the leave of absence was
granted or if the Committee otherwise so provides in writing. 
 “Unrestricted Stock Award” means any Award granted
pursuant to Section 7 and “Unrestricted Stock” means Shares granted pursuant to such Awards. 
  

	SECTION 2.	ADMINISTRATION OF PLAN; COMMITTEE AUTHORITY TO SELECT GRANTEES AND DETERMINE AWARDS 

 (a)
Administration of Plan. The Plan shall be administered by the Board, or at the discretion of the Board, by a committee of the Board, comprised, except as contemplated by Section 2(c), of not less than two Directors. All references herein
to the “Committee” shall be deemed to refer to the group then responsible for administration of the Plan at the relevant time (i.e., either the Board of Directors or a committee or committees of the Board, as applicable). 

(b) Powers of Committee. The Committee shall have the power and authority to grant Awards consistent with the terms of the Plan,
including the power and authority: 
 (i) to select the individuals to whom Awards may from time to time be granted; 

(ii) to determine the time or times of grant, and the amount, if any, of Incentive Stock Options,
Non-Qualified Stock Options, Restricted Stock Awards, Unrestricted Stock Awards, Restricted Stock Units, or any combination of the foregoing, granted to any one or more grantees; 

(iii) to determine the series of Stock and the number of shares of Stock to be covered by any Award and, subject to the provisions of
Section 5(a)(i) below, the price, exercise price, conversion ratio or other price relating thereto; provided, however, that any grant of Series A Common Stock shall require the approval of the Board; 

  
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 (iv) to determine and, subject to Section 13, to modify from time to time the terms and
conditions, including restrictions, not inconsistent with the terms of the Plan, of any Award, which terms and conditions may differ among individual Awards and grantees, and to approve the form of Award Agreements; 

(v) to accelerate at any time the exercisability or vesting of all or any portion of any Award; 

(vi) to impose any limitations on Awards granted under the Plan, including limitations on transfers, repurchase provisions and the like, and
to exercise repurchase rights or obligations; 
 (vii) subject to any restrictions imposed by Section 409A, to extend at any time the
period in which Stock Options may be exercised; and 
 (viii) at any time to adopt, alter and repeal such rules, guidelines and practices
for administration of the Plan and for its own acts and proceedings as it shall deem advisable; to interpret the terms and provisions of the Plan and any Award (including related written instruments); to make all determinations it deems advisable
for the administration of the Plan; to decide all disputes arising in connection with the Plan; and to otherwise supervise the administration of the Plan. 

All decisions and interpretations of the Committee shall be binding on all persons, including the Company and Plan grantees. 

(c) Delegation of Authority to Grant Options. Subject to applicable law, the Committee, in its discretion, may delegate to the Chief
Executive Officer of the Company the power to designate officers or employees to be recipients of Options of Series B Common Stock, and to determine the number of such Options of Series B Common Stock to be received by such officers or employees;
provided, however, that the resolution so authorizing the Chief Executive Officer shall specify the total number of Options of Series B Common Stock the Chief Executive Officer may so award and may not delegate to the Chief Executive
Officer the authority to set the strike price or the vesting terms of such Options. Any such delegation by the Committee shall also provide that the Chief Executive Officer may not grant awards to himself or herself (or other members of senior
management) without the approval of the Committee. The Committee may revoke or amend the terms of a delegation at any time but such action shall not invalidate any prior actions of the Committee’s delegate or delegates that were consistent with
the terms of the Plan. 
 (d) Award Agreement. Awards under the Plan shall be evidenced by Award Agreements that set forth the terms,
conditions and limitations for each Award and may include, without limitation, the term of an Award, the provisions applicable in the event the Service Relationship terminates, and the Company’s authority to unilaterally or bilaterally amend,
modify, suspend, cancel or rescind an Award. To the extent permitted by the Committee, Award Agreements may be executed electronically by the Award recipient. 

(e) Indemnification. Neither the Board nor the Committee, nor any member of either or any delegate thereof, shall be liable for any
act, omission, interpretation, construction or 

  
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determination made in good faith in connection with the Plan, and the members of the Board and the Committee (and any delegate thereof) shall be entitled in all cases to indemnification and
reimbursement by the Company in respect of any claim, loss, damage or expense (including, without limitation, reasonable attorneys’ fees) arising or resulting therefrom to the fullest extent permitted by law and/or under the Company’s
governing documents, including its certificate of incorporation or bylaws, or any directors’ and officers’ liability insurance coverage which may be in effect from time to time and/or any indemnification agreement between such individual
and the Company. 
 (f) Foreign Award Recipients. Notwithstanding any provision of the Plan to the contrary, in order to comply with
the laws in other countries in which the Company and any Subsidiary operate or have employees or other individuals eligible for Awards, the Committee, in its sole discretion, shall have the power and authority to: (i) determine which
Subsidiaries, if any, shall be covered by the Plan; (ii) determine which individuals, if any, outside the United States are eligible to participate in the Plan; (iii) modify the terms and conditions of any Award granted to individuals
outside the United States to comply with applicable foreign laws; (iv) establish subplans and modify exercise procedures and other terms and procedures, to the extent the Committee determines such actions to be necessary or advisable (and such
subplans and/or modifications shall be attached to the Plan as appendices); provided, however, that no such subplans and/or modifications shall increase the share limitation contained in Section 3(a) hereof; and (v) take any
action, before or after an Award is made, that the Committee determines to be necessary or advisable to obtain approval or comply with any local governmental regulatory exemptions or approvals. Notwithstanding the foregoing, the Committee may not
take any actions hereunder, and no Awards shall be granted, that would violate the Exchange Act or any other applicable United States securities law, the Code, or any other applicable United States governing statute or law. 

 

	SECTION 3.	STOCK ISSUABLE UNDER THE PLAN; MERGERS AND OTHER TRANSACTIONS; SUBSTITUTION 

 (a)
Stock Issuable. The maximum number of shares of Stock reserved and available for issuance under the Plan, subject to adjustment as provided in Section 3(b), shall be (i) up to 49,530,320 shares of Series A Common Stock and
(ii) up to 49,530,320 shares of Series B Common Stock; provided, however, that the maximum aggregate number of shares authorized for issuance under the Plan shall not exceed 49,530,320 shares. For purposes of this limitation, the
shares of Stock underlying any Awards that are forfeited, canceled, withheld upon exercise of an Option or settlement of an Award to cover the exercise price or tax withholding, reacquired by the Company prior to vesting, satisfied without the
issuance of Stock or otherwise terminated (other than by exercise), in each case shall be added back to the shares of Stock available for issuance under the Plan. Subject to such overall limitations, shares of Stock may be issued up to such maximum
number pursuant to any type or types of Award, provided that no more than 60,000,000 shares may be issued pursuant to Incentive Stock Options. The shares available for issuance under the Plan may be authorized but unissued shares of Stock or shares
of Stock reacquired by the Company. Beginning on the date that the Company becomes subject to Section 162(m) of the Code, no more than 10,000,000 Options shall be granted to any one individual in any calendar year period. 

  
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 (b) Changes in Stock. Subject to Section 3(c) hereof, if, as a result of any
reorganization, recapitalization, reclassification, combination, stock dividend, stock split, reverse stock split or other similar change in the Company’s capital stock, the outstanding shares of Stock are increased or decreased or are
exchanged for a different number or kind of shares or other securities of the Company, or additional shares or new or different shares or other securities of the Company or other non-cash assets are distributed with respect to such shares of Stock
or other securities, or, if, as a result of any merger or consolidation, or sale of all or substantially all of the assets of the Company, the outstanding shares of Stock are converted into or exchanged for securities of the Company or any successor
entity (or a parent or subsidiary thereof), the Committee shall make an appropriate and equitable or proportionate adjustment in (i) the maximum number of shares reserved for issuance under the Plan, (ii) the number and kind of shares or
other securities subject to any then outstanding Awards under the Plan, (iii) the repurchase price, if any, per share subject to each outstanding Award, and (iv) the exercise price for each share subject to any then outstanding Stock
Options under the Plan, without changing the aggregate exercise price (i.e., the exercise price multiplied by the number of Stock Options) as to which such Stock Options remain exercisable. The Committee shall also make equitable or proportionate
adjustments in the number of shares subject to outstanding Awards and the exercise price and the terms of outstanding Awards to take into consideration cash dividends paid other than in the ordinary course or any other extraordinary corporate event.
The adjustment by the Committee shall be final, binding and conclusive. No fractional shares of Stock shall be issued under the Plan resulting from any such adjustment, but the Committee in its discretion may make a cash payment in lieu of
fractional shares. 
 (c) Sale Events. 

(i) Options. 

(A) In the case of and subject to the consummation of a Sale Event, the Plan and all Options issued hereunder shall terminate
upon the effective time of any such Sale Event unless provision is made in connection with the Sale Event for the assumption or continuation of Options theretofore granted by the successor entity, or the substitution of such Options with new Options
of the successor entity or parent thereof, with an equitable or proportionate adjustment as to the number and kind of shares and, if appropriate, the per share exercise prices, as such parties shall agree (after taking into account any acceleration
hereunder and/or pursuant to the terms of any Award Agreement). 
 (B) In the event of the termination of the Plan and all
Options issued hereunder pursuant to Section 3(c), each Holder of Options shall be permitted, within a specified period of time prior to the consummation of the Sale Event as determined by the Committee, to exercise all such Options which are
then exercisable or will become exercisable as of the effective time of the Sale Event; provided, however, that the exercise of Options not exercisable prior to the Sale Event shall be subject to the consummation of the Sale
Event. 
 (C) Notwithstanding anything to the contrary in Section 3(c)(i)(A), in the event of a Sale Event, the Company
shall have the right, but not the obligation, to 

  
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make or provide for a cash payment to the grantees holding Options in exchange for the cancellation thereof, in an amount equal to the difference between (A) the value as determined by the
Committee of the consideration payable per share of Stock pursuant to the Sale Event (the “Sale Price”) times the number of shares of Stock subject to outstanding Options (to the extent then vested exercisable, including by reason of
acceleration in connection with such Sale Event, at prices not in excess of the Sale Price) and (B) the aggregate exercise price of all such outstanding vested Options. 

(ii) Option Shares. Unless otherwise provided in an Award Agreement, in the case of and subject to the consummation of a Sale Event,
Option Shares shall be subject to the repurchase right set forth in Section 9(c)(i). 
 (iii) Restricted Stock and Restricted Stock
Unit Awards. 
 (A) In the case of and subject to the consummation of a Sale Event, all Restricted Stock and Restricted
Stock Unit Awards issued hereunder shall terminate upon the effective time of any such Sale Event unless provision is made in connection with the Sale Event for the assumption or continuation of such Awards by the successor entity, or the
substitution of such Awards with new Awards of the successor entity or parent thereof, with an equitable or proportionate adjustment as to the number and kind of shares subject to such Awards as such parties shall agree (after taking into account
any acceleration hereunder and/or pursuant to the terms of any Award Agreement). 
 (B) In the event of the termination of
shares of Restricted Stock issued hereunder pursuant to Section 3(c), such shares of Restricted Stock shall be subject to the repurchase right set forth in Section 9(c)(2). 

(C) Notwithstanding anything to the contrary in Section 3(c)(iii)(A), in the event of a Sale Event, the Company shall have
the right, but not the obligation, to make or provide for a cash payment to the grantees holding Restricted Stock or Restricted Stock Unit Awards in exchange for the cancellation thereof, in an amount equal to the Sale Price times the number of
shares of Stock subject to such Awards, to be paid at the time of such Sale Event or upon the later vesting of such Awards. 
 (iv)
Unrestricted Stock Awards. Unless otherwise provided in an Award Agreement, any shares of Unrestricted Stock shall be treated in a Sale Event the same as all other Shares then outstanding. 

 

	SECTION 4.	ELIGIBILITY 

 Grantees under the Plan will be such full or part-time officers and other
employees, directors, Consultants and key persons (including prospective employees, but conditioned on their employment) of the Company and any Subsidiary who are selected from time to time by the Committee in its sole discretion; provided,
however, that an Incentive Stock Option may be granted only to a person who, at the time the Incentive Stock Option is granted, is an employee of the Company or any Subsidiary. 

  
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	SECTION 5.	STOCK OPTIONS 

 The grant of a Stock Option is contingent on the grantee executing a
Stock Option Award Agreement. The terms and conditions of each such Stock Option Award Agreement shall be determined by the Committee, and such terms and conditions may differ among individual Awards and grantees, all of whom must be eligible
persons under Section 4 hereof. 
 Stock Options granted under the Plan may be either Incentive Stock Options or Non-Qualified Stock
Options. Incentive Stock Options may be granted only to employees of the Company or any Subsidiary that is a “subsidiary corporation” within the meaning of Section 424(f) of the Code. To the extent that any Option does not qualify as
an Incentive Stock Option, it shall be deemed a Non-Qualified Stock Option. 
 No Incentive Stock Option shall be granted under the Plan
after the date which is ten years from the date the Plan is approved by the Board. 
 (a) Terms of Stock Options. The Committee in
its discretion may grant Stock Options to eligible officers, employees, directors, Consultants and key persons of the Company or any Subsidiary. Stock Options granted pursuant to this Section 5(a) shall be subject to the following terms and
conditions and shall contain such additional terms and conditions, not inconsistent with the terms of the Plan, as the Committee shall deem desirable. If the Committee so determines, Stock Options may be granted in lieu of cash compensation at the
optionee’s election, subject to such terms and conditions as the Committee may establish. 
 (i) Exercise Price. The exercise
price per share for the Stock covered by a Stock Option granted pursuant to Section 5(a) shall be determined by the Committee at the time of grant but shall not be less than 100 percent of the Fair Market Value on the Grant Date. In the case of
an Incentive Stock Option that is granted to a Ten Percent Owner, the option price of such Incentive Stock Option shall not be less than 110 percent of the Fair Market Value on the Grant Date. 

(ii) Option Term. The term of each Stock Option shall be fixed by the Committee, but no Stock Option shall be exercisable more than ten
years after the date the Stock Option is granted. In the case of an Incentive Stock Option that is granted to a Ten Percent Owner, the term of such Stock Option shall be no more than five years from the Grant Date. 

(iii) Exercisability; Rights of a Stockholder. Stock Options shall become exercisable and/or vested at such time or times, whether or
not in installments, as shall be determined by the Committee at or after the Grant Date. The Award Agreement may permit an optionee to exercise all or a portion of a Stock Option immediately at grant; provided that the Option Shares issued
upon such exercise shall be subject to restrictions and a vesting schedule identical to the vesting schedule of the related Stock Option and the optionee shall be required to enter into a Restricted Stock Award Agreement and any other similar
documentation required by the Company as a condition to exercise of such Stock Option; provided further that, in the case of an Award Agreement granting a Stock Option to purchase Series A Common Stock, such Award Agreement may only
permit an optionee to exercise such Stock Option immediately at grant if such early exercise is explicitly approved by the Board. An optionee shall have the 

  
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rights of a stockholder only as to shares acquired upon the exercise of a Stock Option and not as to unexercised Stock Options. An optionee shall not be deemed to have acquired any such shares
unless and until a Stock Option shall have been exercised pursuant to the terms hereof and the optionee’s name shall have been entered on the books of the Company as a stockholder. 

(iv) Method of Exercise. Stock Options may be exercised by an optionee in whole or in part, by the optionee giving written notice of
exercise to the Company, specifying the number of shares to be purchased. Payment of the purchase price may be made by one or more of the following methods (or any combination thereof) to the extent provided in the Option Award Agreement: 

(A) In cash, by certified or bank check, by wire transfer of immediately available funds, or other instrument acceptable to the
Committee; 
 (B) If permitted by the Committee, by the optionee delivering to the Company a promissory note, if the Board
has expressly authorized the loan of funds to the optionee for the purpose of enabling or assisting the optionee to effect the exercise of his or her Stock Option; provided, that at least so much of the exercise price as represents the par
value of the Stock shall be paid other than with a promissory note if required by state law; 
 (C) If permitted by the
Committee and the Initial Public Offering has occurred (or the Stock otherwise becomes publicly traded), through the delivery (or attestation to the ownership) of shares of Stock that have been purchased by the optionee on the open market or that
are beneficially owned by the optionee and are not then subject to restrictions under any Company plan. To the extent required to avoid variable accounting treatment under FAS 123R or other applicable accounting rules, such surrendered shares if
originally purchased from the Company shall have been owned by the optionee for at least six months. Such surrendered shares shall be valued at Fair Market Value on the exercise date; 

(D) If permitted by the Committee and the Initial Public Offering has occurred (or the Stock otherwise becomes publicly
traded), by the optionee delivering to the Company a properly executed exercise notice together with irrevocable instructions to a broker to promptly deliver to the Company cash or a check payable and acceptable to the Company for the purchase
price; provided that in the event the optionee chooses to pay the purchase price as so provided, the optionee and the broker shall comply with such procedures and enter into such agreements of indemnity and other agreements as the Committee
shall prescribe as a condition of such payment procedure; and 
 (E) If permitted by the Committee with respect to Stock
Options that are not Incentive Stock Options, by a “net exercise” arrangement pursuant to which the Company will reduce the number of shares of Stock issuable upon exercise by the largest whole number of shares with a Fair Market Value
that does not exceed the aggregate exercise price. 

  
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 Payment instruments will be received subject to collection. No certificates for shares of Stock
so purchased will be issued to the optionee or, with respect to uncertificated Stock, no transfer to the optionee on the records of the Company will take place, until the Company has completed all steps required by law to be taken in connection with
the issuance and sale of the shares, including without limitation (i) receipt of a representation from the optionee at the time of exercise of the Option that the optionee is purchasing the shares for the optionee’s own account and not
with a view to any sale or distribution thereof, (ii) the legending of any certificate (or notation on any book entry) representing the shares to evidence the foregoing restrictions, and (iii) obtaining from optionee payment or provision
for all withholding taxes due as a result of the exercise of the Option. The delivery of certificates representing the shares of Stock (or the transfer to the optionee on the records of the Company with respect to uncertificated Stock) to be
purchased pursuant to the exercise of a Stock Option will be contingent upon receipt from the optionee (or a purchaser acting in his or her stead in accordance with the provisions of the Stock Option) by the Company of the full purchase price for
such shares and the fulfillment of any other requirements contained in the Option Award Agreement or applicable provisions of laws. In the event an optionee chooses to pay the purchase price by previously-owned shares of Stock through the
attestation method, the number of shares of Stock transferred to the optionee upon the exercise of the Stock Option shall be net of the number of shares attested to. 

(b) Annual Limit on Incentive Stock Options. To the extent required for “incentive stock option” treatment under
Section 422 of the Code, the aggregate Fair Market Value (determined as of the time of grant) of the shares of Stock with respect to which Incentive Stock Options granted under the Plan and any other plan of the Company or its parent and any
Subsidiary that become exercisable for the first time by an optionee during any calendar year shall not exceed $100,000 or such other limit as may be in effect from time to time under Section 422 of the Code. To the extent that any Stock Option
exceeds this limit, it shall constitute a Non-Qualified Stock Option. 
 (c) Termination of the Service Relationship. In the event
that an optionee’s Service Relationship terminates, such optionee may thereafter exercise his, her or its Stock Option, to the extent that it was vested and exercisable on the date of such termination, until the date specified below. Any
portion of the Stock Option that is not exercisable on the date of termination of such Service Relationship shall immediately expire and be null and void. Once any portion of the Stock Option becomes vested and exercisable, the optionee’s right
to exercise such portion of the Stock Option (or the optionee’s representatives and legatees as applicable) in the event of a termination of the optionee’s Service Relationship shall continue until the earliest of: (i) the date which
is: (A) six months following the date on which the optionee’s Service Relationship terminates due to death or Disability (or such longer period of time as determined by the Committee and set forth in the applicable Option Agreement), or
(B) 30 days following the date on which the optionee’s Service Relationship terminates if the termination is due to any other reason (or such longer period of time as determined by the Committee and set forth in the applicable Option
Agreement), or (ii) the Expiration Date set forth in the Option Agreement; provided that notwithstanding the foregoing, an Option Agreement may provide that if the optionee’s Service Relationship is terminated for Cause, the Stock
Option shall terminate immediately and be null and void upon the date of the optionee’s termination and shall not thereafter be exercisable. 

  
 12 

	SECTION 6.	RESTRICTED STOCK AWARDS 

 (a) Nature of Restricted Stock Awards. The Committee
may, in its sole discretion, grant (or sell at par value or such higher purchase price determined by the Committee) to an eligible person under Section 4 hereof a Restricted Stock Award under the Plan. The Committee shall determine the
restrictions and conditions applicable to each Restricted Stock Award at the time of grant. Conditions may be based on continuing employment (or other Service Relationship), achievement of pre-established performance goals and objectives and/or such
other criteria as the Committee may determine. The grant of a Restricted Stock Award is contingent on the grantee executing a Restricted Stock Award Agreement. The terms and conditions of each such Award Agreement shall be determined by the
Committee, and such terms and conditions may differ among individual Awards and grantees, all of whom must be eligible persons under Section 4 hereof. 

(b) Rights as a Stockholder. Upon execution of a Restricted Stock Award Agreement and payment of any applicable purchase price, a
grantee of Restricted Stock shall be considered the record owner of and shall be entitled to vote the Shares of Restricted Stock if, and to the extent, such Shares are entitled to voting rights, subject to such conditions contained in the Restricted
Stock Award Agreement. The grantee shall be entitled to receive all dividends and any other distributions declared on the Shares; provided, however, that the Company is under no duty to declare any such dividends or to make any such
distribution. The Restricted Stock Award Agreement may require or permit the immediate payment, waiver, deferral or investment of dividends paid on the Restricted Stock. Unless the Committee shall otherwise determine, certificates evidencing the
Restricted Stock shall remain in the possession of the Company until such Restricted Stock is vested as provided in subsection (d) below of this Section, and the grantee shall be required, as a condition of the grant, to deliver to the Company
a stock power endorsed in blank and such other instruments of transfer as the Committee may prescribe. 
 (c) Restrictions.
Restricted Stock may not be sold, assigned, transferred, pledged or otherwise encumbered or disposed of except as specifically provided herein or in the Restricted Stock Award Agreement. Except as may otherwise be provided by the Committee either in
the Award Agreement or, subject to Section 13 below, in writing after the Award Agreement is issued, if any, if a grantee’s employment (or other Service Relationship) with the Company and any Subsidiary terminates, the Company or its
assigns shall have the right, as may be specified in the relevant instrument, to repurchase some or all of the Shares subject to the Award at such purchase price as is set forth in the Restricted Stock Award Agreement or Section 9(c)(ii) of the
Plan. 
 (d) Vesting of Restricted Stock. The Committee at the time of grant shall specify the date or dates and/or the attainment of
pre-established performance goals, objectives and other conditions on which the substantial risk of forfeiture imposed shall lapse and the Restricted Stock shall become vested, subject to such further rights
of the Company or its assigns as may be specified in the Restricted Stock Award Agreement. 

  
 13 

	SECTION 7.	UNRESTRICTED STOCK AWARDS 

 (a) Grant or Sale of Unrestricted Stock. The Committee
may, in its sole discretion, grant (or sell at par value or such higher purchase price determined by the Committee) to an eligible person under Section 4 hereof an Unrestricted Stock Award under the Plan. Unrestricted Stock Awards may be
granted in respect of past services or other valid consideration, or in lieu of cash compensation due to such grantee. 
 (b) Elections
to Receive Unrestricted Stock In Lieu of Compensation. Upon the request of an eligible person under Section 4 hereof and with the consent of the Committee, each such grantee may, pursuant to an advance written election delivered to the
Company no later than the date specified by the Committee, receive a portion of any cash compensation otherwise due to such grantee in the form of shares of Unrestricted Stock. 

 

	SECTION 8.	RESTRICTED STOCK UNITS  

 (a) Nature of Restricted Stock Units. The Committee
shall determine the restrictions and conditions applicable to each Restricted Stock Unit at the time of grant. Vesting conditions may be based on continuing employment (or other Service Relationship), achievement of pre-established performance goals
and objectives and/or other such criteria as the Committee may determine. The grant of Restricted Stock Unit(s) is contingent on the grantee executing a Restricted Stock Unit Award Agreement. The terms and conditions of each such Award Agreement
shall be determined by the Committee and may differ among individual Awards and grantees. On or promptly following the vesting date or dates applicable to any Restricted Stock Unit, such Restricted Stock Unit(s) shall be settled in the form of cash
or shares of Stock, as specified in the Award Agreement. 
 (b) Rights as a Stockholder. A grantee shall have the rights of a
stockholder only as to shares of Stock, if any, acquired upon settlement of a Restricted Stock Unit. A grantee shall not be deemed to have acquired any such shares unless and until a Restricted Stock Unit shall have been settled in Stock pursuant to
the terms hereof, the Company shall have issued and delivered a certificate representing the shares to the grantee, and the grantee’s name shall have been entered in the books of the Company as a stockholder. 

(c) Termination. Except as may otherwise be provided by the Committee either in the Award Agreement or in writing after the Award
Agreement is issued, a grantee’s right in all Restricted Stock Units that have not vested shall automatically terminate upon the grantee’s termination of employment (or cessation of Service Relationship) with the Company and any Subsidiary
for any reason. 
  

	SECTION 9.	TRANSFER RESTRICTIONS; COMPANY RIGHT OF FIRST REFUSAL; COMPANY REPURCHASE RIGHTS 

 (a)
Restrictions on Transfer. 
 (i) Non-Transferability of Stock Options. No Stock Option shall be transferable by the optionee
otherwise than by will or by the laws of descent and distribution and all Stock Options shall be exercisable, during the optionee’s lifetime, only by the optionee, or by 

  
 14 

 
the optionee’s legal representative or guardian in the event of the optionee’s incapacity. Notwithstanding the foregoing, the Committee, in its sole discretion, may provide in the Award
Agreement regarding a given Stock Option that the optionee may transfer, without consideration for the transfer, his or her Non-Qualified Stock Options to members of his or her immediate family, to trusts for
the benefit of such family members, or to partnerships in which such family members are the only partners, provided that the transferee agrees in writing with the Company to be bound by all of the terms and conditions of this Plan and the applicable
Option. 
 (ii) Issued Shares. No Issued Shares shall be sold, assigned, transferred, pledged, hypothecated, given away or in any
other manner disposed of or encumbered, whether voluntarily or by operation of law, unless (i) such transfer is in compliance with the terms of the applicable Award Agreement, all applicable securities laws (including, without limitation, the
Securities Act), and with the terms and conditions of this Section 9, (ii) such transfer does not cause the Company to become subject to the reporting requirements of the Exchange Act, and (iii) the transferee consents in writing to
be bound by the provisions of the Plan, including this Section 9. In connection with any proposed transfer, the Committee may require the transferor to provide at the transferor’s own expense an opinion of counsel to the transferor,
satisfactory to the Committee, that such transfer is in compliance with all foreign, federal and state securities laws (including, without limitation, the Securities Act). Any attempted disposition of Issued Shares not in accordance with the terms
and conditions of this Section 9 shall be null and void, and the Company shall not reflect on its records any change in record ownership of any Issued Shares as a result of any such disposition, shall otherwise refuse to recognize any such
disposition and shall not in any way give effect to any such disposition of Issued Shares. Subject to the foregoing general provisions, and unless otherwise provided in the applicable Award Agreement, Issued Shares may be transferred pursuant to the
following specific terms and conditions (provided that with respect to any transfer of Restricted Stock, all vesting and forfeiture provisions shall continue to apply only with respect to the original recipient): 

(A) Transfers to Permitted Transferees. The Holder may sell, assign, transfer or give away any or all of the Issued
Shares to Permitted Transferees; provided, however, that following such sale, assignment, or other transfer, such Issued Shares shall continue to be subject to the terms of this Plan (including this Section 9) and such
Permitted Transferee(s) shall, as a condition to any such transfer, deliver a written acknowledgment to that effect to the Company. 

(B) Transfers Upon Death. Upon the death of the Holder, any Issued Shares then held by the Holder at the time of such
death and any Issued Shares acquired thereafter by the Holder’s legal representative shall be subject to the provisions of this Plan, and the Holder’s estate, executors, administrators, personal representatives, heirs, legatees and
distributees shall be obligated to convey such Issued Shares to the Company or its assigns under the terms contemplated hereby. 
 (b)
Right of First Refusal. In the event that a Holder desires at any time to sell or otherwise transfer all or any part of such Holder’s Issued Shares (other than shares of Restricted Stock which by their terms are not transferable), the
Holder first shall give written notice to the Company of the Holder’s intention to make such transfer. Such notice shall state the number of Issued Shares which the Holder proposes to sell (the “Offered Shares”), the price and the
terms 

  
 15 

 
at which the proposed sale is to be made and the name and address of the proposed transferee. At any time within 30 days after the receipt of such notice by the Company, the Company or its
assigns may elect to purchase all or any portion of the Offered Shares at the price and on the terms offered by the proposed transferee and specified in the notice. The Company or its assigns shall exercise this right by mailing or delivering
written notice to the Holder within the foregoing 30-day period. If the Company or its assigns elect to exercise its purchase rights under this Section 9(b), the closing for such purchase shall, in any event, take place within 45 days after the
receipt by the Company of the initial notice from the Holder. In the event that the Company or its assigns do not elect to exercise such purchase right, or in the event that the Company or its assigns do not pay the full purchase price within such
45-day period, the Holder may, within 60 days thereafter, sell the Offered Shares to the proposed transferee and at the same price and on the same terms as specified in the Holder’s notice. Any Shares purchased by such proposed transferee shall
no longer be subject to the terms of the Plan. Any Shares not sold to the proposed transferee shall remain subject to the Plan. 
 (c)
Company’s Right of Repurchase. 
 (i) Right of Repurchase for Option Shares. The Company or its assigns shall have the
right and option upon a Repurchase Event to repurchase from a Holder of Option Shares some or all (as determined by the Company) of the Option Shares held or subsequently acquired upon exercise of a Stock Option by such Holder at the price per share
specified below. Such repurchase right may be exercised by the Company within the later of (A) six months following the date of such Repurchase Event or (B) seven months after the acquisition of such Option Shares upon exercise of a Stock
Option (the “Option Shares Repurchase Period”). The “Option Shares Repurchase Price” shall be equal to the Fair Market Value of the Option Shares, determined as of the date the Committee elects to exercise its repurchase rights
in connection with a Repurchase Event. 
 (ii) Right of Repurchase With Respect to Restricted Stock and Shares issued pursuant to an
Unrestricted Stock Award or Restricted Stock Unit Award. Unless otherwise set forth in the agreement entered into by the recipient and the Company in connection with a Restricted Stock Award, Unrestricted Stock Award or Restricted Stock Unit
Award, the Company or its assigns shall have the right and option upon a Repurchase Event to repurchase from a Holder of Issued Shares received pursuant to a Restricted Stock Award, Unrestricted Stock Award or Restricted Stock Unit Award some or all
(as determined by the Company) of such Issued Shares at the price per share specified below. In addition, upon a Termination Event, the Company or its assigns shall have the right and option to repurchase from a Holder of Issued Shares received
pursuant to a Restricted Stock Award any Issued Shares which have not vested as of the Termination Event. Such repurchase right may be exercised by the Company within six months following the date of such Repurchase Event or Termination Event as
applicable (the “Non-Option Shares Repurchase Period”). The “Non-Option Shares Repurchase Price” shall be (i) in the case of Issued Shares which are vested as of the date of the Repurchase Event, the Fair Market Value of
such Issued Shares as of the date the Company elects to exercise its repurchase rights in connection with a Repurchase Event and (ii) in the case of Issued Shares which have not vested as of the date of the Repurchase Event or Termination Event
(as applicable), the lower of the original per share purchase price paid by the recipient subject to adjustment as provided in Section 3(b) or the current Fair Market Value of such Issued Shares as

  
 16 

 
of the date the Company elects to exercise its repurchase rights in connection with a Repurchase Event or Termination Event (as applicable). 

(iii) Procedure. Any repurchase right of the Company shall be exercised by the Company or its assigns by giving the Holder written
notice on or before the last day of the Option Shares Repurchase Period or Non-Option Shares Repurchase Period, as applicable, of its intention to exercise such repurchase right. Upon such notification, the Holder shall promptly surrender to the
Company, free and clear of any liens or encumbrances, any certificates representing the Shares being purchased, together with a duly executed stock power for the transfer of such Shares to the Company or the Company’s assignee or assignees.
Upon the Company’s or its assignee’s receipt of the certificates from the Holder, the Company or its assignee or assignees shall deliver to him, her or them a check for the Option Shares Repurchase Price or the Non-Option Shares Repurchase
Price, as applicable; provided, however, that the Company may pay the Option Shares Repurchase Price or Non-Option Shares Repurchase Price, as applicable, by offsetting and canceling any indebtedness then owed by the Holder to
the Company. 
 (d) Drag Along Right. In the event the holders of a majority of the Company’s equity securities then outstanding
(the “Majority Shareholders”) determine to enter into a Sale Event in a bona fide negotiated transaction (a “Sale”), with any non-Affiliate of the Company or any majority shareholder (in each case, the “Buyer”),
a Holder of Issued Shares, including any Permitted Transferees, shall be obligated to and shall upon the written request of the Majority Shareholders: (a) sell, transfer and deliver, or cause to be sold, transferred and delivered, to the Buyer,
his or her Issued Shares (including for this purpose all of such Holder’s or his or her Permitted Transferee’s Issued Shares that presently or as a result of any such transaction may be acquired upon the exercise of an Option (following
the payment of the exercise price therefor)) on substantially the same terms applicable to the Majority Shareholders (with appropriate adjustments to reflect the conversion of convertible securities, the redemption of redeemable securities and the
exercise of exercisable securities as well as the relative preferences and priorities of preferred stock); and (b) execute and deliver such instruments of conveyance and transfer and take such other action, including voting such Issued Shares
in favor of any Sale proposed by the Majority Shareholders and executing any purchase agreements, merger agreements, indemnity agreements, escrow agreements or related documents as the Majority Shareholders or the Buyer may reasonably require in
order to carry out the terms and provisions of this Section 9(d). 
 (e) Escrow Arrangement. 

(i) Escrow. In order to carry out the provisions of Sections 9(b), (c), and (d) of this Agreement more effectively, the Company
shall hold any Issued Shares in escrow together with separate stock powers executed by the Holder in blank for transfer, and any Permitted Transferee shall, as an additional condition to any transfer of Issued Shares, execute a like stock power as
to such Issued Shares. The Company shall not dispose of the Issued Shares except as otherwise provided in this Agreement. In the event of any repurchase by the Company (or any of its assigns), the Company is hereby authorized by the Holder and any
Permitted Transferee, as the Holder’s and each such Permitted Transferee’s attorney-in-fact, to date and complete the stock powers necessary for the transfer of the Issued Shares being purchased and to

  
 17 

 
transfer such Issued Shares in accordance with the terms hereof. At such time as any Issued Shares are no longer subject to the Company’s repurchase, first refusal and drag along rights, the
Company shall, at the written request of the Holder, deliver to the Holder (or the relevant Permitted Transferee) a certificate representing such Issued Shares with the balance of the Issued Shares to be held in escrow pursuant to this
Section 9(e). 
 (ii) Remedy. Without limitation of any other provision of this Agreement or other rights, in the event that a
Holder, any Permitted Transferees or any other Person is required to sell a Holder’s Issued Shares pursuant to the provisions of Sections 9(b), (c), or (d) hereof and in the further event that he or she refuses or for any reason fails to
deliver to the Company or its designated purchaser of such Issued Shares the certificate or certificates evidencing such Issued Shares together with a related stock power, the Company or such designated purchaser may deposit the applicable purchase
price for such Issued Shares with a bank designated by the Company, or with the Company’s independent public accounting firm, as agent or trustee, or in escrow, for such Holder, any Permitted Transferees or other Person, to be held by such bank
or accounting firm for the benefit of and for delivery to him, her, them or it, and/or, in its discretion, pay such purchase price by offsetting any indebtedness then owed by such Holder as provided above. Upon any such deposit and/or offset by the
Company or its designated purchaser of such amount and upon notice to the Person who was required to sell the Issued Shares to be sold pursuant to the provisions of Sections 9(b), (c), or (d), such Issued Shares shall at such time be deemed to have
been sold, assigned, transferred and conveyed to such purchaser, such Holder shall have no further rights thereto (other than the right to withdraw the payment thereof held in escrow, if applicable), and the Company shall record such transfer in its
stock transfer book or in any appropriate manner. 
 (f) Lockup Provision. A Holder agrees, if requested by the Company and any
underwriter engaged by the Company, not to sell or otherwise transfer or dispose of any Issued Shares (including, without limitation, pursuant to Rule 144 under the Securities Act) held by him or her for such period following the effective date of
any registration statement of the Company filed under the Securities Act as the Company or such underwriter shall specify reasonably and in good faith (such period not to exceed 210 days). The underwriters in connection with such registration are
intended third-party beneficiaries of this Section 9(f) and shall have the right, power and authority to enforce the provisions hereof as though they were a party hereto. Each Holder further agrees to execute such agreements as may be
reasonably requested by the underwriters in connection with such registration that are consistent with this Section 9(f) or that are necessary to give further effect thereto. 

(g) Adjustments for Changes in Capital Structure. If, as a result of any reorganization, recapitalization, reclassification, stock
dividend, stock split, reverse stock split or other similar change in the Stock, the outstanding shares of Stock are increased or decreased or are exchanged for a different number or kind of shares of the Company’s Stock, the restrictions
contained in this Section 9 shall apply with equal force to additional and/or substitute securities, if any, received by Holder in exchange for, or by virtue of his or her ownership of, Issued Shares. 

(h) Termination. The terms and provisions of Section 9(b), Section 9(c) (except for the Company’s right to repurchase
unvested Restricted Stock Awards upon a Termination Event) and Section 9(d) shall terminate upon the closing of the Company’s Initial Public Offering or 

  
 18 

 
upon consummation of any Sale Event, in either case as a result of which shares of the Company (or a successor entity) of the same class as the Issued Shares are registered under Section 12
of the Exchange Act and publicly traded on NASDAQ or any national security exchange. 
  

	SECTION 10.	TAX WITHHOLDING 

 (a) Payment by Grantee. Each grantee shall, no later than the
date as of which the value of an Award or of any Stock or other amounts received thereunder first becomes includable in the gross income of the grantee for Federal income tax purposes, pay to the Company, or make arrangements satisfactory to the
Committee regarding payment of, any Federal, state, or local taxes of any kind required by law to be withheld by the Company with respect to such income. The Company and any Subsidiary shall, to the extent permitted by law, have the right to deduct
any such taxes from any payment of any kind otherwise due to the grantee. The Company’s obligation to deliver stock certificates (or evidence of book entry) to any grantee is subject to and conditioned on any such tax withholding obligations
being satisfied by the grantee. 
 (b) Payment in Stock. Subject to approval by the Committee, a grantee may elect to have the
Company’s minimum required tax withholding obligation satisfied, in whole or in part, by authorizing the Company to withhold from shares of Stock to be issued pursuant to any Award a number of shares with an aggregate Fair Market Value (as of
the date the withholding is effected) that would satisfy the minimum withholding amount due. 
  

	SECTION 11.	SECTION 409A AWARDS. 

 To the extent that any Award is determined to constitute
“nonqualified deferred compensation” within the meaning of Section 409A (a “409A Award”), the Award shall be subject to such additional rules and requirements as specified by the Committee from time to time in order to
comply with Section 409A. In this regard, if any amount under a 409A Award is payable upon a “separation from service” (within the meaning of Section 409A) to a grantee who is considered a “specified employee” (within
the meaning of Section 409A), then no such payment shall be made prior to the date that is the earlier of (i) six months and one day after the grantee’s separation from service, or (ii) the grantee’s death, but only to the
extent such delay is necessary to prevent such payment from being subject to interest, penalties and/or additional tax imposed pursuant to Section 409A. 
  

	SECTION 12.	TRANSFER, LEAVE OF ABSENCE, ETC. 

 For purposes of the Plan, the following events shall
not be deemed a termination of a Service Relationship: 
 (a) a transfer to the employment of the Company from a Subsidiary or from the
Company to a Subsidiary, or from one Subsidiary to another; or 
 (b) an approved leave of absence for military service or sickness, or for
any other purpose approved by the Company, if the employee’s right to re-employment is guaranteed either by a statute or by contract or under the policy pursuant to which the leave of absence was granted or if the Committee otherwise so
provides in writing. 

  
 19 

	SECTION 13.	AMENDMENTS AND TERMINATION 

 The Board may, at any time, amend or discontinue the Plan
and the Committee may, at any time, amend or cancel any outstanding Award (or provide substitute Awards at the same or a reduced exercise or purchase price or with no exercise or purchase price in a manner not inconsistent with the terms of the
Plan; provided, that such price, if any, must satisfy the requirements which would apply to the substitute or amended Award if it were then initially granted under the Plan for the purpose of satisfying changes in law or for any other lawful
purpose), but no such action shall adversely affect rights under any outstanding Award without the consent of the holder of the Award. The Committee may exercise its discretion to reduce the exercise price of outstanding Stock Options or effect
repricing through cancellation of outstanding Awards and by granting such holders new Awards in replacement of the cancelled Awards. To the extent determined by the Committee to be required either by the Code to ensure that Incentive Stock Options
granted under the Plan are qualified under Section 422 of the Code or otherwise, Plan amendments shall be subject to approval by the Company stockholders entitled to vote at a meeting of stockholders. Nothing in this Section 13 shall limit
the Board’s or Committee’s authority to take any action permitted pursuant to Section 3(c). 
  

	SECTION 14.	STATUS OF PLAN 

 With respect to the portion of any Award that has not been exercised and
any payments in cash, Stock or other consideration not received by a grantee, a grantee shall have no rights greater than those of a general creditor of the Company unless the Committee shall otherwise expressly so determine in connection with any
Award or Awards. In its sole discretion, the Committee may authorize the creation of trusts or other arrangements to meet the Company’s obligations to deliver Stock or make payments with respect to Awards hereunder; provided, that the
existence of such trusts or other arrangements is consistent with the foregoing sentence. 
  

	SECTION 15.	GENERAL PROVISIONS 

 (a) No Distribution; Compliance with Legal Requirements. The
Committee may require each person acquiring Stock pursuant to an Award to represent to and agree with the Company in writing that such person is acquiring the shares of Stock without a view to distribution thereof. No shares of Stock shall be issued
pursuant to an Award until all applicable securities law and other legal and stock exchange or similar requirements have been satisfied. The Committee may require the placing of such stop-orders and restrictive legends on certificates for Stock and
Awards as it deems appropriate. The Committee may also condition the issuance of Stock pursuant to an Award on the recipient becoming a party to the Company’s Right of First Refusal and Co-Sale Agreement, Voting Agreement or other similar
agreements. 
 (b) Delivery of Stock Certificates. Stock certificates to grantees under the Plan shall be deemed delivered for all
purposes when the Company or a stock transfer agent of the Company shall have mailed such certificates in the United States mail, addressed to the grantee, at the grantee’s last known address on file with the Company. Uncertificated Stock shall
be deemed delivered for all purposes when the Company or a Stock transfer agent of the Company shall have given to the grantee by electronic mail (with proof of receipt) or by United States mail, addressed to the grantee, at the grantee’s last
known address on file with the Company, 

  
 20 

 
notice of issuance and recorded the issuance in its records (which may include electronic “book entry” records). 

(c) Other Compensation Arrangements; No Employment Rights. Nothing contained in the Plan shall prevent the Board from adopting
other or additional compensation arrangements, including trusts, and such arrangements may be either generally applicable or applicable only in specific cases. The adoption of the Plan and the grant of Awards do not confer upon any employee any
right to continued employment or Service Relationship with the Company or any Subsidiary. 
 (d) Trading Policy Restrictions. Option
exercises and other Awards under the Plan shall be subject to such Company’s insider trading policy-related restrictions, terms and conditions as may be established by the Committee, or in accordance with policies set by the Committee, from
time to time. 
 (e) Designation of Beneficiary. Each grantee to whom an Award has been made under the Plan may designate a
beneficiary or beneficiaries to exercise any Award on or after the grantee’s death or receive any payment under any Award payable on or after the grantee’s death. Any such designation shall be on a form provided for that purpose by the
Committee and shall not be effective until received by the Committee. If no beneficiary has been designated by a deceased grantee, or if the designated beneficiaries have predeceased the grantee, the beneficiary shall be the grantee’s estate.

 (f) Legend. Any certificate(s) representing the Issued Shares shall carry substantially the following legend (and with respect to
uncertificated Stock, the book entries evidencing such shares shall contain the following notation): 
 The transferability of this
certificate and the shares of stock represented hereby are subject to the restrictions, terms and conditions (including repurchase and restrictions against transfers) contained in the Zendesk, Inc. 2009 Stock Option and Grant Plan and any agreement
entered into thereunder by and between the company and the holder of this certificate (a copy of which is available at the offices of the company for examination). 
  

	SECTION 16.	EFFECTIVE DATE OF PLAN 

 The Plan shall become effective upon approval of stockholders,
within 12 months following the adoption of the Plan by the Board, in accordance with applicable state law, and the Company’s articles of incorporation and bylaws. Subject to such approval by the stockholders and to the requirement that no Stock
Option or other Award may be issued hereunder prior to such approval, Stock Options and other Awards may be granted hereunder on and after adoption of the Plan by the Board. No grants of Stock Options and other Awards may be made hereunder after the
tenth anniversary of the Effective Date or the date the Plan is approved by the Board, whichever is earlier. 

  
 21 

	SECTION 17.	GOVERNING LAW 

 This Plan, all Awards and any controversy arising out of or relating to
this Plan and all Awards shall be governed by and construed in accordance with the General Corporation Law of the State of Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance
with the internal laws of Massachusetts, without regard to conflict of law principles that would result in the application of any law other than the law of the State of Massachusetts. 

 

			
	Date Originally Approved by Board of Directors:	  	July 24, 2009
		
	Date Originally Approved by the Stockholders:	  	July 24, 2009

  
 22 

 NON-QUALIFIED STOCK OPTION AGREEMENT 

UNDER THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 

Pursuant to the Zendesk, Inc. 2009 Stock Option and Grant Plan, as amended (the “Plan,” attached herein and marked
Appendix A), Zendesk, Inc., a Delaware corporation (together with any successor thereto, the “Company”), hereby grants to the undersigned optionee (the “Optionee”), who is an employee of the Company or any of its
Subsidiaries, an option (the “Stock Option”) to purchase all or any part of the number of shares of Series B Common Stock, par value $0.01 per share (“Series B Common Stock”) of the Company indicated on the Stock Option Grant
Notice (“Grant Notice,” attached herein and marked Appendix D) (the “Underlying Shares,”), at the exercise price per share indicated in the Grant Notice (the “Option Exercise Price”), by filing a Stock Option
Exercise Notice (“Exercise Notice”) in the form attached herein and marked Appendix B. Such Exercise Notice may be filed on or prior to the expiration date (“Expiration Date”) indicated in Grant Notice, or such earlier
date as is specified herein, subject to the terms and conditions set forth in this Non-Qualified Stock Option Agreement (this “Agreement”) and in the Plan. This Stock Option is intended to be a non-qualified stock option. 

All capitalized terms used herein and not otherwise defined shall have the respective meanings set forth in the Non-Qualified Stock Option
Grant Notice and the Plan. 
 1. Vesting, Exercisability and Termination. 

(a) This Stock Option shall be immediately exercisable, regardless of whether the Underlying Shares are vested. 

(b) Except as set forth below, and subject to the determination of the Committee in its sole discretion to accelerate the vesting schedule
hereunder, the Underlying Shares shall be vested on the respective dates indicated below: 
 (i) All Underlying Shares shall
initially be unvested. 
 (ii) The Underlying Shares shall vest in accordance with the Vesting Schedule set forth in the
Grant Notice. 
 (c) Termination. Except as may otherwise be provided by the Committee, if the Optionee’s Service Relationship
is terminated, the period within which to exercise this Stock Option will be subject to earlier termination as set forth below (and if not exercised within such period, shall thereafter terminate subject, in each case to Section 3(c) of the
Plan): 
 (i) Termination Due to Death or Disability. If the Optionee’s Service Relationship terminates by reason
of such Optionee’s death or disability (as defined in Section 422(c) of the Code), this Stock Option may continue to be exercised, to the extent the Underlying Shares are vested on the date of termination, by the Optionee, the
Optionee’s legal representative or legatee for a period of 12 months from the date of 

 
death or disability (as defined in Section 422(c) of the Code) or until the Expiration Date, if earlier. 

(ii) Other Termination. If the Optionee’s Service Relationship terminates for any reason other than death or
disability (as defined in Section 422(c) of the Code), and unless otherwise determined by the Committee, this Stock Option may continue to be exercised, to the extent the Underlying Shares are vested on the date of termination, for a period of
90 days from the date of termination or until the Expiration Date, if earlier; provided however, if the Optionee’s Service Relationship is terminated for Cause, this Stock Option shall terminate immediately upon the date of such
termination. 
 For purposes hereof, the Committee’s determination of the reason for termination of the Optionee’s Service
Relationship shall be conclusive and binding on the Optionee and his or her representatives or legatees. Any portion of this Stock Option with respect to Underlying Shares that are not vested on the date of termination of the Service Relationship
shall terminate immediately and be null and void. 
 2. Exercise of Stock Option. The Optionee may exercise this Stock Option only in
the following manner: 
 (a) Prior to the Expiration Date, the Optionee may deliver an Exercise Notice indicating his or her election to
purchase some or all of the Underlying Shares. Such notice shall specify the number of Underlying Shares to be purchased. To the extent this Stock Option is only partially exercised, such exercise shall first be with respect to the Underlying
Shares, if any, that have previously vested, and then with respect to the Underlying Shares that will next vest, with the Underlying Shares that vest at the latest date being exercised last. Payment of the purchase price may be made by one or more
of the methods described in Section 5 of the Plan, subject to the limitations contained in such Section of the Plan, including the requirement that the Committee specifically approve in advance certain payment methods. 

(b) In the event the Optionee exercises a portion of this Stock Option with respect to Underlying Shares that have not vested, the Optionee
shall also deliver a Restricted Stock Agreement covering such unvested Underlying Shares in the form attached herein and marked Appendix C (the “Restricted Stock Agreement”) with the same vesting schedule for such Underlying Shares
as set forth for the Underlying Shares herein. The Restricted Stock Agreement shall be deemed a Restricted Stock Award and all Underlying Shares so acquired pursuant to such Restricted Stock Agreement shall be deemed Restricted Stock for all
purposes under the Plan. 
 (c) Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be
exercisable after the Expiration Date. 
 3. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Stock
Option shall be subject to and governed by all the terms and conditions of the Plan. 
 4. Transferability of Stock Option. This
Stock Option is personal to the Optionee and is not transferable by the Optionee in any manner other than by will or by the laws of descent and distribution. The Stock Option may be exercised during the Optionee’s lifetime only by the Optionee
(or by the Optionee’s guardian or personal representative in the event of the 

 
Optionee’s incapacity). The Optionee may elect to designate a beneficiary by providing written notice of the name of such beneficiary to the Company, and may revoke or change such
designation at any time by filing written notice of revocation or change with the Company; such beneficiary may exercise the Optionee’s Stock Option in the event of the Optionee’s death to the extent provided herein. If the Optionee does
not designate a beneficiary, or if the designated beneficiary predeceases the Optionee, the legal representative of the Optionee may exercise this Stock Option to the extent provided herein in the event of the Optionee’s death. 

5. Restrictions on Transfer of Underlying Shares. The Underlying Shares acquired upon exercise of the Stock Option may not be sold,
transferred or otherwise disposed of without the advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that the Optionee may transfer the
Underlying Shares without such consent (i) to a Permitted Transferee or upon the death of the Optionee, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan, and (ii) following an Initial Public
Offering. In addition, such Underlying Shares shall be subject to certain additional transfer restrictions and other limitations including, without limitation, the provisions contained in Section 9 of the Plan and, if applicable, the Restricted
Stock Agreement. 
 6. Repurchase Right. Upon a Termination Event, the Company shall have the right to repurchase the Underlying
Shares deemed Restricted Stock as of the date of such Termination Event as set forth in Section 9(c) of the Plan. 
 7.
Miscellaneous Provisions. 
 (a) Equitable Relief. The parties hereto agree and declare that legal remedies may be inadequate
to enforce the provisions of this Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(b) Adjustments for Changes in Capital Structure. If, as a result of any reorganization, recapitalization, reincorporation,
reclassification, stock dividend, stock split, reverse stock split or other similar change in the Series B Common Stock, the outstanding shares of Series B Common Stock are increased or decreased or are exchanged for a different number or kind of
securities of the Company, the restrictions contained in this Agreement shall apply with equal force to additional and/or substitute securities, if any, received by the Optionee in exchange for, or by virtue of his or her ownership of, this Stock
Option or Underlying Shares acquired pursuant thereto. 
 (c) Change and Modifications. This Agreement may not be orally changed,
modified or terminated, nor shall any oral waiver of any of its terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Optionee. 

(d) Governing Law. This Agreement shall be governed by and construed in accordance with the General Corporation Law of the State of
Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of California, without regard to conflict of law principles that would result in the application of
any law other than the law of the State of California. 

 (e) Headings. The headings are intended only for convenience in finding the subject matter
and do not constitute part of the text of this Agreement and shall not be considered in the interpretation of this Agreement. 
 (f)
Saving Clause. If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall in no manner affect the legality or enforceability of any other provision hereof. 

(g) Notices. All notices, requests, consents and other communications shall be in writing and be deemed given when delivered
personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the Optionee shall be addressed as set forth underneath their signatures below, or to
such other address or addresses as may have been furnished by such party in writing to the other. 
 (h) Benefit and Binding Effect.
This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their respective successors, permitted assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become
entitled to all the rights of the Company hereunder to the extent of such assignment. 
 (i) Counterparts. For the convenience of the
parties and to facilitate execution, this Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 

(j) Integration. This Agreement constitutes the entire agreement between the parties with respect to this Stock Option and supersedes
all prior agreements and discussions between the parties concerning such subject matter. 
 8. Dispute Resolution. 

(a) Except as provided below, any dispute arising out of or relating to the Plan or this Stock Option, this Agreement, or the breach,
termination or validity of the Plan, this Stock Option or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the
“J.A.M.S. Rules”). The arbitration shall be governed by the United States Arbitration Act, 9 U.S.C. Sections 1 16, and judgment upon the award rendered by the arbitrators may be entered by any court having jurisdiction thereof. The place
of arbitration shall be San Francisco, California. 
 (b) The arbitration shall commence within 60 days of the date on which a written
demand for arbitration is filed by any party hereto. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party witnesses. In addition, each party may
take up to three depositions as of right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not have the power to order the answering of
interrogatories or the response to requests for admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven business days before the date of the arbitration, the identity of all
persons that may testify at the arbitration and a copy of all documents that may be introduced at the arbitration or considered or used by a 

 
party’s witness or expert. The arbitrator’s decision and award shall be made and delivered within six months of the selection of the arbitrator. The arbitrator’s decision shall set
forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of actual compensatory damages and shall not multiply actual damages or award punitive damages, and each party
hereby irrevocably waives any claim to such damages. 
 (c) The Company, the Optionee, each party to the Agreement and any other holder of
Underlying Shares issued pursuant to this Agreement (each, a “Party”) covenants and agrees that such party will participate in the arbitration in good faith. This Section 7 applies equally to requests for temporary, preliminary or
permanent injunctive relief, except that in the case of temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding immediate and irreparable harm. 

(d) Each Party (i) hereby irrevocably submits to the jurisdiction of any United States District Court of competent jurisdiction for the
purpose of enforcing the award or decision in any such proceeding, (ii) hereby waives, and agrees not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject personally
to the jurisdiction of the above named courts, that its property is exempt or immune from attachment or execution (except as protected by applicable law), that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the
suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court, and (iii) hereby waives and agrees not to seek any review by any court of any other jurisdiction which may be
called upon to grant an enforcement of the judgment of any such court. Each Party hereby consents to service of process by registered mail at the address to which notices are to be given. Each Party agrees that its, his or her submission to
jurisdiction and its, his or her consent to service of process by mail is made for the express benefit of each other Party. Final judgment against any Party in any such action, suit or proceeding may be enforced in other jurisdictions by suit,
action or proceeding on the judgment, or in any other manner provided by or pursuant to the laws of such other jurisdiction. 
 [SIGNATURE
PAGE FOLLOWS] 

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to
by the undersigned as of the date first above written. 
  

			
	ZENDESK, INC., San Francisco, CA
		
	By:	 	  

		 	Alan Black, CFO

 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, including, without limitation,
Section 9 thereof, and understands that the Stock Option granted hereby is subject to the terms of the Plan and of this Agreement. 
 The undersigned
also hereby acknowledges and agrees that the Underlying Shares are subject to transfer restrictions as set forth in Section 5 of the Agreement. 
 This
Agreement is hereby accepted, and the terms and conditions thereof and of the Plan, SPECIFICALLY INCLUDING THE ARBITRATION PROVISIONS IN SECTION 8 OF THIS AGREEMENT, are hereby agreed to, by the undersigned as of the date first above written. 

 

			
	OPTIONEE (Sign)	 	  

 
			
		
	Printed name:	 	  

 
			
		
	Address:	 	  

	
	  

 SPOUSE’S CONSENT (if Optionee’s state of residence is Arizona, California, Idaho, Louisiana, Nevada, New
Mexico, Texas, Washington or Wisconsin) 
 I acknowledge that I have read the foregoing Non-Qualified Stock Option Agreement and understand the
contents thereof. 
  

			
	Sign:	 	  

 DESIGNATED BENEFICIARY (if Optionee wishes to designate in accordance with Sec. 4) 

 

			
	Beneficiary Name:	 	 

 
			
		
	Address:	 	 

 APPENDIX A 

ZENDESK, INC. 2009 STOCK OPTION AND GRANT PLAN 

 APPENDIX B 

STOCK OPTION EXERCISE NOTICE FOR VESTED AND EARLY EXERCISE 
  

	To:	Zendesk, Inc., attention Chief Financial Officer 

 Pursuant to the terms of my stock
option agreement(s) between the undersigned and Zendesk, Inc. (the “Company”) under the Zendesk, Inc. 2009 Stock Option and Grant Plan, I hereby exercise such option by including herein payment in the form of a personal check representing
the purchase price for the Underlying Shares. 
  

											
		 	 Name of Optionee:	 	  
	 		  	Today’s Date	  	  

  

											
	 	  	# of
Underlying
Shares	  	Strike Price
per
Underlying
Share	 	  	Aggregate
exercise price	 
	 Number of Underlying Shares underlying options originally granted on _____________, 20___
	  		  	$	 	  	  			
	  
 (if multiple options are
involved, please list separately)
	  		  				  			
				
	 Vested Underlying Shares that I am acquiring
	  		  	$	 	  	  	$	 	  
				
	 Unvested Underlying Shares that I am acquiring by exercising early
	  		  	$	 	  	  	$	 	  
				
	 Unvested Underlying Shares that I am not acquiring now
	  		  				  			
				
	 Payment to Zendesk
	  		  				  	$	 	  

 In connection with my exercise of the option as set forth above, I hereby represent and warrant to the Company as follows:

 (i) I am purchasing the Underlying Shares for my own account for investment only, and not for resale or with a view to the
distribution thereof. 

 (ii) I have had such an opportunity as I have deemed adequate to obtain from the
Company such information as is necessary to permit me to evaluate the merits and risks of my investment in the Company and have consulted with my own advisers with respect to my investment in the Company, including tax advisers with regards to any
tax implications involved with exercising a Non-Qualified Stock Option. 
 (iii) I have sufficient experience in business,
financial and investment matters to be able to evaluate the risks involved in the purchase of the Underlying Shares and to make an informed investment decision with respect to such purchase. 

(iv) I can afford a complete loss of the value of the Underlying Shares and am able to bear the economic risk of holding such
Underlying Shares for an indefinite period of time. 
 (v) I understand that the shares of Series B Common Stock that I
acquire upon exercise of the Options (using Appendix B) as well as any shares of Series A Common Stock and Series B Common Stock that I have previously purchased, been granted, or that are subject to other awards made to you under the Plan,
may not be sold, transferred or otherwise disposed of without the advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that I may transfer any
such shares without such consent (i) to a Permitted Transferee (as defined in the Plan) or upon my death, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan, and (ii) subject to the other
transfer restrictions as set forth in Section 9 of the Plan, upon an Initial Public Offering. 
 (vi) I understand that
the Underlying Shares may not be registered under the Securities Act of 1933 (it being understood that the Underlying Shares are being issued and sold in reliance on the exemption provided in Rule 701 thereunder) or any applicable state securities
or “blue sky” laws and may not be sold or otherwise transferred or disposed of in the absence of an effective registration statement under the Securities Act of 1933 and under any applicable state securities or “blue sky” laws
(or exemptions from the registration requirement thereof). I further acknowledge that certificates representing Underlying Shares will bear restrictive legends reflecting the foregoing and/or that book entries for uncertificated Underlying Shares
will include similar restrictive notations. 
 (vii) To the extent required, I have executed and delivered to the Company the
Restricted Stock Agreement, attached as Appendix C to the Agreement. 
 (viii) I have read and understand the Plan and
acknowledge and agree that the Underlying Shares are subject to all of the relevant terms of the Plan, including without limitation, the transfer restrictions set forth in Section 9 of the Plan. 

(ix) I understand and agree that the Company has a right of first refusal with respect to the Underlying Shares pursuant to
Section 9(b) of the Plan. 
 (x) I understand and agree that the Company has certain repurchase rights with respect to
the Underlying Shares (including, without limitation, Underlying Shares deemed Restricted Stock issued pursuant to a Restricted Stock Award) pursuant to Section 9(c) of the Plan. 

 (xi) I understand and agree that I may not sell or otherwise transfer or dispose of the
Underlying Shares for a period of time following the effective date of a public offering by the Company as described in Section 9(f) of the Plan. 
  

	
	Sincerely yours,
	
	OPTIONEE:
	
	  

	Name:
	
	Address:
	
	  

	
	  

	
	  

 APPENDIX C 

RESTRICTED STOCK AGREEMENT FOR EARLY EXERCISE OF NON-QUALIFIED STOCK OPTION 

UNDER THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 
  

			
	 Optionee
Name
	  	 
	 Date of Original Grant
	  	 
	 Date of Early Exercise Notice
	  	 
	
Number of Restricted Shares purchased herein
	  	 
	 Price paid per share
	  	 
	 Aggregate purchase price
	  	 

 All capitalized terms used in this Restricted Stock Agreement for Early Exercise Option
(“Agreement”) and not otherwise defined shall have the respective meanings set forth in the Non-Qualified Stock Option Agreement (including Appendices thereto) (the “Option Agreement”) between Zendesk, Inc. (the
“Company”) and undersigned Optionee granting Optionee Stock Options to purchase shares of Series B Common Stock under the Zendesk, Inc. 2009 Stock Option and Grant Plan (the “Plan”), as amended by the Amendment to Stock Option
Agreement signed by the Optionee (collectively, the “Option Agreement”). This Agreement shall be considered a Restricted Stock Award for all purposes under the Plan. 

Upon signing this Agreement and delivering the Stock Option Notice (“Exercise Notice”) to the Company, Company shall deliver to
Optionee Underlying Shares to be acquired upon exercise, subject to the following terms: 
 1. Purchase and Sale of Underlying Shares;
Vesting. 
 (a) Purchase and Sale. The Company hereby sells to the Optionee, and the Optionee is purchasing from the Company, the
number of Underlying Shares set forth in the Exercise Notice, pursuant to the Option Agreement, for the aggregate Option Exercise Price for the Underlying Shares so purchased. 

(b) Vesting. The risk of forfeiture shall lapse with respect to the Underlying Shares, and such Underlying Shares shall become vested,
on the respective dates indicated on the Vesting Schedule set forth in Appendix D to the Option Agreement. The Underlying Shares shall be considered Shares of Restricted Stock (as defined in the Plan) for purposes of this Agreement and the
Plan. 

 2. Repurchase Right. Upon a Termination Event or Repurchase Event, the Company shall have
the right to repurchase the Underlying Shares deemed to be Restricted Stock as set forth in Section 9(c) of the Plan. 
 3.
Restrictions on Transfer of Underlying Shares. The Underlying Shares (whether or not vested) may not be sold, transferred or otherwise disposed of without the advance express written consent of the Company, which consent may be given or
denied in the Company’s sole and absolute discretion; provided, however, that the Underlying Shares may be transferred without such consent (i) to a Permitted Transferee or upon death, in accordance with the terms and conditions of
Section 9(a)(ii)(A) and (B) of the Plan, and (ii) subject to the other transfer restrictions as set forth in Section 9 of the Plan, following a Initial Public Offering. The Underlying Shares (whether or not vested) shall remain
subject to the other transfer restrictions and other limitations including, without limitation, the provisions contained in Section 9 of the Plan. 

4. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Restricted Stock Agreement shall be subject to and
governed by all the terms and conditions of the Plan. 
 5. Escrow and Stock Assignment. The certificates for any Underlying Shares
shall be deposited in escrow with the Company to be held in escrow with the Company. Each deposited certificate shall be accompanied by a duly executed stock assignment separate from certificate in the form attached hereto as Appendix C-1 (the
“Assignment”). The deposited certificates and the Assignment, together with any other assets or securities from time to time deposited with the Company pursuant to this Agreement shall remain in escrow until such time or times as the
Underlying Shares are released from the Company’s right to repurchase the Underlying Shares as set forth in Section 9(c) of the Plan. If the Company (or its assignees) elects to exercise its right to repurchase the Underlying Shares as set
forth in Section 9(c) of the Plan then the escrowed certificates for such Underlying Shares being repurchased (together with any other assets or securities issued with respect thereto) shall be delivered to the Company, concurrently with the
payment to the Holder, in cash or cash equivalent (including the cancellation of any purchase-money indebtedness), of an amount equal to the applicable repurchase price for the Underlying Shares being repurchased, and the Optionee shall cease to
have any further rights or claims with respect to such Underlying Shares (or other assets or securities attributable to such Underlying Shares). 

6. Miscellaneous Provisions. 

(a) Record Owner; Dividends. The Optionee and any Permitted Transferees, during the duration of this Agreement, shall be considered the
record owners of and shall be entitled to vote the Underlying Shares if and to the extent the Underlying Shares are entitled to voting rights. The Optionee and any Permitted Transferees shall be entitled to receive all dividends and any other
distributions declared on the Underlying Shares; provided, however, that the Company is under no duty to declare any such dividends or to make any such distribution. 

(b) Section 83(b) Election. The Optionee shall consult with the Optionee’s tax advisor to determine whether it would be
appropriate for the Optionee to make an election 

 
under Section 83(b) of the Code with respect to the Underlying Shares. Any such election must be filed with the Internal Revenue Service within 30 days of the date of exercise. If the
Optionee makes an election under Section 83(b) of the Code, the Optionee shall give prompt notice to the Company (and provide a copy of such election to the Company). 

(c) Equitable Relief. The parties hereto agree and declare that legal remedies may be inadequate to enforce the provisions of this
Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(d) Change and Modifications. This Agreement may not be orally changed, modified or terminated, nor shall any oral waiver of any of its
terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Optionee. 

(e) Governing Law. This Agreement shall be governed by and construed in accordance with the General Corporation Law of the State of
Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of California, without regard to conflict of law principles that would result in the application of
any law other than the law of the State of California. 
 (f) Headings. The headings are intended only for convenience in finding the
subject matter and do not constitute part of the text of this Agreement and shall not be considered in the interpretation of this Agreement. 

(g) Saving Clause. If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall
in no manner affect the legality or enforceability of any other provision hereof. 
 (h) Notices. All notices, requests, consents and
other communications shall be in writing and be deemed given when delivered personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the
Optionee shall be addressed as set forth underneath their signatures below, or to such other address or addresses as may have been furnished by such party in writing to the other. 

(i) Benefit and Binding Effect. This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their
respective successors, assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become entitled to all the rights of the Company hereunder to the extent of such assignment. 

(j) Counterparts. For the convenience of the parties and to facilitate execution, this Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 

 7. Dispute Resolution. 

(a) Except as provided below, any dispute arising out of or relating to the Plan or the Underlying Shares, this Agreement, or the breach,
termination or validity of the Plan, the Underlying Shares or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the
“J.A.M.S. Rules”). The arbitration shall be governed by the United States Arbitration Act, 9 U.S.C. Sections 1 - 16, and judgment upon the award rendered by the arbitrators may be entered by any court having jurisdiction thereof. The place
of arbitration shall be San Francisco, California. 
 (b) The arbitration shall commence within 60 days of the date on which a written
demand for arbitration is filed by any party hereto. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party witnesses. In addition, each party may
take up to three depositions as of right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not have the power to order the answering of
interrogatories or the response to requests for admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven business days before the date of the arbitration, the identity of all
persons that may testify at the arbitration and a copy of all documents that may be introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and award shall be made and delivered within
six months of the selection of the arbitrator. The arbitrator’s decision shall set forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of actual compensatory
damages and shall not multiply actual damages or award punitive damages, and each party hereby irrevocably waives any claim to such damages. 

(c) The Company, the Optionee, each party to the Agreement and any other holder of Underlying Shares issued pursuant to this Agreement (each,
a “Party”) covenants and agrees that such party will participate in the arbitration in good faith. This Section 7 applies equally to requests for temporary, preliminary or permanent injunctive relief, except that in the case of
temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding immediate and irreparable harm. 

(d) Each Party (i) hereby irrevocably submits to the jurisdiction of any United States District Court of competent jurisdiction for the
purpose of enforcing the award or decision in any such proceeding, (ii) hereby waives, and agrees not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject personally
to the jurisdiction of the above named courts, that its property is exempt or immune from attachment or execution (except as protected by applicable law), that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the
suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court, and (iii) hereby waives and agrees not to seek any review by any court of any other jurisdiction which may be
called upon to grant an enforcement of the judgment of any such court. Each Party hereby consents to service of process by registered mail at the address to which notices are to be given. Each Party agrees that its, his or her submission to
jurisdiction 

 
and its, his or her consent to service of process by mail is made for the express benefit of each other Party. Final judgment against any Party in any such action, suit or proceeding may be
enforced in other jurisdictions by suit, action or proceeding on the judgment, or in any other manner provided by or pursuant to the laws of such other jurisdiction. 

[SIGNATURE PAGE FOLLOWS] 

 The foregoing Restricted Stock Agreement is hereby accepted and the terms and conditions thereof
are hereby agreed to by the undersigned as of the date first above written. 
  

			
	ZENDESK, INC.
		
	By:	 	  

		 	Chief Financial Officer

 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, including, without limitation,
Section 9 thereof and understands that the Underlying Shares purchased hereby are subject to the terms of the Plan and this Agreement. This Agreement is hereby accepted, and the terms and conditions of the Plan, the Option Agreement and this
Agreement, SPECIFICALLY INCLUDING THE ARBITRATION PROVISIONS SET FORTH IN SECTION 7 OF THIS AGREEMENT, are hereby agreed to, by the undersigned as of the date first above written. 

 

	
	OPTIONEE:
	
	  

	Name:
	
	Address:
	
	  

	
	  

	
	  

 SPOUSE’S CONSENT1 

I acknowledge that I have read the foregoing Restricted Stock Agreement and understand the contents thereof. 

 

	
	  

	
	Name:

  

	1 	A spouse’s consent if the Optionee’s state of residence is one of the following community property states: Arizona, California, Idaho, Louisiana, New Mexico, Nevada, Texas, Washington and Wisconsin.

 Appendix 1 to 

Restricted Stock Agreement 

STOCK ASSIGNMENT SEPARATE FROM CERTIFICATE 

FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers unto Zendesk, Inc. ______ shares of Common Stock of the Company standing in the
undersigned’s name on the books of the Company represented by Certificate(s) No. ___ herewith and hereby irrevocably constitutes and appoints the Secretary and other officers of the Company attorneys to transfer said stock on the books of the
Company with full power of substitution in the premises. 
  

			
	Date:	 	  

		
	By:	 	  

			
		
	Print Stockholder Name:	 	  

 INSTRUCTIONS: Stockholder to sign and print name only. All other blanks and date should be left blank. To be completed by
Company upon exercise of repurchase right. 

 APPENDIX D 

STOCK OPTION GRANT NOTICE 
  

			
	Name of Optionee:	  	_____________________________________________    
		
	No. of Underlying Shares	  	_______________ Shares of Series B Common Stock
		
	Grant Date:	  	___________________________, 201___
		
	Expiration Date:	  	___________________________, 202___
		
	Vesting begins on:	  	___________________________, 201___   (Vesting Commencement Date)
		
	Option Exercise Price/Share:	  	$0.__________

 Vesting Schedule: 

Subject to the determination of the Committee in its sole discretion to accelerate the vesting schedule hereunder, this Stock Option shall be vested with
respect to the Underlying Shares on the respective dates indicated below: 
 (i) 25% of the Underlying Shares shall vest on the first anniversary of the
Vesting Commencement Date; and 
 (ii) 2.0833% of the Underlying Shares shall vest each completed month for 36 months following the first anniversary of the
Vesting Commencement Date, 
 so long as the Optionee maintains a Service Relationship on each such date. 

Notwithstanding anything in the Agreement to the contrary in the case of a Sale Event, this Stock Option shall be treated as provided in
Section 3(c) of the Plan. 

 INCENTIVE STOCK OPTION AGREEMENT 

UNDER THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 

Pursuant to the Zendesk, Inc. 2009 Stock Option and Grant Plan, as amended (the “Plan,” attached herein and marked
Appendix A), Zendesk, Inc., a Delaware corporation (together with any successor thereto, the “Company”), hereby grants to the undersigned optionee (the “Optionee”), who is an employee of the Company or any of its
Subsidiaries, an option (the “Stock Option”) to purchase all or any part of the number of shares of Series B Common Stock, par value $0.01 per share (“Series B Common Stock”) of the Company indicated on the Stock Option Grant
Notice (“Grant Notice,” attached herein and marked Appendix D) (the “Underlying Shares,” and such shares once issued shall be referred to as the “Option Shares”), at the exercise price per share indicated in the
Grant Notice (the “Option Exercise Price”), by filing a Stock Option Exercise Notice (“Exercise Notice”) in the form attached herein and marked Appendix B. Such Exercise Notice may be filed on or prior to the expiration
date (“Expiration Date”) indicated in Grant Notice, or such earlier date as is specified herein, subject to the terms and conditions set forth in this Incentive Stock Option Agreement (this “Agreement”) and in the Plan. This
Stock Option is intended to qualify as an “incentive stock option” as defined in Section 422(b) of the Internal Revenue Code of 1986, as amended from time to time (the “Code”). To the extent that any portion of the Stock
Option does not so qualify, it shall be deemed a non-qualified stock option. 
 All capitalized terms used herein and not otherwise defined
shall have the respective meanings set forth in the Incentive Stock Option Grant Notice and the Plan. 
 1. Vesting, Exercisability and
Termination. 
 (a) Subject to the following limitation, this Stock Option shall be immediately exercisable, regardless of whether the
Shares are vested. Exercised shares are limited to less than $100,000 in aggregate exercise price (shares time purchase price per share) on a calendar year basis. Therefore, the ability to exercise unvested options are limited if they cause the
aggregate exercise price to exceed $100,000 in any one calendar year. 
 (b) Except as set forth below, and subject to the determination of
the Committee in its sole discretion to accelerate the vesting schedule hereunder, the Shares shall be vested on the respective dates indicated below: 

(i) All Shares shall initially be unvested. 

(ii) The Shares shall vest in accordance with the Vesting Schedule set forth in the Grant Notice. 

(c) Termination. Except as may otherwise be provided by the Committee, if the Optionee’s Service Relationship is terminated, the
period within which to exercise this Stock Option will be subject to earlier termination as set forth below (and if not exercised within such period, shall thereafter terminate subject, in each case to Section 3(c) of the Plan): 

(i) Termination Due to Death or Disability. If the Optionee’s Service Relationship terminates by reason of such
Optionee’s death or disability (as defined in Section 422(c) of the Code), this Stock Option may continue to be exercised, to the extent the Shares are vested on the date of termination, by the Optionee, the Optionee’s legal
representative or legatee for a period of 12 months from the date of death or disability (as defined in Section 422(c) of the Code) or until the Expiration Date, if earlier. 

 (ii) Other Termination. If the Optionee’s Service Relationship
terminates for any reason other than death or disability (as defined in Section 422(c) of the Code), and unless otherwise determined by the Committee, this Stock Option may continue to be exercised, to the extent the Shares are vested on the
date of termination, for a period of 90 days from the date of termination or until the Expiration Date, if earlier; provided however, if the Optionee’s Service Relationship is terminated for Cause, this Stock Option shall
terminate immediately upon the date of such termination. 
 For purposes hereof, the Committee’s determination of the reason for
termination of the Optionee’s Service Relationship shall be conclusive and binding on the Optionee and his or her representatives or legatees. Any portion of this Stock Option with respect to Shares that are not vested on the date of
termination of the Service Relationship shall terminate immediately and be null and void. 
 (d) It is understood and intended that this
Stock Option is intended to qualify as an “incentive stock option” as defined in Section 422 of the Code to the extent permitted under applicable law. Accordingly, the Optionee understands that in order to obtain the benefits of an
incentive stock option under Section 422 of the Code, no sale or other disposition may be made of Shares for which incentive stock option treatment is desired within the one-year period beginning on the
day after the day of the transfer of such Shares to him or her, nor within the two-year period beginning on the day after Grant Date of this Stock Option and further that this Stock Option must be exercised
within three months after termination of employment as an employee (or 12 months in the case of death or disability) to qualify as an incentive stock option. If the Optionee disposes (whether by sale, gift, transfer or otherwise) of any such Shares
within either of these periods, he or she will notify the Company within 30 days after such disposition. The Optionee also agrees to provide the Company with any information concerning any such dispositions required by the Company for tax purposes.
Further, to the extent this Stock Option and any other incentive stock options of the Optionee having an aggregate Fair Market Value in excess of $100,000 (determined as of the Grant Date) first become exercisable in any year, such options will not
qualify as incentive stock options. 
 2. Exercise of Stock Option. 

(a) The Optionee may exercise this Stock Option only in the following manner: Prior to the Expiration Date, the Optionee may deliver an
Exercise Notice indicating his or her election to purchase some or all of the Shares. Such notice shall specify the number of Shares to be purchased. To the extent this Stock Option is only partially exercised, such exercise shall first be with
respect to the Shares, if any, that have previously vested, and then with respect to the Shares that will next vest, with the Shares that vest at the latest date being exercised last. Payment of the purchase price may be made by one or more of the
methods described in Section 5 of the Plan, subject to the limitations contained in such Section of the Plan, including the requirement that the Committee specifically approve in advance certain payment methods. 

 (b) In the event the Optionee exercises a portion of this Stock Option with respect to Shares
that have not vested, the Optionee shall also deliver a Restricted Stock Agreement covering such unvested Shares (the “Restricted Stock Agreement”) with the same vesting schedule for such Shares as set forth for such Shares herein. 

(c) Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be exercisable after the Expiration Date.

 3. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Stock Option shall be subject to and governed by
all the terms and conditions of the Plan. 
 4. Transferability of Stock Option. This Stock Option is personal to the Optionee and is
not transferable by the Optionee in any manner other than by will or by the laws of descent and distribution. The Stock Option may be exercised during the Optionee’s lifetime only by the Optionee (or by the Optionee’s guardian or personal
representative in the event of the Optionee’s incapacity). The Optionee may elect to designate a beneficiary by providing written notice of the name of such beneficiary to the Company, and may revoke or change such designation at any time by
filing written notice of revocation or change with the Company; such beneficiary may exercise the Optionee’s Stock Option in the event of the Optionee’s death to the extent provided herein. If the Optionee does not designate a beneficiary,
or if the designated beneficiary predeceases the Optionee, the legal representative of the Optionee may exercise this Stock Option to the extent provided herein in the event of the Optionee’s death. 

5. Restrictions on Transfer of Shares. The Shares acquired upon exercise of the Stock Option may not be sold, transferred or otherwise
disposed of without the advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that the Optionee may transfer the Shares without such consent
(ii) to a Permitted Transferee or upon the death of the Optionee, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan, and (ii) following an Initial Public Offering. In addition, such Shares
shall be subject to certain additional transfer restrictions and other limitations including, without limitation, the provisions contained in Section 9 of the Plan and, if applicable, the Restricted Stock Agreement. 

6. Repurchase Right. Upon a Termination Event, the Company shall have the right to repurchase the Underlying Shares of Restricted Stock
that are unvested as of the date of such Termination Event as set forth in Section 9(c) of the Plan. 
 7. Miscellaneous
Provisions. 
 (a) Equitable Relief. The parties hereto agree and declare that legal remedies may be inadequate to enforce the
provisions of this Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(b) Adjustments for Changes in Capital Structure. If, as a result of any reorganization, recapitalization, reincorporation,
reclassification, stock dividend, stock split, reverse stock split or other similar change in the Series B Common Stock, the outstanding shares of Series B Common Stock are increased or decreased or are exchanged for a different number or kind of
securities of the Company, the restrictions contained in this Agreement shall apply with 

 
equal force to additional and/or substitute securities, if any, received by the Optionee in exchange for, or by virtue of his or her ownership of, this Stock Option or Shares acquired pursuant
thereto. 
 (c) Change and Modifications. This Agreement may not be orally changed, modified or terminated, nor shall any oral waiver
of any of its terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Optionee. 

(d) Governing Law. This Agreement shall be governed by and construed in accordance with the General Corporation Law of the State of
Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of California, without regard to conflict of law principles that would result in the application of
any law other than the law of the State of California. 
 (e) Headings. The headings are intended only for convenience in finding the
subject matter and do not constitute part of the text of this Agreement and shall not be considered in the interpretation of this Agreement. 

(f) Saving Clause. If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall
in no manner affect the legality or enforceability of any other provision hereof. 
 (g) Notices. All notices, requests, consents and
other communications shall be in writing and be deemed given when delivered personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the
Optionee shall be addressed as set forth underneath their signatures below, or to such other address or addresses as may have been furnished by such party in writing to the other. 

(h) Benefit and Binding Effect. This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their
respective successors, permitted assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become entitled to all the rights of the Company hereunder to the extent of such assignment. 

(i) Counterparts. For the convenience of the parties and to facilitate execution, this Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 
 (j)
Integration. This Agreement constitutes the entire agreement between the parties with respect to this Stock Option and supersedes all prior agreements and discussions between the parties concerning such subject matter. 

8. Dispute Resolution. 

(a) Except as provided below, any dispute arising out of or relating to the Plan or this Stock Option, this Agreement, or the breach,
termination or validity of the Plan, this Stock Option or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures

 
(the “J.A.M.S. Rules”). The arbitration shall be governed by the United States Arbitration Act, 9 U.S.C. Sections 1 16, and judgment upon the award rendered by the arbitrators may be
entered by any court having jurisdiction thereof. The place of arbitration shall be San Francisco, California. 
 (b) The arbitration shall
commence within 60 days of the date on which a written demand for arbitration is filed by any party hereto. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any
third-party witnesses. In addition, each party may take up to three depositions as of right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not
have the power to order the answering of interrogatories or the response to requests for admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven business days before the date of
the arbitration, the identity of all persons that may testify at the arbitration and a copy of all documents that may be introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and
award shall be made and delivered within six months of the selection of the arbitrator. The arbitrator’s decision shall set forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award
damages in excess of actual compensatory damages and shall not multiply actual damages or award punitive damages, and each party hereby irrevocably waives any claim to such damages. 

(c) The Company, the Optionee, each party to the Agreement and any other holder of Shares issued pursuant to this Agreement (each, a
“Party”) covenants and agrees that such party will participate in the arbitration in good faith. This Section 7 applies equally to requests for temporary, preliminary or permanent injunctive relief, except that in the case of
temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding immediate and irreparable harm. 

(d) Each Party (i) hereby irrevocably submits to the jurisdiction of any United States District Court of competent jurisdiction for the
purpose of enforcing the award or decision in any such proceeding, (ii) hereby waives, and agrees not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject personally
to the jurisdiction of the above named courts, that its property is exempt or immune from attachment or execution (except as protected by applicable law), that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the
suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court, and (iii) hereby waives and agrees not to seek any review by any court of any other jurisdiction which may be
called upon to grant an enforcement of the judgment of any such court. Each Party hereby consents to service of process by registered mail at the address to which notices are to be given. Each Party agrees that its, his or her submission to
jurisdiction and its, his or her consent to service of process by mail is made for the express benefit of each other Party. Final judgment against any Party in any such action, suit or proceeding may be enforced in other jurisdictions by suit,
action or proceeding on the judgment, or in any other manner provided by or pursuant to the laws of such other jurisdiction. 
 [SIGNATURE
PAGE FOLLOWS] 

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to
by the undersigned as of the date first above written. 
  

			
	ZENDESK, INC., San Francisco, CA
		
	By:	 	  

		 	Alan Black, CFO

 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, including, without limitation,
Section 9 thereof, and understands that the Stock Option granted hereby is subject to the terms of the Plan and of this Agreement. 
 The undersigned
also hereby acknowledges and agrees that the Option Shares are subject to transfer restrictions as set forth in Section 5 of the Agreement. 
 This
Agreement is hereby accepted, and the terms and conditions thereof and of the Plan, SPECIFICALLY INCLUDING THE ARBITRATION PROVISIONS IN SECTION 7 OF THIS AGREEMENT, are hereby agreed to, by the undersigned as of the date first above written. 

 

			
	OPTIONEE (Sign)	 	  

 

			
	Printed name:	 	  

 

			
	Address:	 	  

	
	  

 SPOUSE’S CONSENT (if Optionee’s state of residence is Arizona, California, Idaho, Louisiana, Nevada, New
Mexico, Texas, Washington or Wisconsin) 
 I acknowledge that I have read the foregoing Incentive Stock Option Agreement and understand the contents
thereof. 
  

			
	Sign:	 	  

 DESIGNATED BENEFICIARY (if Optionee wishes to designate in accordance with Sec. 4) 

 

	
	 Beneficiary Name:

	
	 Address:

 APPENDIX A 

ZENDESK, INC. 2009 STOCK OPTION AND GRANT PLAN 

 APPENDIX B 

STOCK OPTION EXERCISE NOTICE FOR VESTED AND EARLY EXERCISE 
  

	To:	Zendesk, Inc, attention Chief Financial Officer 

 Pursuant to the terms of my stock
option agreement(s) between the undersigned and Zendesk, Inc. (the “Company”) under the Zendesk, Inc. 2009 Stock Option and Grant Plan, I hereby exercise such option by including herein payment in the form of a personal check representing
the purchase price for the Underlying Shares. 
  

											
		 	Name of Optionee:	 	  
	  		 	Today’s Date	  	  

  

											
	 	 	# of Options	 	Strike Price
per Share	 	 	Extended
exercise price	 
				
	 Number of options originally granted on ____________, 20___

 
 (if multiple options are involved, please list
separately)
	 		 	$	        	  	 			
	 If applicable, converted to:

Number of options after March 2011 Two-for-One stock split
	 		 	$	 	  	 			
	 If applicable, converted to:

Number of options after April 2012 Two-for-One stock split
	 		 	$	 	  	 			
				
	 Vested options that I am exercising
	 		 	$	 	  	 	$	            	  
				
	 Unvested options that I am exercising early
	 		 	$	 	  	 	$	 	  
				
	 Unvested options that I am not exercising now
	 		 				 			
				
	 Payment to Zendesk
	 		 				 	$	 	  

 In connection with my exercise of the option as set forth above, I hereby represent and warrant to the Company as follows:

 (i) I am purchasing the Underlying Shares for my own account for investment only, and not for resale or with a view to the
distribution thereof. 

 (ii) I have had such an opportunity as I have deemed adequate to obtain from the
Company such information as is necessary to permit me to evaluate the merits and risks of my investment in the Company and have consulted with my own advisers with respect to my investment in the Company, INCLUDING TAX ADVISERS WITH REGARDS TO ANY
AMT (Alternative Minimum Tax) implications involved with executing an Incentive Stock Option. 
 (iii) I have sufficient
experience in business, financial and investment matters to be able to evaluate the risks involved in the purchase of the Underlying Shares and to make an informed investment decision with respect to such purchase. 

(iv) I can afford a complete loss of the value of the Option Shares and am able to bear the economic risk of holding such
Option Shares for an indefinite period of time. 
 (v) I understand that the shares of Series B Common Stock that I acquire
upon exercise of the Options (using Exhibit B) as well as any shares of Series A Common Stock and Series B Common Stock that I have previously purchased, been granted, or that are subject to other awards made to you under the Plan, may not be sold,
transferred or otherwise disposed of without the advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that I may transfer any such shares without
such consent (i) to a Permitted Transferee (as defined in the Plan) or upon my death, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan, and (ii) upon an Initial Public Offering. 

(vi) I understand that the Option Shares may not be registered under the Securities Act of 1933 (it being understood that the
Option Shares are being issued and sold in reliance on the exemption provided in Rule 701 thereunder) or any applicable state securities or “blue sky” laws and may not be sold or otherwise transferred or disposed of in the absence of an
effective registration statement under the Securities Act of 1933 and under any applicable state securities or “blue sky” laws (or exemptions from the registration requirement thereof). I further acknowledge that certificates representing
Option Shares will bear restrictive legends reflecting the foregoing and/or that book entries for uncertificated Option Shares will include similar restrictive notations. 

(vii) To the extent required, I have executed and delivered to the Company the Restricted Stock Agreement, attached as Appendix
C to the Agreement. 
 (viii) I have read and understand the Plan and acknowledge and agree that the Shares are subject to
all of the relevant terms of the Plan, including without limitation, the transfer restrictions set forth in Section 9 of the Plan. 

(ix) I understand and agree that the Company has a right of first refusal with respect to the Shares pursuant to
Section 9(b) of the Plan. 
 (x) I understand and agree that the Company has certain repurchase rights with respect to
the Shares pursuant to Section 9(c) of the Plan. 
 (xi) I understand and agree that I may not sell or otherwise
transfer or dispose of the Shares for a period of time following the effective date of a public offering by the Company as described in Section 9(f) of the Plan. 

 
	
	Sincerely yours,
	
	OPTIONEE:
	
	  

	Name:
	
	Address:
	
	  

	
	  

	
	  

 APPENDIX C 

RESTRICTED STOCK AGREEMENT FOR EARLY EXERCISE OF 

INCENTIVE STOCK OPTION 

UNDER THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 
  

			
	Optionee Name	  	 
	Date of Original Grant	  	 
	Date of Early Exercise Notice	  	 
	Number of Restricted Shares purchased herein	  	 
	Price paid per share	  	 
	Aggregate purchase price	  	 

 All capitalized terms used in this Restricted Stock Agreement for Early Exercise Option
(“Agreement”) and not otherwise defined shall have the respective meanings set forth in the ]Incentive Stock Option Agreement (including Exhibits thereto) between Zendesk, Inc. (the “Company”) and \ (\the “Optionee”
granting Optionee options (each, a “Stock Option”) to purchase shares of Series B Common Stock under the Zendesk, Inc. 2009 Stock Option and Grant Plan (the “Plan”), as amended by the Amendment to Stock Option Agreement signed by
the Optionee (collectively, the “Option Agreement”). 
 Upon signing this Agreement and delivering the Early Exercise Incentive
Stock Option Notice (“Exercise Notice”) to the Company, Company shall deliver to Optionee Underlying Shares subject to the following terms: 

1. Purchase and Sale of Shares; Vesting. 

(a) Purchase and Sale. The Company hereby sells to the Optionee, and the Optionee is purchasing from the Company, the number of Shares
set forth in the Stock Option Exercise Notice , pursuant to the Option Agreement, for the aggregate Option Exercise Price for the Underlying Shares so purchased. 

(b) Vesting. The risk of forfeiture shall lapse with respect to the Underlying Shares, and such Underlying Shares shall become vested,
on the respective dates indicated on the Vesting Schedule set forth in Exhibit A to the Option Agreement. Until they vest, the Underlying Shares shall be considered Shares of Restricted Stock (as defined in the Plan) for purposes of this Agreement
and the Plan. 
 2. Repurchase Right. Upon a Termination Event, the Company shall have the right to repurchase the Underlying Shares
of Restricted Stock that are unvested as of the date of such Termination Event as set forth in Section 9(c) of the Plan. 

 3. Restrictions on Transfer of Shares. The Underlying Shares (whether or not vested) may
not be sold, transferred or otherwise disposed of without the advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that the Underlying Shares may
be transferred without such consent (i) to a Permitted Transferee or upon death, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan, and (ii) following a Initial Public Offering. The Underlying
Shares (whether or not vested) shall be subject to certain transfer restrictions and other limitations including, without limitation, the provisions contained in Section 9 of the Plan. 

4. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Restricted Stock Agreement shall be subject to and
governed by all the terms and conditions of the Plan. 
 5. Miscellaneous Provisions. 

(a) Record Owner; Dividends. The Optionee and any Permitted Transferees, during the duration of this Agreement, shall be considered the
record owners of and shall be entitled to vote the Underlying Shares if and to the extent the Underlying Shares are entitled to voting rights. The Optionee and any Permitted Transferees shall be entitled to receive all dividends and any other
distributions declared on the Underlyiing Shares; provided, however, that the Company is under no duty to declare any such dividends or to make any such distribution. 

(b) Section 83(b) Election. The Optionee shall consult with the Optionee’s tax advisor to determine whether it would be
appropriate for the Optionee to make an election under Section 83(b) of the Code with respect to the Underlying Shares. Any such election must be filed with the Internal Revenue Service within 30 days of the date of exercise. If the Optionee
makes an election under Section 83(b) of the Code, the Optionee shall give prompt notice to the Company (and provide a copy of such election to the Company). 

(c) Equitable Relief. The parties hereto agree and declare that legal remedies may be inadequate to enforce the provisions of this
Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(d) Change and Modifications. This Agreement may not be orally changed, modified or terminated, nor shall any oral waiver of any of its
terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Optionee. 

(e) Governing Law. This Agreement shall be governed by and construed in accordance with the General Corporation Law of the State of
Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of California, without regard to conflict of law principles that would result in the application of
any law other than the law of the State of California. 

 (f) Headings. The headings are intended only for convenience in finding the subject matter
and do not constitute part of the text of this Agreement and shall not be considered in the interpretation of this Agreement. 
 (g)
Saving Clause. If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall in no manner affect the legality or enforceability of any other provision hereof. 

(h) Notices. All notices, requests, consents and other communications shall be in writing and be deemed given when delivered
personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the Optionee shall be addressed as set forth underneath their signatures below, or to
such other address or addresses as may have been furnished by such party in writing to the other. 
 (i) Benefit and Binding Effect.
This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their respective successors, assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become entitled
to all the rights of the Company hereunder to the extent of such assignment. 
 (j) Counterparts. For the convenience of the parties
and to facilitate execution, this Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 

6. Dispute Resolution. 

(a) Except as provided below, any dispute arising out of or relating to the Plan or the Shares, this Agreement, or the breach, termination or
validity of the Plan, the Shares or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the “J.A.M.S. Rules”).
The arbitration shall be governed by the United States Arbitration Act, 9 U.S.C. Sections 1 - 16, and judgment upon the award rendered by the arbitrators may be entered by any court having jurisdiction thereof. The place of arbitration shall be San
Francisco, California. 
 (b) The arbitration shall commence within 60 days of the date on which a written demand for arbitration is filed
by any party hereto. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party witnesses. In addition, each party may take up to three depositions as of
right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not have the power to order the answering of interrogatories or the response to requests for
admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven business days before the date of the arbitration, the identity of all persons that may testify at the arbitration and a copy
of all documents that may be introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and award shall be made and delivered within six months of the selection of the arbitrator. The
arbitrator’s decision shall set forth a 

 
reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of actual compensatory damages and shall not multiply actual
damages or award punitive damages, and each party hereby irrevocably waives any claim to such damages. 
 (c) The Company, the Optionee,
each party to the Agreement and any other holder of Shares issued pursuant to this Agreement (each, a “Party”) covenants and agrees that such party will participate in the arbitration in good faith. This Section 6 applies equally to
requests for temporary, preliminary or permanent injunctive relief, except that in the case of temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding immediate and
irreparable harm. 
 (d) Each Party (i) hereby irrevocably submits to the jurisdiction of any United States District Court of competent
jurisdiction for the purpose of enforcing the award or decision in any such proceeding, (ii) hereby waives, and agrees not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not
subject personally to the jurisdiction of the above named courts, that its property is exempt or immune from attachment or execution (except as protected by applicable law), that the suit, action or proceeding is brought in an inconvenient forum,
that the venue of the suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court, and (iii) hereby waives and agrees not to seek any review by any court of any other
jurisdiction which may be called upon to grant an enforcement of the judgment of any such court. Each Party hereby consents to service of process by registered mail at the address to which notices are to be given. Each Party agrees that its, his or
her submission to jurisdiction and its, his or her consent to service of process by mail is made for the express benefit of each other Party. Final judgment against any Party in any such action, suit or proceeding may be enforced in other
jurisdictions by suit, action or proceeding on the judgment, or in any other manner provided by or pursuant to the laws of such other jurisdiction. 

[SIGNATURE PAGE FOLLOWS] 

 The foregoing Restricted Stock Agreement is hereby accepted and the terms and conditions thereof
are hereby agreed to by the undersigned as of the date first above written. 
  

			
	ZENDESK, INC.
		
	By:	 	  

		 	Alan Black, Chief Financial Officer

 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, including, without limitation,
Section 9 thereof and understands that the Shares purchased hereby are subject to the terms of the Plan and this Agreement. This Agreement is hereby accepted, and the terms and conditions of the Plan, the Option Agreement and this Agreement,
SPECIFICALLY INCLUDING THE ARBITRATION PROVISIONS SET FORTH IN SECTION 6 OF THIS AGREEMENT, are hereby agreed to, by the undersigned as of the date first above written. 

 

	
	OPTIONEE:
	
	  

	Name:
	
	Address:
	
	  

	
	  

	
	  

 SPOUSE’S CONSENT1 

I acknowledge that I have read the foregoing Restricted Stock Agreement and understand the contents thereof. 

 

	
	  

	
	Name:

  
  

	1 	A spouse’s consent if the Optionee’s state of residence is one of the following community property states: Arizona, California, Idaho, Louisiana, New Mexico, Nevada, Texas, Washington and Wisconsin.

 APPENDIX D 

STOCK OPTION GRANT NOTICE 
  

					
	Name of Optionee:	  		  	
			
	No. of Underlying Shares	  	                 Shares of Series B Common Stock	  	
			
	Grant Date:	  	            , 2012	  	
			
	Expiration Date:	  	            , 2022	  	
			
	Vesting begins on:	  	            , 2012	  	
			
	Option Exercise Price/Share:	  	$0.        	  	

 Vesting Schedule: 

Subject to the determination of the Committee in its sole discretion to accelerate the vesting schedule hereunder, this Stock Option shall be vested with
respect to the Underlying Shares on the respective dates indicated below: 
 25% of the Underlying Shares are vested on:
            , 2013 
 2.0833% of the Underlying Shares are vested each month for 36
months beginning on             , 2013 
 so long as the Optionee maintains a Service
Relationship on each such date. 
 Notwithstanding anything in the Agreement to the contrary in the case of a Sale Event, this Stock Option
shall be treated as provided in Section 3(c) of the Plan. 

 RESTRICTED STOCK UNIT AWARD AGREEMENT 

UNDER THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 

Pursuant to the Zendesk, Inc. 2009 Stock Option and Grant Plan, as amended (the “Plan,” attached herein and marked
Appendix A), Zendesk, Inc., a Delaware corporation (together with any successor thereto, the “Company”), hereby grants to the undersigned grantee (the “Grantee”), an award of the number of Restricted Stock Units (an
“Award”) indicated on the Restricted Stock Unit Grant Notice (“Grant Notice,” attached herein and marked as Appendix B), subject to the terms and conditions set forth in this Restricted Stock Unit Award Agreement (this
“Agreement”) and in the Plan. Each Restricted Stock Unit shall relate to one share (a “Share”) of Series B Common Stock. 

All capitalized terms used herein and not otherwise defined shall have the respective meanings set forth in the Restricted Stock Unit Grant
Notice and the Plan. 
 1. Conditions and Vesting of Restricted Stock Units. The Restricted Stock Units are subject to both a
time-based condition (the “Time Condition”) and performance-based vesting (the “Performance Vesting”) described in paragraphs (a) and (b) below, both of which must be satisfied prior to the Expiration Date before the
Restricted Stock Units will be deemed vested and may be settled in accordance with Section 3 of this Agreement. 
 (a) Time
Condition. The Time Condition shall be satisfied in accordance with the Time-Based Vesting Schedule set forth in the Grant Notice. 

(b) Performance Vesting. The Restricted Stock Units shall only satisfy the Performance Vesting on the first to occur of
(i) immediately prior to a Sale Event or (ii) the completion of Company’s Initial Public Offering, in either case, occurring prior to the Expiration Date. 

(c) Vesting Date. Each date as of which both the Time Condition and Performance Vesting described in paragraphs (a) and
(b) have been satisfied with respect to any Restricted Stock Units shall be referred to as a “Vesting Date.” No Vesting Date shall occur after the Expiration Date. To the extent the Restricted Stock Units have not satisfied both the
Time Condition and the Performance Vesting, such Restricted Stock Units shall expire and be of no further force or effect on the Expiration Date. 

2. Termination of Service Relationship. If the Grantee’s Service Relationship with the Company terminates for any reason
(including death or disability) prior to the satisfaction of the Time Condition set forth in Section 1(a) above, any Restricted Stock Units that have not satisfied the Time Condition as of such date shall automatically and without notice
terminate and be forfeited, and neither the Grantee nor any of his or her successors, heirs, assigns, or personal representatives will thereafter have any further rights or interests in such forfeited Restricted Stock Units. Any Restricted Stock
Units that have satisfied the Time Condition as of such date shall remain subject to the Performance Vesting set forth in Section 1(b) above, but shall expire and be of no further force or effect on the first to occur of (a) three years
after the date on which the Grantee’s Service Relationship with the Company terminates, or (b) the Expiration Date. 

 3. Receipt of Shares of Stock. As soon as reasonably practicable following each Vesting
Date, but in no event later than March 15th of the year following the calendar year in which the Vesting Date occurs (the “Limit Date”), the Company shall issue to the Grantee the number of Shares equal to the aggregate number of
Restricted Stock Units that have satisfied the Time Condition and Performance Vesting pursuant to Section 1 of this Agreement and which have not been previously issued by the Company to the Grantee and the Grantee shall thereafter have all the
rights of a stockholder of the Company with respect to such Shares. Subject to the foregoing requirement to issue the Shares prior to the Limit Date, the Company generally expects to issue such Shares on a quarterly basis during the second month of
each quarter; provided, however, that this schedule could be modified based on certain securities law restrictions at the discretion of the Company. Notwithstanding the foregoing, in the event the Company completes an Initial Public Offering, the
Company reserves the right, but not the obligation, to withhold issuance of any Shares until after the termination of any lock-up period contemplated in the Plan or any contractual arrangement with the Company’s underwriters provided that the
Shares are delivered prior to the Limit Date. Grantee acknowledges and agrees that the anticipated issuance schedule is reasonably practicable for all purposes under this Agreement and the Plan. 

4. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Award shall be subject to and governed by all the terms
and conditions of the Plan. 
 5. Transfer Restrictions. 

(a) Award Not Transferrable. The Award may not be sold, transferred, pledged, assigned or otherwise encumbered or disposed of by the
Grantee. 
 (b) Beneficiary Designation. This Award is personal to the Grantee. The Grantee may elect to designate a beneficiary by
providing written notice of the name of such beneficiary to the Company and may revoke or change such designation at any time by filing written notice of revocation or change with the Company. Such beneficiary may be entitled to benefits under this
Award in the event of the death of the Grantee after a Vesting Date but before the settlement of this Award in accordance with the terms and conditions of this Award. If the Grantee does not designate a beneficiary, or if the designated beneficiary
predeceases the Grantee, the legal representative of the Grantee or the Grantee’s estate shall be the beneficiary. 
 (c)
Restrictions on Transfer of Shares. The Shares acquired upon settlement of the Restricted Stock Units may not be sold, transferred or otherwise encumbered or disposed of until (i) the Restricted Stock Units have vested as provided in
Section 1 of this Agreement; (ii) Shares have been issued to the Grantee in accordance with the terms of the Plan and this Agreement; and (iii) the Grantee has obtained the advance express written consent of the Company, which consent
may be given or denied in the Company’s sole and absolute discretion; provided, however, that the Grantee may transfer the Shares without such consent specified in this subparagraph (iii): (x) to a Permitted Transferee or upon the death of
the Grantee, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan, and (y) following an Initial Public Offering. In addition, the Shares shall be subject to certain additional transfer restrictions
and other limitations including, without limitation, the provisions contained in Section 9 of the Plan. 

 6. Tax Withholding. 

(a) Grantee Responsible for Tax-Related Items. Regardless of any action that the Company or the Grantee’s actual employer or a
Subsidiary or Affiliate of the Company with which the Grantee has a Service Relationship if the Grantee is a Consultant (the “Employer”) takes with respect to any or all income tax, social insurance, payroll tax, payment on account, or
other tax-related items related to the Grantee’s participation in the Plan and legally applicable to him or her (“Tax-Related Items”), the Grantee acknowledges that the ultimate liability for all Tax-Related Items is and remains the
Grantee’s responsibility and may exceed the amount actually withheld by the Company or the Employer. The Grantee further acknowledges that the Company and/or the Employer (i) make no representations or undertakings regarding the treatment
of any Tax-Related Items in connection with any aspect of the Restricted Stock Units, including, without limitation, the grant, vesting, or settlement of the Restricted Stock Units, the subsequent sale of Shares acquired pursuant to such issuance,
and the receipt of any dividends; and (ii) do not commit to and are under no obligation to structure the terms of the grant or any aspect of the Restricted Stock Units to reduce or eliminate the Grantee’s liability for Tax-Related Items or
achieve any particular tax result. The Grantee shall not make any claim against the Company or its Board of Directors, officers or employees related to Tax-Related Items arising from this Award or the Grantee’s other compensation. Furthermore,
if the Grantee has become subject to tax in more than one jurisdiction between the Grant Date and the date of any relevant taxable or tax withholding event, as applicable, the Grantee acknowledges that the Company and/or the Employer (or former
employer, as applicable) may be required to withhold or account for Tax-Related Items in more than one jurisdiction. 
 (b)
Withholding. The Grantee shall, not later than the date as of which the receipt or settlement of this Award becomes a taxable event for Federal income tax purposes, satisfy any Federal, state, and local taxes required by law to be withheld on
account of such taxable event. Such withholding shall be satisfied, in the Company’s sole discretion, (i) by the Company withholding from Shares to be issued to the Grantee a number of Shares with an aggregate Fair Market Value that would
satisfy the minimum withholding amount due; (ii) with respect to a Grantee who is not an executive officer or director of the Company nor subject to the reporting requirements of Section 16 of the Exchange Act at the time of such
withholding, by the Company causing its transfer agent to sell from the number of shares of Stock to be issued to the Grantee, the number of shares of Stock necessary to satisfy the Federal, state and local taxes required by law to be withheld from
the Grantee on account of such transfer; or (iii) by requiring the Grantee to pay to the Company, or make arrangements satisfactory to the Committee for payment of, the required tax withholding obligation. 

7. Section 409A of the Code. This Award is intended to constitute a “short term deferral” for purposes of
Section 409A of the Code to the greatest extent possible and the Award will be administered and interpreted in accordance with that intent. To the extent that any provision of this Agreement is ambiguous as to its exemption from
Section 409A of the Code, the provision shall be read in such a manner so that all payments hereunder are exempt from Section 409A of the Code. Solely for purposes of Section 409A of the Code, each issuance of Shares on (or shortly
following) a Vesting Date shall be considered a separate payment. The Company makes no representation or warranty and shall have no liability to the Grantee or any 

 
other person if any provisions of this Award are determined to constitute deferred compensation subject to Section 409A of the Code but do not satisfy an exemption from, or the conditions
of, such Section. 
 8. Miscellaneous Provisions. 

(a) Equitable Relief. The parties hereto agree and declare that legal remedies may be inadequate to enforce the provisions of this
Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(b) Adjustments for Changes in Capital Structure. If, as a result of any reorganization, recapitalization, reincorporation,
reclassification, stock dividend, stock split, reverse stock split or other similar change in the Series B Common Stock, the outstanding shares of Series B Common Stock are increased or decreased or are exchanged for a different number or kind of
securities of the Company, the restrictions contained in this Agreement shall apply with equal force to additional and/or substitute securities, if any, received by the Grantee in exchange for, or by virtue of his or her ownership of, this Award or
Shares acquired pursuant thereto. 
 (c) Change and Modifications. This Agreement may not be orally changed, modified or terminated,
nor shall any oral waiver of any of its terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Grantee. 

(d) Governing Law. This Agreement shall be governed by and construed in accordance with the General Corporation Law of the State of
Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of California, without regard to conflict of law principles that would result in the application of
any law other than the law of the State of California. 
 (e) Headings. The headings are intended only for convenience in finding the
subject matter and do not constitute part of the text of this Agreement and shall not be considered in the interpretation of this Agreement. 

(f) Saving Clause. If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall
in no manner affect the legality or enforceability of any other provision hereof. 
 (g) Notices. All notices, requests, consents and
other communications shall be in writing and be deemed given when delivered personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the Grantee
shall be addressed as set forth underneath their signatures below, or to such other address or addresses as may have been furnished by such party in writing to the other. 

(h) Benefit and Binding Effect. This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their
respective successors, permitted assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become entitled to all the rights of the Company hereunder to the extent of such assignment. 

 (i) Counterparts. For the convenience of the parties and to facilitate execution, this
Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 

(j) Integration. This Agreement constitutes the entire agreement between the parties with respect to this Award and supersedes all
prior agreements and discussions between the parties concerning such subject matter. 
 9. Dispute Resolution. 

(a) Except as provided below, any dispute arising out of or relating to the Plan or this Award, this Agreement, or the breach, termination or
validity of the Plan, this Award or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the “J.A.M.S. Rules”).
The arbitration shall be governed by the United States Arbitration Act, 9 U.S.C. Sections 1 16, and judgment upon the award rendered by the arbitrators may be entered by any court having jurisdiction thereof. The place of arbitration shall be San
Francisco, California. 
 (b) The arbitration shall commence within 60 days of the date on which a written demand for arbitration is filed
by any party hereto. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party witnesses. In addition, each party may take up to three depositions as of
right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not have the power to order the answering of interrogatories or the response to requests for
admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven business days before the date of the arbitration, the identity of all persons that may testify at the arbitration and a copy
of all documents that may be introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and award shall be made and delivered within six months of the selection of the arbitrator. The
arbitrator’s decision shall set forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of actual compensatory damages and shall not multiply actual damages or
award punitive damages, and each party hereby irrevocably waives any claim to such damages. 
 (c) The Company, the Grantee, each party to
the Agreement and any other holder of Shares issued pursuant to this Agreement (each, a “Party”) covenants and agrees that such party will participate in the arbitration in good faith. This Section 9 applies equally to requests for
temporary, preliminary or permanent injunctive relief, except that in the case of temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding immediate and irreparable harm.

 (d) Each Party (i) hereby irrevocably submits to the jurisdiction of any United States District Court of competent jurisdiction for
the purpose of enforcing the award or decision in any such proceeding, (ii) hereby waives, and agrees not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject
personally to the jurisdiction of the above named courts, that its property is exempt or immune from attachment or execution (except as protected by applicable law), that the suit, action or 

 
proceeding is brought in an inconvenient forum, that the venue of the suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such
court, and (iii) hereby waives and agrees not to seek any review by any court of any other jurisdiction which may be called upon to grant an enforcement of the judgment of any such court. Each Party hereby consents to service of process by
registered mail at the address to which notices are to be given. Each Party agrees that its, his or her submission to jurisdiction and its, his or her consent to service of process by mail is made for the express benefit of each other Party. Final
judgment against any Party in any such action, suit or proceeding may be enforced in other jurisdictions by suit, action or proceeding on the judgment, or in any other manner provided by or pursuant to the laws of such other jurisdiction. 

10. Acknowledgements of the Grantee. 

(a) The Grantee represents and agrees that the Shares to be acquired upon settlement of this Award will be acquired for investment, and not
with a view to the sale or distribution thereof. 
 (b) In the event that the sale or issuance of Shares under the Plan is not registered
under the Securities Act but an exemption is available that requires an investment representation or other representation, the Grantee shall represent and agree at the time of settlement of this Award resulting in the transfer of Shares that the
Shares being acquired are being acquired for investment, and not with a view to the sale or distribution thereof, and shall make such other representations as are deemed necessary or appropriate by the Company and its counsel. 

(c) Neither the Company nor any Subsidiary or Affiliate is obligated by or as a result of the Plan or this Agreement to continue the
Grantee’s Service Relationship, and neither the Plan nor this Agreement shall interfere in any way with the right of the Company or any Subsidiary or Affiliate to terminate the Service Relationship of the Grantee at any time. 

(d) The Granteee understands that the Shares may not be registered under the Securities Act of 1933 (it being understood that the Shares are
being issued and sold in reliance on the exemption provided in Rule 701 thereunder) or any applicable state securities or “blue sky” laws and may not be sold or otherwise transferred or disposed of in the absence of an effective
registration statement under the Securities Act of 1933 and under any applicable state securities or “blue sky” laws (or exemptions from the registration requirement thereof). 

(e) The Grantee understands and agree that he or she may not sell or otherwise transfer or dispose of the Shares for a period of time
following the effective date of a public offering by the Company as described in Section 9(f) of the Plan. 
 [SIGNATURE PAGE FOLLOWS]

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to
by the undersigned as of the date first above written. 
  

			
	ZENDESK, INC., San Francisco, CA
		
	By:	 	  

		 	Alan Black, CFO

 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, including, without limitation,
Section 9 thereof, and understands that the Award granted hereby is subject to the terms of the Plan and of this Agreement. 
 The undersigned also
hereby acknowledges and agrees that the Shares are subject to transfer restrictions as set forth in Section 5 of the Agreement. 
 This Agreement is
hereby accepted, and the terms and conditions thereof and of the Plan, SPECIFICALLY INCLUDING THE ARBITRATION PROVISIONS IN SECTION 9 OF THIS AGREEMENT, are hereby agreed to, by the undersigned as of the date first above written. 

 

			
	GRANTEE (Sign)	 	  

 
			
		
	Printed name:	 	  

 
			
		
	Address:	 	  

	
	  

 SPOUSE’S CONSENT (if Grantee’s state of residence is Arizona, California, Idaho, Louisiana, Nevada, New
Mexico, Texas, Washington or Wisconsin) 
 I acknowledge that I have read the foregoing Restricted Stock Unit Award Agreement and understand the
contents thereof. 
  

			
	Sign:	 	  

 DESIGNATED BENEFICIARY (if Grantee wishes to designate beneficiary): 

 

			
	Beneficiary Name:	 	  

			
		
	Address:	 	  

 APPENDIX A 

ZENDESK, INC. 2009 STOCK OPTION AND GRANT PLAN 

 APPENDIX B 

RESTRICTED STOCK UNIT GRANT NOTICE 
  

					
	Name of Grantee:	 	  
	 	
			
	No. of Restricted Stock Units	 	  
	 	
			
	Grant Date:	 	  
	 	
			
	Expiration Date:	 	  
	 	[seventh anniversary of Grant Date]
			
	Vesting Commencement Date:	 	  
	 	

 Time-Based Vesting Schedule: 

Subject to the determination of the Committee in its sole discretion to accelerate the vesting schedule hereunder: 

[25 percent] of the Restricted Stock Units shall satisfy the Time Condition on the first anniversary of the Vesting Commencement Date (the
“Initial Time Vesting Date”) provided that the Grantee continues to have a Service Relationship with the Company on the Initial Time Vesting Date 

[2.0833%] of the Restricted Stock Units shall satisfy the Time Condition each completed month for [36] months following the one-year anniversary
of the Vesting Commencement Date (each date, a “Time Vesting Date”), for so long as the Grantee continues to have a Service Relationship with the Company.  

Notwithstanding the foregoing, the Time Condition shall only be satisfied with respect to whole Restricted Stock Units and any rounding down to a
number of whole Restricted Stock Units shall correspondingly increase the number of Restricted Stock Units allocated to the [36th] Time Vesting Date.  

Notwithstanding anything in this Notice or the Agreement to the contrary, in the case of a Sale Event, this Award shall be treated as provided
in Section 3(c) of the Plan; provided that any Restricted Stock Units that have satisfied the Time Condition as of the consummation of such Sale Event shall either be assumed, continued or substituted for in accordance with
Section 3(c)(iii)(A) of the Plan or cancelled in exchange for a cash payment in accordance with Section 3(c)(iii)(C) of the Plan. [In addition, insert any special acceleration rights here.] 

Performance Vesting: As set forth in the Agreement. 

 STOCK OPTION AGREEMENT (AUSTRALIA) 

UNDER THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 

Pursuant to the Zendesk, Inc. 2009 Stock Option and Grant Plan, as amended (the “Plan,” attached herein and marked
Appendix A), Zendesk, Inc., a Delaware corporation (together with any successor thereto, the “Company”), hereby grants to the undersigned optionee (the “Optionee”), who is an employee of the Company or any of its
Subsidiaries, an option (the “Stock Option”) to purchase all or any part of the number of shares of Series B Common Stock, par value $0.01 per share (“Series B Common Stock”) of the Company indicated on the Stock Option Grant
Notice (“Grant Notice,” attached herein and marked Appendix C) (the “Underlying Shares”), at the exercise price per share indicated in the Grant Notice (the “Option Exercise Price”), by filing a Stock Option
Exercise Notice (“Exercise Notice”) in the form attached herein and marked Appendix B. Such Exercise Notice may be filed on or prior to the expiration date (“Expiration Date”) indicated in the Grant Notice, or such earlier
date as is specified herein, subject to the terms and conditions set forth in this Stock Option Agreement (this “Agreement”) and in the Plan. 

All capitalized terms used herein and not otherwise defined shall have the respective meanings set forth in the Grant Notice and the Plan.

 1. Vesting, Exercisability and Termination. 

(a) No portion of this Stock Option may be exercised until such portion shall have both (i) vested and (ii) become exercisable in
accordance with the terms herein. 
 (b) Subject to the determination of the Committee in its sole discretion to accelerate the vesting
schedule herein, the Stock Option shall vest in accordance with Part A of the Vesting Schedule set forth in the Grant Notice (“Part A”). 

(c) Except as set forth below, the Stock Option shall, to the extent the Stock Option is vested, become exercisable at the time set out in
Part B of the Vesting Schedule set forth in the Grant Notice (“Part B”). 
 (d) Termination. Except as may otherwise be
provided by the Committee, if the Optionee’s Service Relationship is terminated prior to the time this Stock Option becomes exercisable in accordance with Section 1(c) above, this Stock Option shall terminate immediately upon the date of
such termination and be null and void. Except as may otherwise be provided by the Committee, if the Optionee’s Service Relationship is terminated at a time when this Stock Option is both vested pursuant to Section 1(b) above and
exercisable pursuant to Section 1(c) above, the period within which to exercise this Stock Option will be subject to earlier termination as set forth below (and if not exercised within such period, shall thereafter terminate subject, in each
case, to Section 3(c) of the Plan): 

 (i) Termination Due to Death or Disability. If the Optionee’s Service
Relationship terminates by reason of such Optionee’s death or disability (as defined in Section 422(c) of the Code), at a time when this Stock Option is vested and exercisable pursuant to Section 1(b) and (c) above, this Stock
Option may continue to be exercised, by the Optionee, the Optionee’s legal representative or legatee for a period of 12 months from the date of death or disability (as defined in Section 422(c) of the Code) or until the Expiration Date, if
earlier. 
 (ii) Other Termination. If the Optionee’s Service Relationship terminates for any reason other than
death or disability (as defined in Section 422(c) of the Code) at a time when this Stock Option is vested and exercisable pursuant to Section 1(b) and (c) above, this Stock Option may continue to be exercised, for a period of up to 90
days from the date of termination or until the Expiration Date, if earlier; provided however, if the Optionee’s Service Relationship is terminated for Cause, this Stock Option shall terminate immediately upon the date of such
termination. 
 For purposes hereof, the Committee’s determination of the reason for termination of the Optionee’s Service
Relationship shall be conclusive and binding on the Optionee and his or her representatives or legatees. In addition, or purposes hereof, the Optionee’s Service Relationship will be considered terminated as of the date that the Optionee is no
longer actively providing services to the Company or any of its Subsidiaries (regardless of the reason for such termination and whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Optionee is
employed or the terms of the Optionee’s employment agreement, if any). Unless otherwise expressly provided in this Agreement or determined by the Company, (i) the Optionee’s right to vest in the Stock Option under the Plan, if any,
will terminate as of such date and will not be extended by any notice period (e.g., the Optionee’s period of service would not include any contractual notice period or any period of “garden leave” or similar period mandated
under employment laws in the jurisdiction where the Optionee is employed or the terms of the Optionee’s employment agreement, if any); the Committee. shall have the exclusive discretion to determine when the Optionee is no longer actively
providing services for purposes of his or her Stock Option grant (including whether the Optionee may still be considered to be providing services while on a leave of absence). 

2. Exercise of Stock Option. The Optionee may exercise this Stock Option to the extent it is vested and exercisable only in the
following manner: 
 (a) Prior to the Expiration Date, the Optionee may deliver an Exercise Notice indicating his or her election to
purchase some or all of the Underlying Shares. Such notice shall specify the number of Underlying Shares to be purchased. Payment of the purchase price may be made by one or more of the methods described in Section 5 of the Plan, subject to the
limitations contained in such Section of the Plan, including the requirement that the Committee specifically approve in advance certain payment methods. 

(b) Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be exercisable after the Expiration Date.

 3. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Stock
Option shall be subject to and governed by all the terms and conditions of the Plan. 
 4. Transferability of Stock Option. This
Stock Option is personal to the Optionee and is not transferable by the Optionee in any manner other than by will or by the laws of descent and distribution. The Stock Option may be exercised during the Optionee’s lifetime only by the Optionee
(or by the Optionee’s guardian or personal representative in the event of the Optionee’s incapacity). The Optionee shall not be permitted to designate a beneficiary. 

5. Restrictions on Transfer of Underlying Shares. The Underlying Shares acquired upon exercise of the Stock Option may not be sold,
transferred or otherwise disposed of without the advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that the Optionee may transfer the
Underlying Shares without such consent (i) to a Permitted Transferee or upon the death of the Optionee, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan, and (ii) following an Initial Public
Offering. In addition, such Underlying Shares (i) shall be subject to certain additional transfer restrictions and other limitations including, without limitation, the provisions contained in Section 9 of the Plan; and (ii) may not be
sold within 12 months of their date of issue unless one of the exemptions in sections 708(8), (10), (11) or (12) of the Corporations Act 2001 (Cth) applies to the sale or the sale does not require disclosure to investors
under Part 6D.2 of the Corporations Act 2001(Cth). 
 6. Miscellaneous Provisions. 

(a) Equitable Relief. The parties hereto agree and declare that legal remedies may be inadequate to enforce the provisions of this
Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(b) Adjustments for Changes in Capital Structure. If, as a result of any reorganization, recapitalization, reincorporation,
reclassification, stock dividend, stock split, reverse stock split or other similar change in the Series B Common Stock, the outstanding shares of Series B Common Stock are increased or decreased or are exchanged for a different number or kind of
securities of the Company, the restrictions contained in this Agreement shall apply with equal force to additional and/or substitute securities, if any, received by the Optionee in exchange for, or by virtue of his or her ownership of, this Stock
Option or Underlying Shares acquired pursuant thereto. 
 (c) Change and Modifications. This Agreement may not be orally changed,
modified or terminated, nor shall any oral waiver of any of its terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Optionee. 

(d) Governing Law. This Agreement shall be governed by and construed in accordance with the General Corporation Law of the State of
Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with 

 
the internal laws of California, without regard to conflict of law principles that would result in the application of any law other than the law of the State of California. 

(e) Headings. The headings are intended only for convenience in finding the subject matter and do not constitute part of the text of
this Agreement and shall not be considered in the interpretation of this Agreement. 
 (f) Saving Clause. If any provision(s) of this
Agreement shall be determined to be illegal or unenforceable, such determination shall in no manner affect the legality or enforceability of any other provision hereof. 

(g) Notices. All notices, requests, consents and other communications shall be in writing and be deemed given when delivered
personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the Optionee shall be addressed as set forth underneath their signatures below, or to
such other address or addresses as may have been furnished by such party in writing to the other. 
 (h) Benefit and Binding Effect.
This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their respective successors, permitted assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become
entitled to all the rights of the Company hereunder to the extent of such assignment. 
 (i) Counterparts. For the convenience of the
parties and to facilitate execution, this Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 

(j) Integration. This Agreement constitutes the entire agreement between the parties with respect to this Stock Option and supersedes
all prior agreements and discussions between the parties concerning such subject matter. 
 7. Dispute Resolution. 

(a) Except as provided below, any dispute arising out of or relating to the Plan or this Stock Option, this Agreement, or the breach,
termination or validity of the Plan, this Stock Option or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the
“J.A.M.S. Rules”). The arbitration shall be governed by the United States Arbitration Act, 9 U.S.C. Sections 1 16, and judgment upon the award rendered by the arbitrators may be entered by any court having jurisdiction thereof. The place
of arbitration shall be San Francisco, California. 
 (b) The arbitration shall commence within 60 days of the date on which a written
demand for arbitration is filed by any party hereto. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party witnesses. In addition, each party may
take up to three depositions as of right, and the arbitrator may in his or her discretion allow additional depositions upon good 

 
cause shown by the moving party. However, the arbitrator shall not have the power to order the answering of interrogatories or the response to requests for admission. In connection with any
arbitration, each party to the arbitration shall provide to the other, no later than seven business days before the date of the arbitration, the identity of all persons that may testify at the arbitration and a copy of all documents that may be
introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and award shall be made and delivered within six months of the selection of the arbitrator. The arbitrator’s decision shall
set forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of actual compensatory damages and shall not multiply actual damages or award punitive damages, and each
party hereby irrevocably waives any claim to such damages. 
 (c) The Company, the Optionee, each party to the Agreement and any other
holder of Underlying Shares issued pursuant to this Agreement (each, a “Party”) covenants and agrees that such party will participate in the arbitration in good faith. This Section 7 applies equally to requests for temporary,
preliminary or permanent injunctive relief, except that in the case of temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding immediate and irreparable harm. 

(d) Each Party (i) hereby irrevocably submits to the jurisdiction of any United States District Court of competent jurisdiction for the
purpose of enforcing the award or decision in any such proceeding, (ii) hereby waives, and agrees not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject personally
to the jurisdiction of the above named courts, that its property is exempt or immune from attachment or execution (except as protected by applicable law), that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the
suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court, and (iii) hereby waives and agrees not to seek any review by any court of any other jurisdiction which may be
called upon to grant an enforcement of the judgment of any such court. Each Party hereby consents to service of process by registered mail at the address to which notices are to be given. Each Party agrees that its, his or her submission to
jurisdiction and its, his or her consent to service of process by mail is made for the express benefit of each other Party. Final judgment against any Party in any such action, suit or proceeding may be enforced in other jurisdictions by suit,
action or proceeding on the judgment, or in any other manner provided by or pursuant to the laws of such other jurisdiction. 
 8. Nature
of Grant. In accepting the Stock Option, the Optionee acknowledges, understands and agrees that: 
 (a) the Plan is established
voluntarily by the Company, it is discretionary in nature, and may be amended, suspended or terminated by the Company at any time, to the extent permitted by the Plan; 

(b) the grant of the Stock Option is voluntary and occasional and does not create any contractual or other right to receive future grants of
stock options, or benefits in lieu of stock options, even if stock options have been granted in the past; 

 (c) all decisions with respect to future Stock Option or other grants, if any, will be at the
sole discretion of the Company; 
 (d) the Optionee is voluntarily participating in the Plan; 

(e) the Stock Option and any Underlying Shares acquired under the Plan are not intended to replace any pension rights or compensation; 

(f) the Stock Option and any Underlying Shares acquired under the Plan, and the income and value of same, are not part of normal or expected
compensation for any purposes, including, but not limited, calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses, long-service awards, pension or retirement or welfare benefits or similar
payments; 
 (g) the future value of the Underlying Shares is unknown, indeterminable, and cannot be predicted with certainty; 

(h) if the Underlying Shares do not increase in value, the Stock Option will have no value; 

(i) if the Optionee exercises the Stock Option and acquires Underlying Shares, the value of such Underlying Shares may increase or decrease in
value, even below the Option Exercise Price; 
 (j) no claim or entitlement to compensation or damages shall arise from forfeiture of the
Stock Option resulting from the termination of the Optionee’s Service Relationship (for any reason whatsoever, whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Optionee is employed or the
terms of the Optionee’s employment agreement, if any), and in consideration of the grant of the Stock Option to which the Optionee is otherwise not entitled, the Optionee irrevocably agrees never to institute any claim against the Company or
any of its Subsidiaries, waives his or her ability, if any, to bring any such claim, and releases the Company and its Subsidiaries from any such claim; if, notwithstanding the foregoing, any such claim is allowed by a court of competent
jurisdiction, then, by participating in the Plan, the Optionee shall be deemed irrevocably to have agreed not to pursue such claim and agrees to execute any and all documents necessary to request dismissal or withdrawal of such claim; 

(k) unless otherwise provided in the Plan or by the Company in its discretion, the Stock Option and the benefits evidenced by this Agreement
do not create any entitlement to have the Stock Option or any such benefits transferred to, or assumed by, another company nor to be exchanged, cashed out or substituted for, in connection with any corporate transaction affecting the shares of the
Company; and 
 (l) neither the Company nor any of its Subsidiaries shall not be liable for any foreign exchange rate fluctuation between
the Optionee’s local currency and the United States Dollar that may affect the value of the Stock Option or of any amounts due to the Optionee pursuant to the exercise of the Stock Option or the subsequent sale of any Underlying Shares acquired
upon exercise. 

 9. Data Privacy. The Optionee hereby explicitly and unambiguously
consents to the collection, use and transfer, in electronic or other form, of the Optionee’s personal data as described in this Agreement and any other Stock Option grant materials (“Data”) by and among the Company and its
Subsidiaries for the exclusive purpose of implementing, administering and managing the Optionee’s participation in the Plan.

The Optionee understands that the Company and its Subsidiaries may hold certain personal information about the Optionee, including, but
not limited to, the Optionee’s name, home address and telephone number, date of birth, social insurance number or other identification number, salary, nationality, job title, any shares of stock or directorships held in the Company, details of
all stock options or any other entitlement to shares of stock awarded, canceled, exercised, vested, unvested or outstanding in the Optionee’s favor, for the exclusive purpose of implementing, administering and managing the Plan.

The Optionee understands that Data will be transferred to a third party stock plan service provider as may be selected by the Company in
the future, which is assisting the Company with the implementation, administration and management of the Plan. The Optionee understands that recipients of the Data may be located in the United States or elsewhere, and that the recipient’s
country (e.g., the United States) may have different data privacy laws and protections than the Optionee’s country. The Optionee understands that he or she may request a list with the names and addresses of any potential recipients of the
Data by contacting his or her local human resources representative. The Optionee authorizes the Company, the chosen third party stock plan service provider and any other possible recipients which may assist the Company (presently or in the
future) with implementing, administering and managing the Plan to receive, possess, use, retain and transfer the Data, in electronic or other form, for the sole purposes of implementing, administering and managing the Optionee’s participation
in the Plan. The Optionee understands that Data will be held only as long as is necessary to implement, administer and manage the Optionee’s participation in the Plan. The Optionee understands that he or she may, at any time, view
Data, request additional information about the storage and processing of Data, require any necessary amendments to Data or refuse or withdraw the consents herein, in any case without cost, by contacting in writing his or her local human resources
representative. Further, the Optionee understands that he or she is providing the consents herein on a purely voluntary basis. If the Optionee does not consent, or if the Optionee later seeks to revoke his or her consent, his or
her employment status or service and career with the Company or any of its Subsidiaries will not be adversely affected; the only adverse consequence of refusing or withdrawing the Optionee’s consent is that the Company would not be able to
grant the Optionee Stock Options or other equity awards or administer or maintain such awards. Therefore, the Optionee understands that refusing or withdrawing his or her consent may affect the Optionee’s ability to participate in the
Plan. For more information on the consequences of the Optionee’s refusal to consent or withdrawal of consent, the Optionee understands that he or she may contact his or her local human resources representative. 

[SIGNATURE PAGE FOLLOWS] 

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to
by the undersigned as of the date first above written. 
  

			
	ZENDESK, INC., San Francisco, CA
		
	By:	 	  

		 	Alan Black, CFO

 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, including, without limitation,
Section 9 thereof, and understands that the Stock Option granted hereby is subject to the terms of the Plan and of this Agreement. 
 The undersigned
also hereby acknowledges and agrees that the Underlying Shares are subject to transfer restrictions as set forth in Section 5 of the Agreement. 
 This
Agreement is hereby accepted, and the terms and conditions thereof and of the Plan, SPECIFICALLY INCLUDING THE ARBITRATION PROVISIONS IN SECTION 7 OF THIS AGREEMENT, are hereby agreed to, by the undersigned as of the date first above written. 

 

			
	OPTIONEE (Sign)	 	  

 
			
		
	 Printed name:
	 	 

 
			
		
	 Address:
	 	 
	
	 

 APPENDIX A 

ZENDESK, INC. 2009 STOCK OPTION AND GRANT PLAN 

 APPENDIX B 

STOCK OPTION EXERCISE NOTICE 
 To:
Zendesk, Inc., attention Chief Financial Officer 
 Pursuant to the terms of my stock option agreement(s) between the undersigned and
Zendesk, Inc. (the “Company”) under the Zendesk, Inc. 2009 Stock Option and Grant Plan, I hereby exercise such option by including herein payment in the form of a personal check representing the purchase price for the Underlying Shares.

  

											
		 	 Name of Optionee:	 	  
	 		  	Today’s Date	  	  

  

											
	 	  	# of
Underlying
Shares	  	Option
Exercise
Price per
Share	 	  	Extended
exercise
price	 
	 Number of Underlying Shares in respect of which option originally granted on ______, 20___
	  		  	$	 	  	  			
	  
 (if multiple options are
involved, please list separately)
	  		  				  			
				
	 Number of Underlying Shares I am purchasing on exercise of vested and exercisable option
	  		  	$	 	  	  	$	 	  
				
	 Payment to Zendesk
	  		  				  	$	 	  

 In connection with my exercise of the option as set forth above, I hereby represent and warrant to the Company as follows:

 (i) I am purchasing the Underlying Shares for my own account for investment only, and not for resale or with a view to
the distribution thereof. 
 (ii) I have had such an opportunity as I have deemed adequate to obtain from the Company such
information as is necessary to permit me to evaluate the merits and risks of my 

 
investment in the Company and have consulted with my own advisers with respect to my investment in the Company, including tax advisers with regards to any tax implications. 

(iii) I have sufficient experience in business, financial and investment matters to be able to evaluate the risks involved in
the purchase of the Underlying Shares and to make an informed investment decision with respect to such purchase. 
 (iv) I
can afford a complete loss of the value of the Underlying Shares and am able to bear the economic risk of holding such Underlying Shares for an indefinite period of time. 

(v) I understand that the shares of Series B Common Stock that I acquire upon exercise of the Options (using Appendix B)
as well as any shares of Series A Common Stock and Series B Common Stock that I have previously purchased, been granted, or that are subject to other awards made to me under the Plan, may not be sold, transferred or otherwise disposed of without the
advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that I may transfer any such shares without such consent (i) to a Permitted Transferee
(as defined in the Plan) or upon my death, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan, and (ii) subject to the other transfer restrictions as set forth in Section 9 of the Plan, upon an
Initial Public Offering. Notwithstanding the foregoing exceptions, I acknowledge and agree that any Underlying Shares may not be sold within 12 months of their date of issue unless one of the exemptions in sections 708(8), (10), (11) or
(12) of the Corporations Act 2001 (Cth) applies to the sale or the sale does not require disclosure to investors under Part 6D.2 of the Corporations Act 2001(Cth). 

(vi) I understand that the Underlying Shares may not be registered under the Securities Act of 1933 (it being understood that
the Underlying Shares are being issued and sold in reliance on the exemption provided in Rule 701 thereunder) or any applicable state securities or “blue sky” laws and may not be sold or otherwise transferred or disposed of in the absence
of an effective registration statement under the Securities Act of 1933 and under any applicable state securities or “blue sky” laws (or exemptions from the registration requirement thereof). I further acknowledge that certificates
representing Underlying Shares will bear restrictive legends reflecting the foregoing and/or that book entries for uncertificated Underlying Shares will include similar restrictive notations. 

(vii) I have read and understand the Plan and acknowledge and agree that the Underlying Shares are subject to all of the
relevant terms of the Plan, including without limitation, the transfer restrictions set forth in Section 9 of the Plan. 

(viii) I understand and agree that the Company has a right of first refusal with respect to the Underlying Shares pursuant to
Section 9(b) of the Plan. 
 (ix) I understand and agree that the Company has certain repurchase rights with respect to
the Underlying Shares pursuant to Section 9(c) of the Plan. 
 (x) I understand and agree that I may not sell or
otherwise transfer or dispose of the Underlying Shares for a period of time following the effective date of a public offering by the Company as described in Section 9(f) of the Plan. 

 
	
	Sincerely yours,
	
	OPTIONEE:
	
	  

	Name:
	
	Address:
	
	  

	
	  

	
	  

 APPENDIX C 

STOCK OPTION GRANT NOTICE 
  

			
	Name of Optionee:	  	_____________________________________________    
		
	No. of Underlying Shares	  	_______________ Shares of Series B Common Stock
		
	Grant Date:	  	___________________________, 201___
		
	Expiration Date:	  	___________________________, 202___  [business day prior to seventh anniversary of Grant Date]
		
	Vesting begins on:	  	___________________________, 201___  (Vesting Commencement Date)
		
	Option Exercise Price/Share:	  	$0.__________

 Vesting Schedule: 

Part A 
 Subject to the determination of the Committee in
its sole discretion to accelerate the vesting schedule hereunder, this Stock Option shall be vested with respect to the Underlying Shares on the respective dates indicated below: 

(a) 25% of the Underlying Shares shall vest on the first anniversary of the Vesting Commencement Date; and 

(b) 2.0833% of the Underlying Shares shall vest each completed month for 36 months following the first anniversary of the Vesting Commencement Date, 

so long as the Optionee maintains a Service Relationship on each such date. 

Part B 
 This Stock Option shall become exercisable with
respect to Underlying Shares which have vested in accordance with Part A of this Vesting Schedule, at the later of the following times: 

	(a)	the date such Underlying Shares have vested in accordance with Part A of this Vesting Schedule; and 

  

	(b)	the earlier to occur of the following: 

  

	 	(i)	the beginning of the specified period of time prior to the consummation of a Sale Event as determined by the Committee in accordance with Section 3(c)(i)(B) of the Plan; and 

 

	 	(ii)	that date following an Initial Public Offering when the transfer restrictions contemplated under Section 9(f) of the Plan shall have terminated. 

provided, however, that, after the occurrence of one of the events described in clause (b), any portion of the Stock Option that would subsequently otherwise
first be exercisable pursuant to clause (a), shall nevertheless not become exercisable until the expiration of any Company imposed trading blackout or restrictions applicable to Optionee in effect at such time as such portion of the Stock Option
would otherwise have become exercisable and provided, however, that the Stock Option shall nevertheless not become exercisable until the Fair Market Value of the Underlying Shares is higher than the Option Exercise Price for a period of at least
five (5) consecutive business days. 
 Notwithstanding anything in the Agreement to the contrary, in the case of a Sale Event, this Stock Option shall
be treated as provided in Section 3(c) of the Plan. 

 RESTRICTED STOCK UNIT AWARD AGREEMENT 

UNDER THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 

(DENMARK) 
 Pursuant to the
Zendesk, Inc. 2009 Stock Option and Grant Plan, as amended (the “Plan,” attached herein and marked Appendix A), Zendesk, Inc., a Delaware corporation (together with any successor thereto, the “Company”), hereby grants
to the undersigned grantee (the “Grantee”), an award of the number of Restricted Stock Units (an “Award”) indicated on the Restricted Stock Unit Grant Notice (“Grant Notice,” attached herein and marked as
Appendix B), subject to the terms and conditions set forth in this Restricted Stock Unit Award Agreement (this “Agreement”) and in the Plan. Each Restricted Stock Unit shall relate to one share (a “Share”) of
Series B Common Stock. 
 All capitalized terms used herein and not otherwise defined shall have the respective meanings set forth in
the Grant Notice and the Plan. 
 1. Conditions and Vesting of Restricted Stock Units. The Restricted Stock Units are subject to both
a time-based condition (the “Time Condition”) and performance-based vesting (the “Performance Vesting”) described in paragraphs (a) and (b) below, both of which must be satisfied prior to the Expiration Date before the
Restricted Stock Units will be deemed vested and may be settled in accordance with Section 3 of this Agreement. 
 (a) Time
Condition. The Time Condition shall be satisfied in accordance with the Time-Based Vesting Schedule set forth in the Grant Notice. 

(b) Performance Vesting. The Restricted Stock Units shall only satisfy the Performance Vesting on the first to occur of
(i) immediately prior to a Sale Event or (ii) the completion of Company’s Initial Public Offering, in either case, occurring prior to the Expiration Date. 

(c) Vesting Date. Each date as of which both the Time Condition and Performance Vesting described in paragraphs (a) and
(b) have been satisfied with respect to any Restricted Stock Units shall be referred to as a “Vesting Date.” No Vesting Date shall occur after the Expiration Date. To the extent the Restricted Stock Units have not satisfied both the
Time Condition and the Performance Vesting, such Restricted Stock Units shall expire and be of no further force or effect on the Expiration Date. 

2. Termination of Service Relationship. All relevant clauses in the Plan describing and/or describing vesting and/or termination will
apply to the Grantee and grant of Restricted Stock Units under this Agreement, however such clauses in the Plan will be subordinated to obligatory regulation regarding vesting and termination in the Danish Act on the Use of Rights to Purchase or
Subscribe for Shares etc. in Employment Relationships (in Danish “aktieoptionsloven”) (the “Stock Option Act”). 
 For
purposes of the foregoing, the Grantee’s Service Relationship will be considered terminated as of the date the Grantee is no longer actively providing services to the Company or 

 
any Subsidiary (regardless of the reason for such termination and whether or not later to be found invalid or in breach of employment laws in the jurisdiction where the Grantee is employed or the
terms of the Grantees’s employment agreement, if any). Unless otherwise determined by the Company, the Grantee’s right to vest in the Restricted Stock Units under the Plan, if any, will terminate as of such date and will not be extended by
any notice period (e.g., the Grantee’s period of service would not include any contractual notice period or any period of “garden leave” or similar period mandated under employment laws in the jurisdiction where the Grantee is
employed or the terms of the Grantee’s employment agreement, if any). The Committee shall have the exclusive discretion to determine when the Grantee is no longer actively providing services for purposes of the Restricted Stock Unit grant
(including whether the Grantee may still be considered to be providing services while on a leave of absence). 
 (a) Subject to
Section 2(b), if the Grantee’s Service Relationship terminates for any reason (including death) prior to the satisfaction of the Time Condition set forth in Section 1(a) above, any Restricted Stock Units that have not satisfied the
Time Condition as of such date shall automatically and without notice terminate and be forfeited, and neither the Grantee nor any of his or her successors, heirs, assigns, or personal representatives will thereafter have any further rights or
interests in such forfeited Restricted Stock Units. Subject to Section 2(b), any Restricted Stock Units that have satisfied the Time Condition as of such date shall remain subject to the Performance Vesting set forth in Section 1(b) above,
but shall expire and be of no further force or effect on the first to occur of (a) three years after the date on which the Grantee’s Service Relationship terminates, or (b) the Expiration Date. 

(b) Due to the Stock Option Act the following shall apply if any of the following occurs: (i) Grantee’s Service Relationship is
terminated by the Company or a Subsidiary at which Grantee is employed and such termination is not caused by breach of an employment contract by the Grantee (ii) the Grantee terminates the employment due to the Company’s or a
Subsidiary’s material breach of Grantee’s employment contract, or (iii) Grantee’s employment terminates because the Grantee reaches the mandatory age of retirement for employees in the Company or a Subsidiary at which Grantee is
employed or because Grantee is entitled to receive old-age pension from the Danish state, the Company, or a Subsidiary at which Grantee is employed, then the Restricted Stock Units granted herein shall remain available on unchanged terms as if the
Grantee had still been employed. Therefore if any of the above occurs when interpreting other provisions in this Agreement, the Grantee shall be considered still employed. Also, the Grantee shall be entitled to future grants of Restricted Stock
Units proportionate to the number the Grantee would have been entitled according to Agreement or custom, had the Grantee still been employed at the end of the accounting year during which Grantee’s Service Relationship was terminated. 

For purposes hereof, the Committee’s determination of the reason for termination of the Grantee’s Service Relationship shall be conclusive and
binding on the Grantee and his or her representatives or legatees. 
 3. Receipt of Shares of Stock. 

(a) Subject to Section 3(b), as soon as reasonably practicable following each Vesting Date, the Company shall issue to the Grantee the
number of Shares equal to the aggregate number of Restricted Stock Units that have satisfied the Time Condition and Performance Vesting pursuant to Section 1 of this Agreement and which have not been

 
previously issued by the Company to the Grantee and the Grantee shall thereafter have all the rights of a stockholder of the Company with respect to such Shares. 

(b) If the shares underlying the Restricted Stock Units are publicly traded, the Company may elect to deliver cash wholly or partly in lieu of
the Shares to be issued in connection with Section 3(a) above. If the Company chooses to deliver cash wholly or partly in lieu of the Shares to be issued in connection with Section 3(a) above (such Shares, the “Withheld Shares”),
the Company shall deliver an amount of cash corresponding to the value of the Withheld Shares, as calculated based on the average closing price per share for the five (5) trading days immediately preceding the relevant Vesting Date. 

4. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Award shall be subject to and governed by all the terms
and conditions of the Plan. 
 5. Transfer Restrictions. 

(a) Award Not Transferrable. The Award may not be sold, transferred, pledged, assigned or otherwise encumbered or disposed of by the
Grantee. 
 (b) Beneficiary Designation. This Award is personal to the Grantee and the Grantee shall not be permitted to designate a
beneficiary. In the event of the Grantee’s death after a Vesting Date but before the settlement of this Award in accordance with the terms and conditions of this Award, the legal representative of the Grantee or the Grantee’s estate shall
be the beneficiary entitled to the benefits under this Award. 
 (c) Restrictions on Transfer of Shares. The Shares acquired upon
settlement of the Restricted Stock Units may not be sold, transferred or otherwise encumbered or disposed of until (i) the Restricted Stock Units have vested as provided in Section 1 of this Agreement; (ii) Shares have been issued to
the Grantee in accordance with the terms of the Plan and this Agreement; and (iii) the Grantee has obtained the advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute
discretion; provided, however, that the Grantee may transfer the Shares without such consent specified in this subparagraph (iii): (x) to a Permitted Transferee or upon the death of the Grantee, in accordance with the terms and conditions of
Section 9(a)(ii)(A) and (B) of the Plan, and (y) following an Initial Public Offering. In addition, the Shares shall be subject to certain additional transfer restrictions and other limitations including, without limitation, the
provisions contained in Section 9 of the Plan. 
 6. Grantee Responsible for Tax-Related Items. Regardless of any action that
the Company or the Grantee’s actual employer (the “Employer”) takes with respect to any or all income tax, social insurance, payroll tax, payment on account, or other tax-related items related to the Grantee’s participation in
the Plan and legally applicable to him or her (“Tax-Related Items”), the Grantee acknowledges that the ultimate liability for all Tax-Related Items is and remains the Grantee’s responsibility and may exceed the amount actually
withheld by the Company or the Employer. The Grantee further acknowledges that the Company and/or the Employer (i) make no representations or undertakings regarding the treatment of any Tax-Related Items in connection with any aspect of the
Restricted Stock Units, including, without limitation, the grant, vesting, or settlement of the Restricted Stock Units, the subsequent sale of Shares acquired pursuant to such issuance, and the receipt of any dividends; and (ii) do not

 
commit to and are under no obligation to structure the terms of the grant or any aspect of the Restricted Stock Units to reduce or eliminate the Grantee’s liability for Tax-Related Items or
achieve any particular tax result. The Company or Employer may satisfy all Tax-Related Items for which they have the obligation or authority to withhold or remit payment, in their sole discretion, (i) by withholding from Shares to be issued to
the Grantee upon settlement of the Award; (ii) with respect to a Grantee who is not an executive officer or director of the Company nor subject to the reporting requirements of Section 16 of the Exchange Act at the time of such
withholding, by the Company causing its transfer agent to sell from the number of Shares to be issued to the Grantee, the number of Shares necessary to satisfy the applicable Tax Related Items; or (iii) by requiring the Grantee to pay to the
Company or Employer, or make arrangements satisfactory to the Committee for payment of, the required Tax Related Item. The Grantee shall not make any claim against the Employer, the Company or its Board of Directors, officers, affiliates or
employees related to Tax-Related Items arising from this Award or the Grantee’s other compensation. Furthermore, if the Grantee has become subject to tax in more than one jurisdiction between the Grant Date and the date of any relevant taxable
or tax withholding event, as applicable, the Grantee acknowledges that the Company and/or the Employer (or former employer, as applicable) may be required to withhold or account for Tax-Related Items in more than one jurisdiction. 

Depending on the withholding method, the Company may withhold or account for Tax-Related Items by considering applicable minimum statutory
withholding rates or other applicable withholding rates, including maximum applicable rates, in which case the Grantee will receive a refund of any over-withheld amount in cash and will have no entitlement to the Series B Common Stock equivalent. If
the obligation for Tax-Related Items is satisfied by withholding in Shares, for tax purposes, the Grantee will be deemed to have been issued the full number of Shares subject to the vested Restricted Stock Units, notwithstanding that a number of the
Shares are held back solely for the purpose of paying the Tax-Related Items. The Company may refuse to issue or deliver the Shares or the proceeds of the sale of Shares if the Grantee fails to comply with his or her obligations in connection with
the Tax-Related Items. 
 7. Miscellaneous Provisions. 

(a) Equitable Relief. The parties hereto agree and declare that legal remedies may be inadequate to enforce the provisions of this
Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(b) Adjustments for Changes in Capital Structure. If, as a result of any reorganization, recapitalization, reincorporation,
reclassification, stock dividend, stock split, reverse stock split or other similar change in the Series B Common Stock, the outstanding shares of Series B Common Stock are increased or decreased or are exchanged for a different number or kind of
securities of the Company, the restrictions contained in this Agreement shall apply with equal force to additional and/or substitute securities, if any, received by the Grantee in exchange for, or by virtue of his or her ownership of, this Award or
Shares acquired pursuant thereto. 
 (c) Change and Modifications. This Agreement may not be orally changed, modified or terminated,
nor shall any oral waiver of any of its terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Grantee. 

 (d) Governing Law. To the extent certain Danish laws supersede the terms of this
Agreement, either due to its provisions, legal precedence, or the laws governing the employment relationship among the Grantee and Employer, this Agreement and grant of Restricted Stock Units according to the Plan shall accordingly be governed by
and construed in accordance with such Danish laws. 
 Subject to the foregoing limitations in this Section 7(d), the following will apply: 

(i) Except as provided below, any dispute arising out of or relating to the Plan, this Agreement, or the breach, termination or validity of
the Plan or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the “J.A.M.S. Rules”). The arbitration shall be
governed by the United States Arbitration Act, 9 U.S.C. Sections 1 16, and judgment upon the award rendered by the arbitrators may be entered by any court having jurisdiction thereof. The place of arbitration shall be San Francisco, California. 

(ii) The arbitration shall commence within sixty (60) days of the date on which a written demand for arbitration is filed by any party
to this Agreement. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party witnesses. In addition, each party may take up to three depositions as of
right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not have the power to order the answering of interrogatories or the response to requests for
admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven (7) business days before the date of the arbitration, the identity of all persons that may testify at the arbitration
and a copy of all documents that may be introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and award shall be made and delivered within six months of the selection of the
arbitrator. The arbitrator’s decision shall set forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of actual compensatory damages and shall not multiply actual
damages or award punitive damages, and each party hereby irrevocably waives any claim to such damages. 
 (iii) The Company and the Grantee
(each being a party to the Agreement), and any other holder of Shares issued pursuant to this Agreement (each, a “Party”) covenants and agrees that such Party will participate in the arbitration in good faith. This Section 7 applies
equally to requests for temporary, preliminary or permanent injunctive relief, except that in the case of temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding
immediate and irreparable harm. 
 (iv) Each Party (A) hereby irrevocably submits to the jurisdiction of the United States District
Court in San Francisco County, California for the purpose of enforcing the award or decision in any such proceeding, (B) hereby waives, and agrees not to assert to the greatest degree allowed by applicable law (including any Danish law), by way
of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject personally to the jurisdiction of the above named courts, that its property is exempt or immune from attachment or execution (except as
protected by applicable law), that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the suit, action or proceeding is 

 
improper or that this Agreement or the subject matter hereof may not be enforced in or by such court, and (C) hereby waives and agrees not to seek, to the greatest degree allowed by any
applicable law (including any Danish law) any review by any court of any other jurisdiction which may be called upon to grant an enforcement of the judgment of any such court. Each Party hereby consents to service of process by registered mail at
the address to which notices are to be given. Each Party agrees that its, his or her submission to jurisdiction and its, his or her consent to service of process by mail is made for the express benefit of all Parties and is essential to the overall
purpose of this Agreement. Final judgment against any Party in any such action, suit or proceeding may be enforced in other jurisdictions by suit, action or proceeding on the judgment, or in any other manner provided by or pursuant to the laws of
such other jurisdiction. 
 (e) Headings. The headings are intended only for convenience in finding the subject matter and do not
constitute part of the text of this Agreement and shall not be considered in the interpretation of this Agreement. 
 (f) Saving
Clause. If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall in no manner affect the legality or enforceability of any other provision hereof. 

(g) Notices. All notices, requests, consents and other communications shall be in writing and be deemed given when delivered
personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the Grantee shall be addressed as set forth underneath their signatures below, or to
such other address or addresses as may have been furnished by such party in writing to the other. 
 (h) Benefit and Binding Effect.
This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their respective successors, permitted assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become
entitled to all the rights of the Company hereunder to the extent of such assignment. 
 (i) Counterparts. For the convenience of the
parties and to facilitate execution, this Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 

(j) Integration. This Agreement constitutes the entire agreement between the parties with respect to this Award and supersedes all
prior agreements and discussions between the parties concerning such subject matter. 
 8. Acknowledgements of the Grantee. 

(a) The Grantee represents and agrees that the Shares to be acquired upon settlement of this Award will be acquired for investment, and not
with a view to the sale or distribution thereof. 
 (b) In the event that the sale or issuance of Shares under the Plan is not registered
under the Securities Act but an exemption is available that requires an investment representation or other representation, the Grantee shall represent and agree at the time of settlement of this Award resulting in the transfer of Shares that the
Shares being acquired are 

 
being acquired for investment, and not with a view to the sale or distribution thereof, and shall make such other representations as are deemed necessary or appropriate by the Company and its
counsel. 
 (c) Neither the Company nor any Subsidiary or Affiliate is obligated by or as a result of the Plan or this Agreement to continue
the Grantee’s Service Relationship, and neither the Plan nor this Agreement shall interfere in any way with the right of the Company or any Subsidiary or Affiliate to terminate the Service Relationship of the Grantee at any time. 

(d) The Granteee understands that the Shares may not be registered under the Securities Act (it being understood that the Shares are being
issued and sold in reliance on the exemption provided in Rule 701 thereunder) or any applicable state securities or “blue sky” laws and may not be sold or otherwise transferred or disposed of in the absence of an effective registration
statement under the Securities Act and under any applicable state securities or “blue sky” laws (or exemptions from the registration requirement thereof). 

(e) The Grantee understands and agrees that he or she may not sell or otherwise transfer or dispose of the Shares for a period of time
following the effective date of a public offering by the Company as described in Section 9(f) of the Plan. 
 (f) The Grantee
understand that although the Award is issued as a result of the Grantee’s employment with Employer, the Company will be processing the Award including all personal data obtained in connection herewith. In that respect the Grantee further
accepts that any personal data that is relevant to the Company’s processing of this Award may be transferred from Employer to the Company. Such personal data includes information on the reasoning for the termination of the employment of the
Grantee with Employer prior to the Expiration Date (if any). 
 9. Nature of Grant. In accepting the Award, the Grantee acknowledges,
understands and agrees that: 
 (a) the Plan is established voluntarily by the Company, it is discretionary in nature and it may be
modified, amended, suspended or terminated by the Company at any time, to the extent permitted by the Plan; 
 (b) the grant of the
Restricted Stock Units is voluntary and occasional and does not create any contractual or other right to receive future grants of restricted stock units, or benefits in lieu of restricted stock units, even if restricted stock units have been granted
in the past; 
 (c) all decisions with respect to future Restricted Stock Units or other grants, if any, will be at the sole discretion of
the Company; 
 (d) the Grantee is voluntarily participating in the Plan; 

(e) the Restricted Stock Units and the Shares subject to the Restricted Stock Units are not intended to replace any pension rights or
compensation; 
 (f) the Restricted Stock Units and the Shares subject to the Restricted Stock Units, and the income and value of same, are
not part of normal or expected compensation for 

 
any purposes, including calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses, long-service awards, pension or retirement or welfare
benefits or similar payments; 
 (g) the future value of the underlying Shares is unknown, indeterminable and cannot be predicted with
certainty; 
 (h) no claim or entitlement to compensation or damages shall arise from forfeiture of the Award resulting from the termination
of the Grantee’s Service Relationship (for any reason whatsoever whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Grantee is employed or the terms of the Grantee’s employment agreement,
if any), and in consideration of the grant of the Restricted Stock Units to which the Grantee is otherwise not entitled, the Grantee irrevocably agrees never to institute any claim against the Company, any Subsidiary or Affiliate, waives his or
her ability, if any, to bring any such claim, and releases the Company, its Subsidiaries and Affiliates from any such claim; if, notwithstanding the foregoing, any such claim is allowed by a court of competent jurisdiction, then, by participating in
the Plan, the Grantee shall be deemed irrevocably to have agreed not to pursue such claim and agrees to execute any and all documents necessary to request dismissal or withdrawal of such claim; 

(i) unless otherwise provided in the Plan or by the Company in its discretion, the Award and the benefits evidenced by this Agreement do not
create any entitlement to have the Restricted Stock Units or any such benefits transferred to, or assumed by, another company nor be exchanged, cashed out or substituted for, in connection with any corporate transaction affecting the Series B Common
Stock; and 
 (j) neither the Company, nor any Subsidiary shall be liable for any foreign exchange rate fluctuation between the
Grantee’s local currency and the United States Dollar that may affect the value of the Restricted Stock Units or of any amounts due to the Grantee pursuant to the settlement of the Restricted Stock Units or the subsequent sale of any Shares
acquired upon settlement. 
 10. No Advice Regarding Grant. The Company is not providing any tax, legal or financial advice, nor is
the Company making any recommendations regarding the Grantee’s participation in the Plan, or the Grantee’s acquisition or sale of the underlying Shares. The Grantee is hereby advised to consult with his or her own personal tax, legal and
financial advisors regarding his or her participation in the Plan before taking any action related to the Plan. 
 11.
Data Privacy. The Grantee hereby explicitly and unambiguously consents to the collection, use and transfer, in electronic or other form, of the Grantee’s personal data as described in this Agreement and any other Award grant
materials (“Data”) by and among, as applicable, the Company and its Subsidiaries for the exclusive purpose of implementing, administering and managing the Grantee’s participation in the Plan. 

The Grantee understands that the Company and the Employer may hold certain personal information about the Grantee, including, but not
limited to, the Grantee’s name, home address and telephone number, date of birth, social insurance number or other identification number, salary, nationality, job title, any shares of stock or directorships held in the Company, details of all
Restricted Stock Units or any other entitlement to shares of Series B 

 
Common Stock awarded, canceled, exercised, vested, unvested or outstanding in the Grantee’s favor, for the exclusive purpose of implementing, administering and managing the Plan.

 The Grantee understands that Data will be transferred to a third party stock plan service provider as may be selected by
the Company, which is assisting the Company with the implementation, administration and management of the Plan. The Grantee understands that recipients of the Data may be located in the United States or elsewhere, and that the recipients’
country (e.g., the United States) may have different data privacy laws and protections than the Grantee’s country. The Grantee understands that he or she may request a list with the names and addresses of any potential recipients of the Data by
contacting his or her local human resources representative. The Grantee authorizes the Company, the chosen stock plan service provider and any other possible recipients which may assist the Company (presently or in the future) with implementing,
administering and managing the Plan to receive, possess, use, retain and transfer the Data, in electronic or other form, for the sole purpose of implementing, administering and managing his or her participation in the Plan. The Grantee understands
that Data will be held only as long as is necessary to implement, administer and manage the Grantee’s participation in the Plan. The Grantee understands he or she may, at any time, view Data, request additional information about the storage and
processing of Data, require any necessary amendments to Data or refuse or withdraw the consents herein, in any case without cost, by contacting in writing his or her local human resources representative. Further, the Grantee understands that he or
she is providing the consents herein on a purely voluntary basis. If the Grantee does not consent, or if the Grantee later seeks to revoke his or her consent, his or her Service Relationship and career with the Employer will not be adversely
affected; the only adverse consequence of refusing or withdrawing the Grantee’s consent is that the Company would not be able to grant the Grantee Restricted Stock Units or other equity awards or administer or maintain such awards. Therefore,
the Grantee understands that refusing or withdrawing his or her consent may affect the Grantee’s ability to participate in the Plan. For more information on the consequences of the Grantee’s refusal to consent or withdrawal of consent, the
Grantee understands that he or she may contact his or her local human resources representative. 
 12. Language. If the
Grantee has received this Agreement or any other document related to the Plan translated into a language other than English and if the meaning of the translated version is different than the English version, the English version will control. 

13. Exchange Control and Tax Reporting Information. The Grantee may hold Shares acquired under the Plan in a safety-deposit
account (e.g., a brokerage account) with either a Danish bank or with an approved foreign broker or bank. If the Shares are held with a non-Danish broker or bank, the Grantee is required to inform the Danish Tax Administration about the
safety-deposit account. For this purpose, the Grantee must file a Declaration V (Erklaering V) with the Danish Tax Administration. Both the Grantee and the bank/broker must sign the Declaration V. By signing the Declaration V, the
bank/broker undertakes an obligation, without further request each year not later than on February 1 of the year following the calendar year to which the information relates, to forward certain information to the Danish Tax Administration
concerning the content of the safety-deposit account. In the event that the applicable broker or bank with which the safety-deposit account is held does not wish to, or, pursuant to the laws of the country in question, is not allowed to assume such
obligation to report, the Grantee acknowledges that he or she is solely responsible for providing certain details regarding the 

 
foreign brokerage or bank account and any Shares acquired at settlement and held in such account to the Danish Tax Administration as part of the Grantee’s annual income tax return. By
signing the Form V, the Grantee at the same time authorizes the Danish Tax Administration to examine the account. A sample of the Declaration V can be found at the following website: www.skat.dk/getFile.aspx?Id=47392. 

In addition, when the Grantee opens a deposit account or a brokerage account for the purpose of holding cash outside Denmark, the bank or brokerage account,
as applicable, will be treated as a deposit account because cash can be held in the account. Therefore, the Grantee must also file a Declaration K (Erklaering K) with the Danish Tax Administration. Both the Grantee and the
bank/broker must sign the Declaration K. By signing the Declaration K, the bank/broker undertakes an obligation, without further request each year, not later than on February 1 of the year following the calendar year to which the
information relates, to forward certain information to the Danish Tax Administration concerning the content of the deposit account. In the event that the applicable financial institution (broker or bank) with which the account is held, does not
wish to, or, pursuant to the laws of the country in question, is not allowed to assume such obligation to report, the Grantee acknowledges that he or she is solely responsible for providing certain details regarding the foreign brokerage or bank
account to the Danish Tax Administration as part of the Grantee’s annual income tax return. By signing the Declaration K, the Grantee at the same time authorizes the Danish Tax Administration to examine the account. A sample of Declaration
K can be found at the following website: www.skat.dk/getFile.aspx?Id=42409&newwindow=true. 
 [SIGNATURE PAGE FOLLOWS] 

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to
by the undersigned as of the date first above written. 
  

			
	ZENDESK, INC., San Francisco, CA
		
	By:	 	  

		 	Alan Black, CFO

 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, and understands that the Award granted
hereby is subject to the terms of the Plan and of this Agreement. 
 The undersigned also hereby acknowledges and agrees that the Shares are subject to
transfer restrictions as set forth in Section 7 of the Agreement. 
 This Agreement is hereby accepted, and the terms and conditions thereof and of the
Plan are hereby agreed to, by the undersigned as of the date first above written. 
  

			
	GRANTEE (Sign)	 	  

 
			
		
	Printed name:	 	  

 
			
		
	Address:	 	  

	
	  

 APPENDIX A 

ZENDESK, INC. 2009 STOCK OPTION AND GRANT PLAN 

 APPENDIX B 

RESTRICTED STOCK UNIT GRANT NOTICE 
  

					
	Name of Grantee:	  	  
	  	
			
	No. of Restricted Stock Units	  	  
	  	
			
	Grant Date:	  	  
	  	
			
	Expiration Date:	  	  
	  	[seventh anniversary of Grant Date]
			
	Vesting Commencement Date:	  	  
	  	[ALWAYS 15th DAY OF MONTH]

 Time-Based Vesting Schedule {COMPANY TO SELECT ONE}: 

Subject to the determination of the Committee in its sole discretion to accelerate the vesting schedule hereunder: 

 ̈ 100% of the Restricted Stock Units shall satisfy the Time Condition on the one year anniversary of Vesting
Commencement Date so long Grantee maintains a Service Relationship with the Company or the Employer through and on such date. 
  ̈ 8.333% of the Restricted Stock Units shall satisfy the Time Condition each completed month for 12 months following the Vesting Commencement Date so long as Grantee maintains a Service Relationship with the
Company or the Employer. Notwithstanding the foregoing, the Time Condition shall only be satisfied with respect to whole Restricted Stock Units and any rounding down to a number of whole Restricted Stock Units shall correspondingly increase the
number of Restricted Stock Units allocated to the final vesting date. 
 Notwithstanding anything in this Notice or the Agreement to the contrary, in the
case of a Sale Event, this Award shall be treated as provided in Section 3(c) of the Plan; provided that any Restricted Stock Units that have satisfied the Time Condition as of the consummation of such Sale Event shall either be assumed,
continued or substituted for in accordance with Section 3(c)(iii)(A) of the Plan or cancelled in exchange for a cash payment in accordance with Section 3(c)(iii)(C) of the Plan. 

Performance Vesting: As set forth in the Agreement. 

 STOCK OPTION AGREEMENT TO 

ZENDESK APS EMPLOYEES UNDER THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 
 Pursuant
to its authority under the Zendesk, Inc. 2009 Stock Option and Grant Plan (“Plan”), Zendesk, Inc.’s (“Company”) Committee (as defined in the Plan) has decided to extend, under the Plan and this Stock Option Agreement
(“Agreement”), the grant of options (each, a “Stock Option”) to certain Danish employees of its Danish subsidiary, Zendesk, ApS (“Zendesk DK”). The Committee believes that providing such employees with a direct stake in
the Company’s welfare will foster a closer alignment between their interests and those of the Company and its shareholders, thereby stimulating their efforts on behalf of the Company and strengthening their desire to stay with the Company as
employees of Zendesk DK and perform at the highest levels. 
 1. Purpose: 

Pursuant to the Plan, the Company hereby grants to the undersigned optionee and employee of Zendesk DK (the “Optionee”), Stock Options to purchase on
or prior to the expiration date indicated in the attached Stock Option Grant Notice (“Grant Notice”) marked Exhibit A (“Expiration Date”), or such other date as is specified herein, all or any part of the number of shares
of Series B Common Stock, par value $0.01 per share (“Series B Common Stock”) of the Company indicated in the Grant Notice (the “Underlying Shares,” and such shares once issued shall be referred to as the “Option
Shares”), at the exercise price per share indicated in the Grant Notice (the “Option Exercise Price”), subject to the terms and conditions set forth in this Agreement and in the Plan. Capitalized terms used but not defined in this
Agreement shall have the meaning given to them in the Plan. This Agreement only applies to Danish employees of Zendesk DK. 
 Grants of Stock Options under
this Agreement are subject to all terms, conditions and definitions as stated in said Plan unless otherwise explicitly stated in this Agreement. The Plan is attached herein and marked as Exhibit B to this Agreement. 

2. Vesting, Exercisability and Termination 
 All relevant
clauses in the Plan describing vesting, exercisability and/or termination will apply to the Optionee and grant of Stock Options under this Agreement, however such clauses in the 

  
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Plan will be subordinated to obligatory regulation regarding vesting, exercisability and termination in the Danish Act on the Use of Rights to Purchase or Subscribe for Shares etc. in Employment
Relationships (in Danish “aktieoptionsloven”)(the “Stock Option Act”). 
 The Optionee may exercise this Stock Option only in the
following manner: Following the Vesting Commencement Date and prior to the Expiration Date, the Optionee may deliver a Stock Option Exercise Notice in the form of Appendix A herein (“Exercise Notice”), indicating his or her election
to purchase some or all of the Underlying Shares. Such Exercise Notice shall specify the number of Underlying Shares to be purchased (which in each case shall be no less than 1,000 Underlying Shares, or such lesser number of Underlying Shares then
exercisable pursuant to this Stock Option). Payment of the Option Exercise Price for each Option Share may be made by one or more of the methods described in Sections 5(a)(iv)(A), (B), (C) or (D) of the Plan, subject to the limitations
contained in such Sections of the Plan. Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be exercisable after the Expiration Date. 

In the event the Optionee elects to exercise a portion of this Stock Option with respect to Shares that have not vested, the Optionee shall also deliver a
Restricted Stock Agreement covering such unvested Shares in a form to be provided by the Company (the “Restricted Stock Agreement”) with the same vesting schedule for such Shares as set forth for such Underlying Shares in the Grant Notice.
Once the Restricted Stock Agreement is executed and Stock Options exercised, the Underlying Shares (whether or not vested) may not be sold, transferred or otherwise disposed of without the advance express written consent of the Company, which
consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that (i) the Underlying Shares may be transferred without such consent to a Permitted Transferee or upon death, in accordance with the terms
and conditions of Section 9(a)(ii)(A) and (B) of the Plan, and (ii) the Underlying Shares may be transferred without the Company’s consent following an Initial Public Offering, subject to applicable terms and conditions in
Section 9 of the Plan. In addition, upon a Termination Event, the Company shall have the right to repurchase Underlying Shares that are unvested as of the date of such Termination Event. 

  
 - 2 - 

 Except as may otherwise be provided by the Committee, and subject to regulation in the Stock Option Act that
cannot be deviated from to the detriment of the Optionee, if the Optionee’s Service Relationship is terminated, the period within which to exercise this Stock Option will further be subject to the earlier termination events described below (and
if not exercised within such period, shall thereafter terminate): 
 (i) Termination Due to Death or Disability. If the Optionee’s Service
Relationship terminates by reason of such Optionee’s death or Disability (as defined below), Stock Options granted under the Grant Notice may be exercised, to the extent the Underlying Shares are vested on the date of such termination, by the
Optionee, the Optionee’s legal representative or legatee for a period of 12 months from the date of death or disability or until the Expiration Date, if earlier. For purposes of this Agreement, “Disability” means that an individual is
permanently and totally disabled so as to be unable to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment which can be expected to result in death or which has lasted or can be expected
to last for a continuous period of not less than 12 months. 
 (ii) Other Termination. If the Optionee’s Service Relationship terminates for any
reason other than death or disability (as defined in the Code) then the following shall apply: 
 a) If the Optionee terminates his/her Service Relationship
with Zendesk DK and the termination is not caused by Zendesk DK’s material breach of the employment contract among Zendesk DK and the Optionee, this Stock Option may be exercised only to the extent the Underlying Shares are vested on the date
of termination, for a period of 90 days from the date of termination or until the Expiration Date or other termination date, if earlier. 
 If Zendesk DK
terminates the employment due to breach of the employment contract by the Optionee, or if Zendesk DK summarily terminates the employment for cause (as defined in applicable Danish law and Danish case law), the Stock Option will lapse to the extent
it has not been exercised and vested on the effective date of termination of the employment. Such lapse will take place automatically without notice on the effective date of termination of the employment. 

b) If any of the following occurs: (i) Zendesk DK terminates Optionee’s employment and such termination is not caused by breach of the employment
contract by the Optionee, (ii) the Optionee terminates the employment due to Zendesk DK’s material breach of the employment contract, or (iii) Optionees employment terminates because the Optionee reaches the age of retirement for
employees in Zendesk DK or because the Optionee are entitled to receive old-age pension from the Danish state or Zendesk DK, then the Stock Options granted herein shall remain 

  
 - 3 - 

 
available on unchanged terms and remain exercisable as if the Optionee had still been employed. Also, the Optionee shall be entitled to receive a portion, proportionate to the length of the
employment in the accounting year, of the Stock Portions granted herein to which the Optionee would have been entitled according to agreement or custom, had the Optionee still been employed at the end of the accounting year or at the date of grant.

 For purposes hereof, the Committee’s determination of the reason for termination of the Optionee’s Service Relationship shall be conclusive and
binding on the Optionee and his or her representatives or legatees. 
 3. Transferability of Stock Options 

This Agreement is personal to the Optionee and is not transferable by the Optionee in any manner other than by will or by applicable Danish laws of descent and
distribution. The Stock Option may be exercised during the Optionee’s lifetime only by the Optionee (or by the Optionee’s guardian or personal representative in the event of the Optionee’s incapacity). The Optionee may elect to
designate a beneficiary by providing written notice of the name of such beneficiary to the Company, and may revoke or change such designation at any time by filing written notice of revocation or change with the Company; such beneficiary may
exercise the Optionee’s Stock Option in the event of the Optionee’s death to the extent provided herein. If the Optionee does not designate a beneficiary, or if the designated beneficiary predeceases the Optionee, the legal representative
of the Optionee may exercise this Stock Option to the extent provided herein in the event of the Optionee’s death. 
 4. Restrictions on Transfer of
Option Shares. 
 The Option Shares may not be sold, transferred or otherwise disposed of without the advance express written consent of the Company,
which consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that the Optionee may transfer vested Option Shares without such consent to a Permitted Transferee or upon the death of the Optionee, in
accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan. The Option Shares acquired upon exercise of the Stock Option shall be subject to certain additional transfer restrictions and other limitations including,
without limitation, the provisions contained in the Restricted Stock Agreement (if applicable) and Section 9 of the Plan, including but not limited to the Lockup Provisions in Section 9(f) thereof. 

  
 - 4 - 

 5. Miscellaneous Provisions. 

Subject to any applicable Danish laws which may apply and/or over alter the following provisions due to the (i) employment relations among the Optionee
and Zendesk DK or the Company; (ii) the relations among the Optionee and the Company as interpreted by another Danish law, or (iii) the Stock Option Act and/or other Danish laws relating to grants of stock options, the following shall
apply to this Agreement: 
 (a) Equitable Relief. The parties herein agree and declare that legal remedies may be inadequate to enforce the
provisions of this Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(b) Adjustments for Changes in Capital Structure. If, as a result of any reorganization, recapitalization, reincorporation, reclassification, stock
dividend, stock split, reverse stock split or other similar change in the Series B Common Stock, the number of outstanding shares of Series B Common Stock is increased or decreased, or shares of Series B Common Stock are exchanged for a different
number or kind of shares of the Company’s stock, the restrictions contained in this Agreement shall apply with equal force to additional and/or substitute securities, if any, received by the Optionee in exchange for, or by virtue of his or her
ownership of, Option Shares. 
 (c) Change and Modifications. This Agreement may not be orally changed, modified or terminated, nor shall any oral
waiver of any of its terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Optionee. 

(d) Governing Law and Venue. 
 (i) To the extent certain
Danish laws supersede the terms of this Agreement, either due to its provisions, legal precedence, or the laws governing the employment relationship among the Optionee and Zendesk DK, this Agreement and grant of Stock Options according to the Plan
shall accordingly be governed by and construed in accordance with such Danish laws. 

  
 - 5 - 

 (ii) Subject to the foregoing limitations in this Section 6(d), the following will apply: 

(A) Except as provided below, any dispute arising out of or relating to the Plan or this Stock Option, this Agreement, or the breach, termination or validity
of the Plan, this Stock Option or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the “J.A.M.S. Rules”). The
arbitration shall be governed by the United States Arbitration Act, 9 U.S.C. Sections 1 16, and judgment upon the award rendered by the arbitrators may be entered by any court having jurisdiction thereof. The place of arbitration shall be San
Francisco, California. 
 (B) The arbitration shall commence within sixty (60) days of the date on which a written demand for arbitration is filed by
any party to this Agreement. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party witnesses. In addition, each party may take up to three
depositions as of right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not have the power to order the answering of interrogatories or the
response to requests for admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven (7) business days before the date of the arbitration, the identity of all persons that may
testify at the arbitration and a copy of all documents that may be introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and award shall be made and delivered within six months of the
selection of the arbitrator. The arbitrator’s decision shall set forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of actual compensatory damages and shall
not multiply actual damages or award punitive damages, and each party hereby irrevocably waives any claim to such damages. 
 (C) The Company and Optionee
(each being a party to the Agreement), and any other holder of Option Shares issued pursuant to this Agreement (each, a “Party”) covenants and agrees that such Party will participate in the arbitration in good faith. This Section applies
equally to requests for temporary, preliminary or permanent injunctive relief, except that in the case of temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding
immediate and irreparable harm. 
 (D) Each Party (i) hereby irrevocably submits to the jurisdiction of the United States District Court in San
Francisco County, California for the purpose of enforcing the award or decision in 

  
 - 6 - 

 
any such proceeding, (ii) hereby waives, and agrees not to assert to the greatest degree allowed by applicable law (including any Danish law), by way of motion, as a defense, or otherwise,
in any such suit, action or proceeding, any claim that it is not subject personally to the jurisdiction of the above named courts, that its property is exempt or immune from attachment or execution (except as protected by applicable law), that the
suit, action or proceeding is brought in an inconvenient forum, that the venue of the suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court, and (iii) hereby waives
and agrees not to seek, to the greatest degree allowed by any applicable law (including any Danish law) any review by any court of any other jurisdiction which may be called upon to grant an enforcement of the judgment of any such court. Each Party
hereby consents to service of process by registered mail at the address to which notices are to be given. Each Party agrees that its, his or her submission to jurisdiction and its, his or her consent to service of process by mail is made for the
express benefit of all Parties and is essential to the overall purpose of this Agreement. Final judgment against any Party in any such action, suit or proceeding may be enforced in other jurisdictions by suit, action or proceeding on the judgment,
or in any other manner provided by or pursuant to the laws of such other jurisdiction. 
 (e) Headings. The headings of provisions in this Agreement
are intended only for convenience in finding the subject matter, do not constitute part of the text of this Agreement, and shall not be considered in the interpretation of this Agreement. 

(f) Saving Clause. If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall in no manner
affect the legality or enforceability of any other provision hereof. 
 (g) Notices. All notices, requests, consents and other communications shall
be in writing and be deemed given when delivered personally, by telex or facsimile transmission or when received if mailed by first class registered, certified mail, postage prepaid, or email. Notices to the Company or the Optionee shall be
addressed as set forth underneath their signatures below, or to such other address or addresses as may have been furnished by such Party in writing to the other from time to time. 

(h) Benefit and Binding Effect. This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their respective successors,
permitted assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become entitled to all the rights of the Company hereunder to the extent of such assignment. 

(i) Counterparts. For the convenience of the Parties and to facilitate execution, this Agreement may be executed in two or more counterparts, each of
which shall be deemed an original, but all of which shall constitute one and the same document. 

  
 - 7 - 

 6. Taxes 

The grant of Stock Options according to the Plan and this Agreement to Optionees will as the main rule be subject to taxation according to Danish tax law. 

According to the Danish legislation (2012), all Gains realized by the Optionee (“Gains” defined herein, with respect to each Stock Option, as the
difference between the Option Exercise Price and the fair market value of the Underlying Share on the exercise date thereof) will be taxed as personal income, as salary including labour market contribution, on the time of exercise of the Stock
Options, according to the Danish Tax Assessment Act Section 28. 
 Zendesk DK will report to the Danish Tax Authorities (“SKAT”) compliant
with Danish regulation as in effect from time to time. 
 Irrespective of the obligation of Zendesk DK to report the benefit/spread to SKAT, the Optionee
hereby agrees to comply with his/her obligation under the applicable Danish tax law to ensure and verify that the Gains are reported correctly in the annual tax return of such Optionee (or any permitted transferee thereof). 

[Remainder of this Page Left Blank Intentionally] 

  
 - 8 - 

 Signatures: 

This Agreement, including the Plan, is hereby accepted and the terms and conditions thereof are hereby agreed to by the undersigned Optionee and Zendesk, Inc.
as of the last date appearing in the signature box below: 
  

			
	ZENDESK, INC.
		
	By:	 	  

	Alan Black, CFO

 OPTIONEE: 
 The
undersigned Optionee hereby acknowledges receiving and reviewing a copy of the Plan, including without limitation, Section 9 thereof, and understands that the Stock Options granted hereby are subject to terms of the Plan and this Agreement.

 This Agreement is hereby accepted, and the terms and conditions thereof and of the Plan, SPECIFICALLY INCLUDING THE GOVERNING LAW AND VENUE PROVISIONS IN
SECTION 5(d) OF THIS AGREEMENT, are hereby agreed to, by the undersigned as of the date indicated in the signature page below. 
  

			
	OPTIONEE (Sign.):	 	  

			
	Printed name:	 	  

					
	Date:	 	  
	 	

			
	Address:	 	  

	  

 DESIGNATED BENEFICIARY (if Optionee wishes to designate under the Plan) 

 

			
	Beneficiary Name:	 	  

			
	Address:	 	  

  
 - 9 - 

 Exhibit A 

Stock Option Grant Notice 

Under the Zendesk, Inc. 

2009 Stock Option and Grant Plan 
  

	
	Name of Optionee:                     
	
	No. of Underlying Shares:                  Shares of Series B Common Stock.
	
	Grant Date:                     
	
	Expiration Date:                 
	
	Vesting Commencement Date:                     
	
	Option Exercise Price/Share: $        
	
	Vesting Schedule:

 Subject to the determination of the Committee in its sole discretion to accelerate the vesting schedule hereunder, the
Underlying Shares subject to this Stock Option shall become vested on the following dates (as indicated near one of the following vesting schedules): 

[    ] 100% of the Underlying Shares shall vest on the one year anniversary of Vesting Commencement Date so long as the Optionee maintains
a Service Relationship through and on such date. Until they become vested, the Underlying Shares shall be subject to the Company’s right of repurchase upon applicable Termination Events. 

[    ] 8.333% of the Underlying Shares shall vest at the end of each month beginning on the first month following the Vesting Commencement
Date so long as the Optionee maintains a Service Relationship through and on such date. Until they become vested, the Underlying Shares shall be subject to the Company’s right of repurchase upon applicable Termination Events. 

  
 - 10 - 

 [    ] 66.666% of the Underlying Shares shall vest on the one year anniversary of the Vesting
Commencement Date; thereafter, 5.555% of the Underlying Shares shall vest at the end of each month following the one year anniversary of the of the Vesting Commencement Date. Until they become vested, the Underlying Shares shall be subject to the
Company’s right of repurchase upon applicable Termination Events. 
 Notwithstanding anything in the Agreement to the contrary in the case of a Sale
Event, this Stock Option shall be treated as provided in Section 3(c) of the Plan. 

  
 - 11 - 

 Appendix A 

STOCK OPTION EXERCISE NOTICE 
  

	
	Zendesk, Inc.
	Attention: Chief Financial Officer
	  

	  

 Pursuant to the terms of my stock option agreement(s) between the undersigned and Zendesk, Inc. (the
“Company”) under the Zendesk, Inc. 2009Stock Option and Grant Plan, I hereby exercise such option by including herein payment in the amount of $             representing the
purchase price for the Underlying Shares. 
 Name of Optionee:
                                        

  

									
	 Grant Date
	  	Full or
partial
exercise	  	Number of
Options
Exercised	  	Price
per
share	  	Total Exercise
Price
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	

 I have chosen the following form(s) of payment: 

 

	 	[    ] 1.	Cash 

	 	[    ] 2.	Certified or bank check payable to Zendesk, Inc. 

	 	[    ] 3.	Other (as referenced in the Agreement and described in the Plan (please describe)) 

                       
                                         
                . 
 In connection with my exercise of
this Stock Option as set forth above, I hereby represent and warrant to the Company as follows: 
  

	 	i.	I am purchasing the Underlying Shares for my own account for investment only, and not for resale or with a view to the distribution thereof. 

  
 - 12 - 

	 	ii.	I have had such an opportunity as I have deemed adequate to obtain from the Company such information as is necessary to permit me to evaluate the merits and risks of my investment in the Company and have consulted with
my own advisers with respect to my investment in the Company. 

  

	 	iii.	I have sufficient experience in business, financial and investment matters to be able to evaluate the risks involved in the purchase of the Underlying Shares and to make an informed investment decision with respect to
such purchase. 

  

	 	iv.	I can afford a complete loss of the value of the Option Shares and am able to bear the economic risk of holding such Option Shares for an indefinite period of time. 

 

	 	v.	I understand that I may not sell, transfer, or otherwise dispose of any Option Shares without the advance express written consent of the Company, unless such transfer constitutes a transfer to a Permitted Transferee or
a transfer upon my death, as specifically provided for in Section 9(a)(ii)(A) and (B) of the Zendesk, Inc. 2009 Stock Option and Grant Plan. I further agree to the terms contained in the Restricted Stock Agreement regarding transfer
restrictions on unvested but exercised Stock Options. 

  

	 	vi.	To the extent required, I have executed and delivered to the Company the Restricted Stock Agreement. 

  

	 	vii.	I have read and understand the Plan and acknowledge and agree that the Shares are subject to all of the relevant terms of the Plan, including without limitation, the transfer restrictions set forth in Section 9 of
the Plan. 

  

	 	viii.	I understand and agree that the Company has a right of first refusal with respect to the Shares pursuant to Section 9 of the Plan. 

 

	 	ix.	I understand and agree that I may not sell or otherwise transfer or dispose of the Shares for a period of time following the effective date of a public offering by the Company as described in Section 9 of the Plan.

  

			
	Sincerely yours,
		
	Print Name:	 	  

		
	Signature: 	 	  

		
	Address: 	 	  

		
	Date: 	 	  

  
 - 13 - 

 Exhibit B 

ZENDESK, INC. 
 2009
STOCK OPTION AND GRANT PLAN 

  
 - 14 - 

 STOCK OPTION AGREEMENT (GERMANY) 

UNDER THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 

Pursuant to the Zendesk, Inc. 2009 Stock Option and Grant Plan, as amended (the “Plan,” attached herein and marked
Appendix A), Zendesk, Inc., a Delaware corporation (together with any successor thereto, the “Company”), hereby grants to the undersigned optionee (the “Optionee”), who is an employee of the Company or any of its
Subsidiaries, an option (the “Stock Option”) to purchase all or any part of the number of shares of Series B Common Stock, par value $0.01 per share (“Series B Common Stock”) of the Company indicated on the Stock Option Grant
Notice (“Grant Notice,” attached herein and marked Appendix D) (the “Underlying Shares,”), at the exercise price per share indicated in the Grant Notice (the “Option Exercise Price”), by filing a Stock
Option Exercise Notice (“Exercise Notice”) in the form attached herein and marked Appendix B. Such Exercise Notice may be filed on or prior to the expiration date (“Expiration Date”) indicated in the Grant Notice, or
such earlier date as is specified herein, subject to the terms and conditions set forth in this Stock Option Agreement (this “Agreement”) and in the Plan. 

All capitalized terms used herein and not otherwise defined shall have the respective meanings set forth in the Grant Notice and the Plan.

 1. Vesting, Exercisability and Termination. 

(a) Except as set forth in the Plan, and subject to the determination of the Committee in its sole discretion to accelerate the vesting
schedule hereunder, this Stock Option shall vest and become exercisable in accordance with the Vesting Schedule set forth in the Grant Notice provided the Optionee’s Service Relationship continues through each vesting date. 

(b) Termination. Except as may otherwise be provided by the Committee, if the Optionee’s Service Relationship is terminated, the
period within which to exercise this Stock Option will be subject to earlier termination as set forth below (and if not exercised within such period, shall thereafter terminate subject, in each case, to Section 3(c) of the Plan): 

(i) Termination Due to Death or Disability. If the Optionee’s Service Relationship terminates by reason of such
Optionee’s death or disability (as defined in Section 422(c) of the Code), this Stock Option may continue to be exercised, to the extent this Stock Option is vested and exercisable on the date of termination, by the Optionee, the
Optionee’s legal representative or legatee for a period of 12 months from the date of death or disability (as defined in Section 422(c) of the Code) or until the Expiration Date, if earlier. 

(ii) Other Termination. If the Optionee’s Service Relationship terminates for any reason other than death or
disability (as defined in Section 422(c) of the Code), and unless otherwise determined by the Committee, this Stock Option may continue to be exercised, to the extent this Stock Option is vested and exercisable on the date of termination, for a
period of 90 days from the date of termination or until the Expiration Date, if earlier; provided however, if the Optionee’s Service Relationship is 

 
terminated for Cause, this Stock Option shall terminate immediately upon the date of such termination. 

For purposes hereof, the Committee’s determination of the reason for termination of the Optionee’s Service Relationship shall be
conclusive and binding on the Optionee and his or her representatives or legatees. In addition, for purposes hereof, the Optionee’s Service Relationship will be considered terminated as of the date the Optionee is no longer actively providing
services to the Company or any of its Subsidiaries (regardless of the reason for such termination and whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Optionee is employed or the terms of the
Optionee’s employment agreement, if any). Unless otherwise expressly provided in this Agreement or the Plan or determined by the Company, (i) the Optionee’s right to vest in the Stock Option under the Plan, if any, will terminate as
of such date and will not be extended by any notice period (e.g., the Optionee’s period of service would not include any contractual notice period or any period of “garden leave” or similar period mandated under employment laws in the
jurisdiction where the Optionee is employed or the terms of the Optionee’s employment agreement, if any); and (ii) the period (if any) during which the Optionee may exercise the Stock Option after such termination of the
Optionee’s employment or service relationship will commence on the date the Optionee cease to actively provide services and will not be extended by any notice period mandated under employment laws in the jurisdiction where the Optionee is
employed or terms of the Optionee’s employment agreement, if any: The Committee. shall have the exclusive discretion to determine when the Optionee is no longer actively providing services for purposes of his or her Stock Option grant
(including whether the Optionee may still be considered to be providing services while on a leave of absence). Any portion of this Stock Option that is not vested and exercisable on the date of termination of the Service Relationship shall terminate
immediately and be null and void. 
 2. Exercise of Stock Option. The Optionee may exercise this Stock Option only in the following
manner: 
 (a) Prior to the Expiration Date, the Optionee may deliver an Exercise Notice indicating his or her election to purchase some or
all of the Underlying Shares. Such notice shall specify the number of Underlying Shares to be purchased. Payment of the purchase price may be made by one or more of the methods described in Section 5 of the Plan, subject to the limitations
contained in such Section of the Plan, including the requirement that the Committee specifically approve in advance certain payment methods. 

(b) Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be exercisable after the Expiration Date.

 3. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Stock Option shall be subject to and governed by
all the terms and conditions of the Plan. 
 4. Transferability of Stock Option. This Stock Option is personal to the Optionee and is
not transferable by the Optionee in any manner other than by will or by the laws of descent and distribution. The Stock Option may be exercised during the Optionee’s lifetime only by the Optionee (or by the Optionee’s guardian or personal
representative in the event of the Optionee’s incapacity). The Optionee shall not be permitted to designate a beneficiary. 

 5. Restrictions on Transfer of Underlying Shares. The Underlying Shares acquired upon
exercise of the Stock Option may not be sold, transferred or otherwise disposed of without the advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided,
however, that the Optionee may transfer the Underlying Shares without such consent (i) to a Permitted Transferee or upon the death of the Optionee, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the
Plan, and (ii) following an Initial Public Offering. In addition, such Underlying Shares shall be subject to certain additional transfer restrictions and other limitations including, without limitation, the provisions contained in
Section 9 of the Plan and. 
 6. Repurchase Right. Upon a Termination Event, the Company shall have the right to repurchase the
Underlying Shares deemed Restricted Stock as of the date of such Termination Event as set forth in Section 9(c) of the Plan. 
 7.
Tax Withholdings. Optionee acknowledges that benefits and rights provided under the Plan may be subject to federal, state, local or foreign income tax and social security withholding requirements. The parties hereto agree the following: 

(a) Where the Optionee is not employed by the Company, the Optionee agrees that he or she shall inform the Subsidiary employing Optionee
immediately of any exercise of Stock Options by providing a copy of the relevant Exercise Notice. 
 (b) Prior to the exercise of the Stock
Option, Optionee will pay or make appropriate arrangements with the Company (or its Subsidiary employing Optionee) for the satisfaction of all federal, state, local and foreign income tax and social security withholding requirements of the Company
(or its Subsidiary employing Optionee) applicable to the exercise. In this regard, Optionee authorizes the Company (or its Subsidiary employing Optionee) to withhold all required amounts legally payable by Optionee from his or her wages or other
cash compensation paid to the Optionee by the Company (or its Subsidiary employing Optionee). Alternatively, or in addition, the Optionee will pay to the Company (or its Subsidiary employing Optionee) any amount that the Company (or its Subsidiary
employing the Optionee) may be required to withhold. 
 (c) If the Optionee makes no appropriate arrangements with the Company (or its
Subsidiary employing Optionee), the Company (or its Subsidiary employing Optionee) will have the power and the right to withhold all required amounts legally payable by Optionee from his or her wages or other cash compensation paid to the Optionee
by the Company (or its Subsidiary employing Optionee) or require the Optionee to remit to the Company (or its Subsidiary employing Optionee), an amount sufficient to satisfy all federal, state, local or foreign income tax and/or social security
contributions required to be withheld by law. Alternatively, or in addition, if permissible under local law, the Company may, in its discretion, (i) sell or arrange for the sale of Underlying Shares that Optionee acquires to meet the
withholding obligation, and/or (ii) withhold in Underlying Shares, provided that the Company only withholds the amount of Underlying Shares necessary to satisfy the minimum withholding amount. 

(d) Optionee acknowledges and agrees that the Company may refuse to honor the exercise and refuse to deliver the Underlying Shares if such
withholding amounts are not delivered at the time of exercise. 

 8. Miscellaneous Provisions. 

(a) Equitable Relief. The parties hereto agree and declare that legal remedies may be inadequate to enforce the provisions of this
Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(b) Adjustments for Changes in Capital Structure. If, as a result of any reorganization, recapitalization, reincorporation,
reclassification, stock dividend, stock split, reverse stock split or other similar change in the Series B Common Stock, the outstanding shares of Series B Common Stock are increased or decreased or are exchanged for a different number or kind of
securities of the Company, the restrictions contained in this Agreement shall apply with equal force to additional and/or substitute securities, if any, received by the Optionee in exchange for, or by virtue of his or her ownership of, this Stock
Option or Underlying Shares acquired pursuant thereto. 
 (c) Change and Modifications. This Agreement may not be orally changed,
modified or terminated, nor shall any oral waiver of any of its terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Optionee. 

(d) Governing Law. This Agreement shall be governed by and construed in accordance with the General Corporation Law of the State of
Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of California, without regard to conflict of law principles that would result in the application of
any law other than the law of the State of California. 
 (e) Headings. The headings are intended only for convenience in finding the
subject matter and do not constitute part of the text of this Agreement and shall not be considered in the interpretation of this Agreement. 

(f) Saving Clause. If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall
in no manner affect the legality or enforceability of any other provision hereof. 
 (g) Notices. All notices, requests, consents and
other communications shall be in writing and be deemed given when delivered personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the
Optionee shall be addressed as set forth underneath their signatures below, or to such other address or addresses as may have been furnished by such party in writing to the other. 

(h) Benefit and Binding Effect. This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their
respective successors, permitted assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become entitled to all the rights of the Company hereunder to the extent of such assignment. 

 (i) Counterparts. For the convenience of the parties and to facilitate execution, this
Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 

(j) Integration. This Agreement constitutes the entire agreement between the parties with respect to this Stock Option and supersedes
all prior agreements and discussions between the parties concerning such subject matter. 
 9. Dispute Resolution. 

(a) Except as provided below, any dispute arising out of or relating to the Plan or this Stock Option, this Agreement, or the breach,
termination or validity of the Plan, this Stock Option or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the
“J.A.M.S. Rules”). The arbitration shall be governed by the United States Arbitration Act, 9 U.S.C. Sections 1 16, and judgment upon the award rendered by the arbitrators may be entered by any court having jurisdiction thereof. The place
of arbitration shall be San Francisco, California. 
 (b) The arbitration shall commence within 60 days of the date on which a written
demand for arbitration is filed by any party hereto. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party witnesses. In addition, each party may
take up to three depositions as of right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not have the power to order the answering of
interrogatories or the response to requests for admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven business days before the date of the arbitration, the identity of all
persons that may testify at the arbitration and a copy of all documents that may be introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and award shall be made and delivered within
six months of the selection of the arbitrator. The arbitrator’s decision shall set forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of actual compensatory
damages and shall not multiply actual damages or award punitive damages, and each party hereby irrevocably waives any claim to such damages. 

(c) The Company, the Optionee, each party to the Agreement and any other holder of Underlying Shares issued pursuant to this Agreement (each,
a “Party”) covenants and agrees that such party will participate in the arbitration in good faith. This Section 7 applies equally to requests for temporary, preliminary or permanent injunctive relief, except that in the case of
temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding immediate and irreparable harm. 

(d) Each Party (i) hereby irrevocably submits to the jurisdiction of any United States District Court of competent jurisdiction for the
purpose of enforcing the award or decision in any such proceeding, (ii) hereby waives, and agrees not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject personally
to the jurisdiction of the above named courts, that its property is exempt or immune from attachment or execution (except as protected by applicable law), that the suit, action or 

 
proceeding is brought in an inconvenient forum, that the venue of the suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such
court, and (iii) hereby waives and agrees not to seek any review by any court of any other jurisdiction which may be called upon to grant an enforcement of the judgment of any such court. Each Party hereby consents to service of process by
registered mail at the address to which notices are to be given. Each Party agrees that its, his or her submission to jurisdiction and its, his or her consent to service of process by mail is made for the express benefit of each other Party. Final
judgment against any Party in any such action, suit or proceeding may be enforced in other jurisdictions by suit, action or proceeding on the judgment, or in any other manner provided by or pursuant to the laws of such other jurisdiction. 

10. Nature of Grant. In accepting the Stock Option, the Optionee acknowledges, understands and agrees that: 

(a) the Plan is established voluntarily by the Company, it is discretionary in nature, and may be amended, suspended or terminated by the
Company at any time, to the extent permitted by the Plan; 
 (b) the grant of the Stock Option is voluntary and occasional and does not
create any contractual or other right to receive future grants of stock options, or benefits in lieu of stock options, even if stock options have been granted in the past; 

(c) all decisions with respect to future Stock Option or other grants, if any, will be at the sole discretion of the Company; 

(d) the Optionee is voluntarily participating in the Plan; 

(e) the Stock Option and any Underlying Shares acquired under the Plan are not intended to replace any pension rights or compensation; 

(f) the Stock Option and any Underlying Shares acquired under the Plan, and the income and value of same, are not part of normal or expected
compensation for any purposes, including, but not limited, calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses, long-service awards, pension or retirement or welfare benefits or similar
payments; 
 (g) the future value of the Underlying Shares is unknown, indeterminable, and cannot be predicted with certainty; 

(h) if the Underlying Shares do not increase in value, the Stock Option will have no value; 

(i) if the Optionee exercises the Stock Option and acquires Underlying Shares, the value of such Underlying Shares may increase or decrease in
value, even below the Option Exercise Price; 
 (j) no claim or entitlement to compensation or damages shall arise from forfeiture of the
Stock Option resulting from the termination of the Optionee’s Service Relationship (for any reason whatsoever, whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Optionee is employed or the
terms of the 

 
Optionee’s employment agreement, if any), and in consideration of the grant of the Stock Option to which the Optionee is otherwise not entitled, the Optionee irrevocably agrees never to
institute any claim against the Company or any of its Subsidiaries, waives his or her ability, if any, to bring any such claim, and releases the Company and its Subsidiaries from any such claim; if, notwithstanding the foregoing, any such claim is
allowed by a court of competent jurisdiction, then, by participating in the Plan, the Optionee shall be deemed irrevocably to have agreed not to pursue such claim and agrees to execute any and all documents necessary to request dismissal or
withdrawal of such claim; 
 (k) unless otherwise provided in the Plan or by the Company in its discretion, the Stock Option and the
benefits evidenced by this Agreement do not create any entitlement to have the Stock Option or any such benefits transferred to, or assumed by, another company nor to be exchanged, cashed out or substituted for, in connection with any corporate
transaction affecting the shares of the Company; and 
 (l) neither the Company nor any of its Subsidiaries shall not be liable for any
foreign exchange rate fluctuation between the Optionee’s local currency and the United States Dollar that may affect the value of the Stock Option or of any amounts due to the Optionee pursuant to the exercise of the Stock Option or the
subsequent sale of any Underlying Shares acquired upon exercise. 
 11. Data Privacy. The Optionee hereby
explicitly and unambiguously consents to the collection, use and transfer, in electronic or other form, of the Optionee’s personal data as described in this Agreement and any other Stock Option grant materials (“Data”) by and among
the Company and its Subsidiaries for the exclusive purpose of implementing, administering and managing the Optionee’s participation in the Plan.

The Optionee understands that the Company and its Subsidiaries may hold certain personal information about the Optionee, including, but
not limited to, the Optionee’s name, home address and telephone number, date of birth, social insurance number or other identification number, salary, nationality, job title, any shares of stock or directorships held in the Company, details of
all stock options or any other entitlement to shares of stock awarded, canceled, exercised, vested, unvested or outstanding in the Optionee’s favor, for the exclusive purpose of implementing, administering and managing the Plan.

The Optionee understands that Data will be transferred to a third party stock plan service provider as may be selected by the Company in
the future, which is assisting the Company with the implementation, administration and management of the Plan. The Optionee understands that recipients of the Data may be located in the United States or elsewhere, and that the recipient’s
country (e.g., the United States) may have different data privacy laws and protections than the Optionee’s country. The Optionee understands that he or she may request a list with the names and addresses of any potential recipients of the
Data by contacting his or her local human resources representative. The Optionee authorizes the Company, the chosen third party stock plan service provider and any other possible recipients which may assist the Company (presently or in the
future) with implementing, administering and managing the Plan to receive, possess, use, retain and transfer the Data, in electronic or other form, for the sole purposes of implementing, administering and managing the Optionee’s participation
in the Plan. The Optionee understands that Data will be held only as 

 
long as is necessary to implement, administer and manage the Optionee’s participation in the Plan. The Optionee understands that he or she may, at any time, view Data, request additional
information about the storage and processing of Data, require any necessary amendments to Data or refuse or withdraw the consents herein, in any case without cost, by contacting in writing his or her local human resources
representative. Further, the Optionee understands that he or she is providing the consents herein on a purely voluntary basis. If the Optionee does not consent, or if the Optionee later seeks to revoke his or her consent, his or
her employment status or service and career with the Company or any of its Subsidiaries will not be adversely affected; the only adverse consequence of refusing or withdrawing the Optionee’s consent is that the Company would not be able to
grant the Optionee Stock Options or other equity awards or administer or maintain such awards. Therefore, the Optionee understands that refusing or withdrawing his or her consent may affect the Optionee’s ability to participate in the
Plan. For more information on the consequences of the Optionee’s refusal to consent or withdrawal of consent, the Optionee understands that he or she may contact his or her local human resources representative. 

12. Language. If the Optionee has received this Agreement or any other document related to the Plan translated into a language
other than English and if the meaning of the translated version is different than the English version, the English version will control. 

13. Exchange Control Information. Cross-border payments in excess of €12,500 must be reported monthly to the German
Federal Bank (Bundesbank). In case of payments in connection with securities (including proceeds realized upon the sale of Shares), the report must be made by the 5th day of the month following the month in which the payment was received
and must be filed electronically. The form of report (Allgemeine Meldeportal Statistik) can be accessed via the Bundesbank’s website (www.bundesbank.de) and is available in both German and English. The Optionee is
responsible for satisfying the reporting obligation. 
 [SIGNATURE PAGE FOLLOWS] 

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to
by the undersigned as of the date first above written. 
  

			
	ZENDESK, INC., San Francisco, CA
		
	By:	 	  

		 	Alan Black, CFO

 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, including, without limitation,
Section 9 thereof, and understands that the Stock Option granted hereby is subject to the terms of the Plan and of this Agreement. 
 The undersigned
also hereby acknowledges and agrees that the Underlying Shares are subject to transfer restrictions as set forth in Section 5 of the Agreement. 
 This
Agreement is hereby accepted, and the terms and conditions thereof and of the Plan, SPECIFICALLY INCLUDING THE ARBITRATION PROVISIONS IN SECTION 9 OF THIS AGREEMENT, are hereby agreed to, by the undersigned as of the date first above written. 

 

			
	OPTIONEE (Sign)	 	  

 
			
		
	Printed name:	 	  

 
			
		
	Address:	 	  

	
	  

 APPENDIX A 

ZENDESK, INC. 2009 STOCK OPTION AND GRANT PLAN 

 APPENDIX B 

STOCK OPTION EXERCISE NOTICE 
 To:
Zendesk, Inc., attention Chief Financial Officer 
 Pursuant to the terms of my stock option agreement(s) between the undersigned
and Zendesk, Inc. (the “Company”) under the Zendesk, Inc. 2009 Stock Option and Grant Plan, I hereby exercise such option by including herein payment in the form of a personal check representing the purchase price for the Underlying
Shares. 
  

											
		 	 Name of Optionee:	 	  
	 		  	Today’s Date	  	  

  

											
	 	  	# of Underlying
Shares	  	Strike Price
per
Underlying
Share	 	  	Aggregate
exercise price	 
	 Number of Underlying Shares underlying options granted
on                 , 20    
	  		  	$	 	  	  			
	  
 (if multiple options are
involved, please list separately)
	  		  				  			
				
	 Underlying Shares that I am acquiring
	  		  	$	 	  	  	$	 	  
				
	 Underlying Shares that I am not acquiring now
	  		  				  			
				
	 Payment to Zendesk
	  		  				  	$	 	  

 In connection with my exercise of the option as set forth above, I hereby represent and warrant to the Company as follows:

 (i) I am purchasing the Underlying Shares for my own account for investment only, and not for resale or with a view to the
distribution thereof. 
 (ii) I have had such an opportunity as I have deemed adequate to obtain from the Company such
information as is necessary to permit me to evaluate the merits and risks of my investment in the Company and have consulted with my own advisers with respect to my investment in the Company, including tax advisers with regards to any tax
implications. 

 (iii) I have sufficient experience in business, financial and investment matters
to be able to evaluate the risks involved in the purchase of the Underlying Shares and to make an informed investment decision with respect to such purchase. 

(iv) I can afford a complete loss of the value of the Underlying Shares and am able to bear the economic risk of holding such
Underlying Shares for an indefinite period of time. 
 (v) I understand that the shares of Series B Common Stock that I
acquire upon exercise of the Stock Options (using Appendix B) as well as any shares of Series A Common Stock and Series B Common Stock that I have previously purchased, been granted, or that are subject to other awards made to me under
the Plan, may not be sold, transferred or otherwise disposed of without the advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that I may
transfer any such shares without such consent (i) to a Permitted Transferee (as defined in the Plan) or upon my death, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan, and (ii) subject to
the other transfer restrictions as set forth in Section 9 of the Plan, upon an Initial Public Offering. 
 (vi) I
understand that the Underlying Shares may not be registered under the Securities Act (it being understood that the Underlying Shares are being issued and sold in reliance on the exemption provided in Rule 701 thereunder) or any applicable state
securities or “blue sky” laws and may not be sold or otherwise transferred or disposed of in the absence of an effective registration statement under the Securities Act and under any applicable state securities or “blue sky” laws
(or exemptions from the registration requirement thereof). I further acknowledge that certificates representing Underlying Shares will bear restrictive legends reflecting the foregoing and/or that book entries for uncertificated Underlying Shares
will include similar restrictive notations. 
 (vii) I have read and understand the Plan and acknowledge and agree that the
Underlying Shares are subject to all of the relevant terms of the Plan, including without limitation, the transfer restrictions set forth in Section 9 of the Plan. 

(viii) I understand and agree that the Company has a right of first refusal with respect to the Underlying Shares pursuant to
Section 9(b) of the Plan. 
 (ix) I understand and agree that the Company has certain repurchase rights with respect to
the Underlying Shares pursuant to Section 9(c) of the Plan. 
 (x) I understand and agree that I may not sell or
otherwise transfer or dispose of the Underlying Shares for a period of time following the effective date of a public offering by the Company as described in Section 9(f) of the Plan. 

 

	
	Sincerely yours,
	
	OPTIONEE:

 
	
	  

	Name:
	
	Address:
	
	  

	
	  

	
	  

 APPENDIX D 

STOCK OPTION GRANT NOTICE 
  

			
	Name of Optionee:	  	 _____________________________________________

		
	No. of Underlying Shares	  	_________________ Shares of Series B Common Stock
		
	Grant Date:	  	___________________________, 201___
		
	Expiration Date:	  	___________________________, 202___
		
	Vesting begins on:	  	___________________________ 201___  (Vesting Commencement Date)
		
	Option Exercise Price/Share:	  	$0.__________

 Vesting Schedule: 

Subject to the determination of the Committee in its sole discretion to accelerate the vesting schedule hereunder, this Stock Option shall be vested with
respect to the Underlying Shares on the respective dates indicated below: 
 (i) 25% of the Underlying Shares shall vest on the first anniversary of the
Vesting Commencement Date; and 
 (ii) 2.0833% of the Underlying Shares shall vest each completed month for 36 months following the first anniversary of the
Vesting Commencement Date, 
 so long as the Optionee maintains a Service Relationship on each such date. 

Notwithstanding anything in the Agreement to the contrary in the case of a Sale Event, this Stock Option shall be treated as provided in
Section 3(c) of the Plan. 

 STOCK OPTION AGREEMENT (IRELAND) 

UNDER THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 

Pursuant to the Zendesk, Inc. 2009 Stock Option and Grant Plan, as amended (the “Plan,” attached herein and marked
Appendix A), Zendesk, Inc., a Delaware corporation (together with any successor thereto, the “Company”), hereby grants to the undersigned optionee (the “Optionee”), who is an employee of the Company or any of its
Subsidiaries, an option (the “Stock Option”) to purchase all or any part of the number of shares of Series B Common Stock, par value $0.01 per share (“Series B Common Stock”) of the Company indicated on the Stock Option Grant
Notice (“Grant Notice,” attached herein and marked Appendix D) (the “Underlying Shares,”), at the exercise price per share indicated in the Grant Notice (the “Option Exercise Price”), by filing a Stock Option
Exercise Notice (“Exercise Notice”) in the form attached herein and marked Appendix B. Such Exercise Notice may be filed on or prior to the expiration date (“Expiration Date”) indicated in the Grant Notice, or such earlier
date as is specified herein, subject to the terms and conditions set forth in this Stock Option Agreement (this “Agreement”) and in the Plan. 

All capitalized terms used herein and not otherwise defined shall have the respective meanings set forth in the Grant Notice and the Plan.

 1. Vesting, Exercisability and Termination. 

(a) This Stock Option shall be immediately exercisable, regardless of whether the Underlying Shares are vested. 

(b) Except as set forth below, and subject to the determination of the Committee in its sole discretion to accelerate the vesting schedule
hereunder, the Underlying Shares shall be vested on the respective dates indicated below: 
 (i) All Underlying Shares shall
be initially unvested. 
 (ii) The Underlying Shares shall vest in accordance with the Vesting Schedule set forth in the
Grant Notice provided the Optionee’s Service Relationship continues through each vesting date. 
 (c) Termination. Except as may
otherwise be provided by the Committee, if the Optionee’s Service Relationship is terminated, the period within which to exercise this Stock Option will be subject to earlier termination as set forth below (and if not exercised within such
period, shall thereafter terminate subject, in each case, to Section 3(c) of the Plan): 
 (i) Termination Due to
Death or Disability. If the Optionee’s Service Relationship terminates by reason of such Optionee’s death or disability (as defined in Section 422(c) of the Code), this Stock Option may continue to be exercised, to the extent the
Underlying Shares are vested on the date of termination, by the Optionee, the Optionee’s legal representative or legatee for a period of 12 months from the date of 

 
death or disability (as defined in Section 422(c) of the Code) or until the Expiration Date, if earlier. 

(ii) Other Termination. If the Optionee’s Service Relationship terminates for any reason other than death or
disability (as defined in Section 422(c) of the Code), and unless otherwise determined by the Committee, this Stock Option may continue to be exercised, to the extent the Underlying Shares are vested on the date of termination, for a period of
90 days from the date of termination or until the Expiration Date, if earlier; provided however, if the Optionee’s Service Relationship is terminated for Cause, this Stock Option shall terminate immediately upon the date of such
termination. 
 For purposes hereof, the Committee’s determination of the reason for termination of the Optionee’s Service
Relationship shall be conclusive and binding on the Optionee and his or her representatives or legatees. In addition, for purposes hereof, the Optionee’s Service Relationship will be considered terminated as of the date that the Optionee is no
longer actively providing services to the Company or any of its Subsidiaries (regardless of the reason for such termination and whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Optionee is
employed or the terms of the Optionee’s employment agreement, if any). Unless otherwise expressly provided in this Agreement or the Plan or determined by the Company, (i) the Optionee’s right to vest in the Stock Option under the
Plan, if any, will terminate as of such date and will not be extended by any notice period (e.g., the Optionee’s period of service would not include any contractual notice period or any period of “garden leave” or similar
period mandated under employment laws in the jurisdiction where the Optionee is employed or the terms of the Optionee’s employment agreement, if any). 

Any portion of this Stock Option with respect to Underlying Shares that are not vested on the date of termination of the Service Relationship,
as described above, shall terminate immediately and be null and void. 
 2. Exercise of Stock Option. The Optionee may exercise this
Stock Option only in the following manner: 
 (a) Prior to the Expiration Date, the Optionee may deliver an Exercise Notice indicating his
or her election to purchase some or all of the Underlying Shares. Such notice shall specify the number of Underlying Shares to be purchased. To the extent this Stock Option is only partially exercised, such exercise shall first be with respect to
the Underlying Shares, if any, that have previously vested, and then with respect to the Underlying Shares that will next vest, with the Underlying Shares that vest at the latest date being exercised last. Payment of the purchase price may be made
by one or more of the methods described in Section 5 of the Plan, subject to the limitations contained in such Section of the Plan, including the requirement that the Committee specifically approve in advance certain payment methods. 

(b) In the event the Optionee exercises a portion of this Stock Option with respect to Underlying Shares that have not vested, the Optionee
shall also deliver a Restricted Stock Agreement covering such unvested Underlying Shares in the form attached herein and marked Appendix C (the “Restricted Stock Agreement”) with the same vesting schedule for such Underlying
Shares as set forth for the Underlying Shares herein. The Restricted Stock Agreement shall be deemed a Restricted Stock Award and all Underlying Shares so acquired 

 
pursuant to such Restricted Stock Agreement shall be deemed Restricted Stock for all purposes under the Plan. 

(c) Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be exercisable after the Expiration Date.

 3. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Stock Option shall be subject to and governed by
all the terms and conditions of the Plan. 
 4. Transferability of Stock Option. This Stock Option is personal to the Optionee and is
not transferable by the Optionee in any manner other than by will or by the laws of descent and distribution. The Stock Option may be exercised during the Optionee’s lifetime only by the Optionee (or by the Optionee’s guardian or personal
representative in the event of the Optionee’s incapacity). The Optionee shall not be permitted to designate a beneficiary. 
 5.
Restrictions on Transfer of Underlying Shares. The Underlying Shares acquired upon exercise of the Stock Option may not be sold, transferred or otherwise disposed of without the advance express written consent of the Company, which consent
may be given or denied in the Company’s sole and absolute discretion; provided, however, that the Optionee may transfer the Underlying Shares without such consent (i) to a Permitted Transferee or upon the death of the Optionee, in
accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan, and (ii) following an Initial Public Offering. In addition, such Underlying Shares shall be subject to certain additional transfer restrictions and
other limitations including, without limitation, the provisions contained in Section 9 of the Plan and, if applicable, the Restricted Stock Agreement. 

6. Repurchase Right. Upon a Termination Event, the Company shall have the right to repurchase the Underlying Shares deemed Restricted
Stock as of the date of such Termination Event as set forth in Section 9(c) of the Plan. 
 7. Miscellaneous Provisions. 

(a) Equitable Relief. The parties hereto agree and declare that legal remedies may be inadequate to enforce the provisions of this
Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(b) Adjustments for Changes in Capital Structure. If, as a result of any reorganization, recapitalization, reincorporation,
reclassification, stock dividend, stock split, reverse stock split or other similar change in the Series B Common Stock, the outstanding shares of Series B Common Stock are increased or decreased or are exchanged for a different number or kind of
securities of the Company, the restrictions contained in this Agreement shall apply with equal force to additional and/or substitute securities, if any, received by the Optionee in exchange for, or by virtue of his or her ownership of, this Stock
Option or Underlying Shares acquired pursuant thereto. 
 (c) Change and Modifications. This Agreement may not be orally changed,
modified or terminated, nor shall any oral waiver of any of its terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Optionee. 

 (d) Governing Law. This Agreement shall be governed by and construed in accordance with
the General Corporation Law of the State of Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of California, without regard to conflict of law
principles that would result in the application of any law other than the law of the State of California. 
 (e) Headings. The
headings are intended only for convenience in finding the subject matter and do not constitute part of the text of this Agreement and shall not be considered in the interpretation of this Agreement. 

(f) Saving Clause. If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall
in no manner affect the legality or enforceability of any other provision hereof. 
 (g) Notices. All notices, requests, consents and
other communications shall be in writing and be deemed given when delivered personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the
Optionee shall be addressed as set forth underneath their signatures below, or to such other address or addresses as may have been furnished by such party in writing to the other. 

(h) Benefit and Binding Effect. This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their
respective successors, permitted assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become entitled to all the rights of the Company hereunder to the extent of such assignment. 

(i) Counterparts. For the convenience of the parties and to facilitate execution, this Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 
 (j)
Integration. This Agreement constitutes the entire agreement between the parties with respect to this Stock Option and supersedes all prior agreements and discussions between the parties concerning such subject matter. 

8. Dispute Resolution. 

(a) Except as provided below, any dispute arising out of or relating to the Plan or this Stock Option, this Agreement, or the breach,
termination or validity of the Plan, this Stock Option or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the
“J.A.M.S. Rules”). The arbitration shall be governed by the United States Arbitration Act, 9 U.S.C. Sections 1 16, and judgment upon the award rendered by the arbitrators may be entered by any court having jurisdiction thereof. The place
of arbitration shall be San Francisco, California. 
 (b) The arbitration shall commence within 60 days of the date on which a written
demand for arbitration is filed by any party hereto. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party witnesses. In addition, each party may
take up to three depositions as 

 
of right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not have the power to order the
answering of interrogatories or the response to requests for admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven business days before the date of the arbitration, the identity
of all persons that may testify at the arbitration and a copy of all documents that may be introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and award shall be made and delivered
within six months of the selection of the arbitrator. The arbitrator’s decision shall set forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of actual
compensatory damages and shall not multiply actual damages or award punitive damages, and each party hereby irrevocably waives any claim to such damages. 

(c) The Company, the Optionee, each party to the Agreement and any other holder of Underlying Shares issued pursuant to this Agreement (each,
a “Party”) covenants and agrees that such party will participate in the arbitration in good faith. This Section 7 applies equally to requests for temporary, preliminary or permanent injunctive relief, except that in the case of
temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding immediate and irreparable harm. 

(d) Each Party (i) hereby irrevocably submits to the jurisdiction of any United States District Court of competent jurisdiction for the
purpose of enforcing the award or decision in any such proceeding, (ii) hereby waives, and agrees not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject personally
to the jurisdiction of the above named courts, that its property is exempt or immune from attachment or execution (except as protected by applicable law), that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the
suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court, and (iii) hereby waives and agrees not to seek any review by any court of any other jurisdiction which may be
called upon to grant an enforcement of the judgment of any such court. Each Party hereby consents to service of process by registered mail at the address to which notices are to be given. Each Party agrees that its, his or her submission to
jurisdiction and its, his or her consent to service of process by mail is made for the express benefit of each other Party. Final judgment against any Party in any such action, suit or proceeding may be enforced in other jurisdictions by suit,
action or proceeding on the judgment, or in any other manner provided by or pursuant to the laws of such other jurisdiction. 
 9. Tax
Withholdings. Optionee acknowledges that benefits and rights provided under the Plan may be subject to federal, state, local or foreign income tax and social security withholding requirements. The parties hereto agree to the following: 

(a) Prior to any taxable event related to the Stock Option, Optionee will pay or make appropriate arrangements with the Company (or its
Subsidiary employing Optionee) for the satisfaction of all federal, state, local and foreign income tax and social security withholding requirements of the Company (or its Subsidiary employing Optionee) applicable to the taxable event. In this
regard, Optionee will authorizes the Company (or its Subsidiary employing Optionee) to withhold all required amounts legally payable by Optionee from his or her wages or other cash compensation paid to the Optionee by the Company (or its Subsidiary
employing Optionee). Alternatively, or in addition, the Optionee will pay to the Company (or its Subsidiary 

 
employing Optionee) any amount that the Company (or its Subsidiary employing the Optionee) may be required to withhold. 

(b) If the Optionee makes no appropriate arrangements with the Company (or its Subsidiary employing Optionee), the Company (or its Subsidiary
employing Optionee) will have the power and the right to withhold all required amounts legally payable by Optionee from his or her wages or other cash compensation paid to the Optionee by the Company (or its Subsidiary employing Optionee) or require
the Optionee to remit to the Company (or its Subsidiary employing Optionee) an amount sufficient to satisfy all federal, state, local or foreign income tax and/or social security contributions required to be withheld by law. Alternatively, or in
addition, if permissible under local law, the Company may, in its discretion, (i) sell or arrange for the sale of Underlying Shares that Optionee acquires to meet the withholding obligation, and/or (ii) withhold in Underlying Shares,
provided that the Company only withholds the amount of Underlying Shares necessary to satisfy the minimum withholding amount. 
 (c)
Optionee acknowledges and agrees that the Company may refuse to honor the exercise and refuse to deliver the Underlying Shares if such withholding amounts are not delivered at the time of exercise. 

10. Data Protection. 

(a) By entering into this Agreement, and as a condition of the grant of the Stock Option, Optionee consents to the collection, use, and
transfer of Data as described in this paragraph to the full extent permitted by and in full compliance with applicable laws. 
 (b) Optionee
understands that the Company and its Subsidiaries hold Data about the Optionee for the purpose of managing and administering the Plan. 

(c) Optionee further understands that the Company and/or its Subsidiaries will transfer Data among themselves as necessary for the purposes of
implementation, administration, and management of Optionee’s participation in the Plan, and that the Company and/or its Subsidiary may each further transfer Data to any Data Recipients. 

(d) Optionee understands that these Data Recipients may be located in Optionee’s country of residence or elsewhere, such as the United
States. Optionee authorises the Data Recipients to receive, possess, use, retain, and transfer Data in electronic or other form, for the purposes of implementing, administering, and managing Optionee’s participation in the Plan, including any
transfer of such Data, as may be required for the administration of the Plan and/or the subsequent holding of Underlying Shares on Optionee’s behalf, to a broker or third party with whom the Underlying Shares acquired on exercise may be
deposited. Where the transfer is to be to a destination outside the European Economic Area, the Company shall take reasonable steps to ensure that the Optionee’s Data continues to be adequately protected and securely held. 

(e) Optionee understands that Optionee may, at any time, review the Data, request that any necessary amendments be made to it, or withdraw
Optionee’s consent herein in writing by contacting the Company. Optionee further understands that withdrawing consent may affect Optionee’s ability to participate in the Plan. 

(f) For purposes of this Agreement, the terms (1) “Data” shall mean certain personal information about the Optionee, including,
but not limited to, name, home address and 

 
telephone number, date of birth, social insurance number, salary, nationality, job title, any stock, units or directorships held in the Company, details of all options or other entitlement to
shares awarded, cancelled, exercised, vested, unvested, or outstanding in the Optionee’s favor; and (ii) “Data Recipient” shall mean third parties assisting the Company in the implementation, administration, and management of the
Plan. 
 11. Additional Terms. 

(a) Optionee has no right to compensation or damages for any loss in respect of the Stock Option where such loss arises (or is claimed to
arise), in whole or in part, from the termination of Optionee’s Service Relationship, or notice to terminate Optionee’s Service Relationship given by or to Optionee. 

(b) Optionee has no right to compensation or damages for any loss in respect of an Stock Option where such loss arises (or is claimed to
arise), in whole or in part, from any company ceasing to be a Subsidiary, or the transfer of any business from a Subsidiary to any person which is not a Subsidiary. 

12. Nature of Grant. In accepting the Stock Option, the Optionee acknowledges, understands and agrees that: 

(a) the Plan is established voluntarily by the Company, it is discretionary in nature, and may be amended, suspended or terminated by the
Company at any time, to the extent permitted by the Plan; 
 (b) the grant of the Stock Option is voluntary and occasional and does not
create any contractual or other right to receive future grants of stock options, or benefits in lieu of stock options, even if stock options have been granted in the past; 

(c) all decisions with respect to future Stock Option or other grants, if any, will be at the sole discretion of the Company; 

(d) the Stock Option grant and the Optionee’s participation in the Plan shall not create a right to employment or be interpreted as
forming a Service Relationship with the Company (or its Subsidiary employing Optionee or any other Subsidiary), and shall not interfere with the ability of the Company (or its Subsidiary employing Optionee or any other Subsidiary), as applicable, to
terminate the Optionee’s Service Relationship; 
 (e) the Optionee is voluntarily participating in the Plan; 

(f) the Stock Option and any Underlying Shares acquired under the Plan are not intended to replace any pension rights or compensation; 

(g) the Stock Option and any Underlying Shares acquired under the Plan, and the income and value of same, are not part of normal or expected
compensation for any purposes, including, but not limited, calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses, long-service awards, pension or retirement or welfare benefits or similar
payments; 

 (h) the future value of the Underlying Shares is unknown, indeterminable, and cannot be predicted
with certainty; 
 (i) if the underlying Shares do not increase in value, the Stock Option will have no value; 

(j) if the Optionee exercises the Stock Option and acquires Underlying Shares, the value of such Underlying Shares may increase or decrease in
value, even below the Option Exercise Price; 
 (k) no claim or entitlement to compensation or damages shall arise from forfeiture of the
Stock Option resulting from the termination of the Optionee’s Service Relationship (for any reason whatsoever, whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Optionee is employed
or the terms of the Optionee’s employment agreement, if any), and in consideration of the grant of the Stock Option to which the Optionee is otherwise not entitled, the Optionee irrevocably agrees never to institute any claim against the
Company or any of its Subsidiaries, waives his or her ability, if any, to bring any such claim, and releases the Company and its Subsidiaries from any such claim; if, notwithstanding the foregoing, any such claim is allowed by a court of competent
jurisdiction, then, by participating in the Plan, the Optionee shall be deemed irrevocably to have agreed not to pursue such claim and agrees to execute any and all documents necessary to request dismissal or withdrawal of such claim; 

(l) unless otherwise provided in the Plan or by the Company in its discretion, the Stock Option and the benefits evidenced by this Agreement
do not create any entitlement to have the Stock Option or any such benefits transferred to, or assumed by, another company nor to be exchanged, cashed out or substituted for, in connection with any corporate transaction affecting the shares of the
Company; and 
 (m) neither the Company nor any of its Subsidiaries shall not be liable for any foreign exchange rate fluctuation between
the Optionee’s local currency and the United States Dollar that may affect the value of the Stock Option or of any amounts due to the Optionee pursuant to the exercise of the Stock Option or the subsequent sale of any Underlying Shares acquired
upon exercise. 
 13. Director Notification Requirement. If the Optionee is a director, shadow director or secretary of an Irish
Subsidiary, the Optionee must notify the Irish Subsidiary in writing within five business days of receiving or disposing of an interest in the Company (e.g., the Stock Option or Underlying Shares), or within five business days of
becoming aware of the event giving rise to the notification requirement, or within five business days of becoming a director or secretary if such an interest exists at the time. This notification requirement also applies with respect to the
interests of a spouse or minor children (whose interests, if any, will be attributed to the director, shadow director or secretary. 

[SIGNATURE PAGE FOLLOWS] 

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to
by the undersigned as of the date first above written. 
  

			
	ZENDESK, INC., San Francisco, CA
		
	By:	 	  

		 	Alan Black, CFO

 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, including, without limitation,
Section 9 thereof, and understands that the Stock Option granted hereby is subject to the terms of the Plan and of this Agreement. 
 The undersigned
also hereby acknowledges and agrees that the Underlying Shares are subject to transfer restrictions as set forth in Section 5 of the Agreement. 
 This
Agreement is hereby accepted, and the terms and conditions thereof and of the Plan, SPECIFICALLY INCLUDING THE ARBITRATION PROVISIONS IN SECTION 8 OF THIS AGREEMENT, are hereby agreed to, by the undersigned as of the date first above written. 

 

			
	OPTIONEE (Sign)	 	  

 
			
		
	Printed name:	 	  

 
			
		
	Address:	 	  

	
	  

 APPENDIX A 

ZENDESK, INC. 2009 STOCK OPTION AND GRANT PLAN 

 APPENDIX B 

STOCK OPTION EXERCISE NOTICE FOR VESTED AND EARLY EXERCISE 

To: Zendesk, Inc., attention Chief Financial Officer 

Pursuant to the terms of my stock option agreement(s) between the undersigned and Zendesk, Inc. (the “Company”) under the Zendesk,
Inc. 2009 Stock Option and Grant Plan, I hereby exercise such option by including herein payment in the form of a personal check representing the purchase price for the Underlying Shares being acquired. 

 

											
		 	 Name of Optionee:	 	  
	 		  	Today’s Date	  	  

  

											
	 	  	# of
Underlying
Shares	  	Strike Price
per
Underlying
Share	 	  	Extended
exercise price	 
	 Number of Underlying Shares underlying options granted
on                 , 20    
	  		  	$	 	  	  			
	  
 (if multiple options are
involved, please list separately)
	  		  				  			
				
	 Vested Underlying Shares that I am acquiring
	  		  	$	 	  	  	$	 	  
				
	 Unvested Underlying Shares that I am acquiring by exercising early
	  		  				  			
				
	 Underlying Shares that I am not acquiring now
	  		  				  			
				
	 Payment to Zendesk
	  		  				  	$	 	  

 In connection with my exercise of the option as set forth above, I hereby represent and warrant to the Company as follows:

 (i) I am purchasing the Underlying Shares for my own account for investment only, and not for resale or with a view to the
distribution thereof. 

 (ii) I have had such an opportunity as I have deemed adequate to obtain from the
Company such information as is necessary to permit me to evaluate the merits and risks of my investment in the Company and have consulted with my own advisers with respect to my investment in the Company, including tax advisers with regards to any
tax implications. 
 (iii) I have sufficient experience in business, financial and investment matters to be able to evaluate
the risks involved in the purchase of the Underlying Shares and to make an informed investment decision with respect to such purchase. 

(iv) I can afford a complete loss of the value of the Underlying Shares and am able to bear the economic risk of holding such
Underlying Shares for an indefinite period of time. 
 (v) I understand that the shares of Series B Common Stock that I
acquire upon exercise of the Stock Options (using Appendix B) as well as any shares of Series A Common Stock and Series B Common Stock that I have previously purchased, been granted, or that are subject to other awards made to you under
the Plan, may not be sold, transferred or otherwise disposed of without the advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that I may
transfer any such shares without such consent (i) to a Permitted Transferee (as defined in the Plan) or upon my death, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan, and (ii) subject to
the other transfer restrictions as set forth in Section 9 of the Plan, upon an Initial Public Offering. 
 (vi) I
understand that the Underlying Shares may not be registered under the Securities Act (it being understood that the Underlying Shares are being issued and sold in reliance on the exemption provided in Rule 701 thereunder) or any applicable state
securities or “blue sky” laws and may not be sold or otherwise transferred or disposed of in the absence of an effective registration statement under the Securities Act and under any applicable state securities or “blue sky” laws
(or exemptions from the registration requirement thereof). I further acknowledge that certificates representing Underlying Shares will bear restrictive legends reflecting the foregoing and/or that book entries for uncertificated Underlying Shares
will include similar restrictive notations. 
 (vii) To the extent required, I have executed and delivered to the Company the
Restricted Stock Agreement, attached as Appendix C to the Agreement. 
 (viii) I have read and understand the
Plan and acknowledge and agree that the Underlying Shares are subject to all of the relevant terms of the Plan, including without limitation, the transfer restrictions set forth in Section 9 of the Plan. 

(ix) I understand and agree that the Company has a right of first refusal with respect to the Underlying Shares pursuant to
Section 9(b) of the Plan. 
 (x) I understand and agree that the Company has certain repurchase rights with respect to
the Underlying Shares (including, without limitation, Underlying Shares deemed Restricted Stock issued pursuant to a Restricted Stock Award) pursuant to Section 9(c) of the Plan. 

 (xi) I understand and agree that I may not sell or otherwise transfer or dispose
of the Underlying Shares for a period of time following the effective date of a public offering by the Company as described in Section 9(f) of the Plan. 

 

	
	Sincerely yours,
	
	OPTIONEE:
	
	  

	Name:
	
	Address:
	
	  

	
	  

	
	  

 APPENDIX C 

RESTRICTED STOCK AGREEMENT FOR EARLY EXERCISE OF STOCK OPTION (IRELAND) 

UNDER THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 
  

			
	 Optionee Name
	  	 
	
Date of Original Grant
	  	 
	
Date of Early Exercise Notice
	  	 
	
Number of Restricted Shares purchased herein
	  	 
	 Price paid per
share
	  	 
	 Aggregate
purchase price
	  	 

 All capitalized terms used in this Restricted Stock Agreement for Early Exercise Option
(“Agreement”) and not otherwise defined shall have the respective meanings set forth in the Stock Option Agreement (including Appendices thereto) (the “Option Agreement”) between Zendesk, Inc. (the “Company”) and
undersigned Optionee granting Optionee Stock Options to purchase shares of Series B Common Stock under the Zendesk, Inc. 2009 Stock Option and Grant Plan (the “Plan”), as amended by the Amendment to Stock Option Agreement signed by the
Optionee (collectively, the “Option Agreement”). This Agreement shall be considered a Restricted Stock Award for all purposes under the Plan. 

Upon signing this Agreement and delivering the Stock Option Notice (“Exercise Notice”) to the Company, Company shall deliver to
Optionee Underlying Shares to be acquired upon exercise, subject to the following terms: 
 1. Purchase and Sale of Underlying Shares;
Vesting. 
 (a) Purchase and Sale. The Company hereby sells to the Optionee, and the Optionee is purchasing from the Company, the
number of Underlying Shares set forth in the Exercise Notice, pursuant to the Option Agreement, for the aggregate Option Exercise Price for the Underlying Shares so purchased. 

(b) Vesting. The risk of forfeiture shall lapse with respect to the Underlying Shares, and such Underlying Shares shall become vested,
on the respective dates indicated on the Vesting Schedule set forth in Appendix D to the Option Agreement. The Underlying Shares shall be considered Shares of Restricted Stock (as defined in the Plan) for purposes of this Agreement and the
Plan. 

 2. Repurchase Right. Upon a Termination Event or Repurchase Event, the Company shall have
the right to repurchase the Underlying Shares deemed to be Restricted Stock as set forth in Section 9(c) of the Plan. 
 3.
Restrictions on Transfer of Underlying Shares. The Underlying Shares (whether or not vested) may not be sold, transferred or otherwise disposed of without the advance express written consent of the Company, which consent may be given or
denied in the Company’s sole and absolute discretion; provided, however, that the Underlying Shares may be transferred without such consent (i) to a Permitted Transferee or upon death, in accordance with the terms and conditions of
Section 9(a)(ii)(A) and (B) of the Plan, and (ii) subject to the other transfer restrictions as set forth in Section 9 of the Plan, following a Initial Public Offering. The Underlying Shares (whether or not vested) shall remain
subject to the other transfer restrictions and other limitations including, without limitation, the provisions contained in Section 9 of the Plan. 

4. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Restricted Stock Agreement shall be subject to and
governed by all the terms and conditions of the Plan. 
 5. Escrow and Stock Assignment. The certificates for any Underlying Shares
shall be deposited in escrow with the Company to be held in escrow with the Company. Each deposited certificate shall be accompanied by a duly executed stock assignment separate from certificate in the form attached hereto as Appendix C-1 (the
“Assignment”). The deposited certificates and the Assignment, together with any other assets or securities from time to time deposited with the Company pursuant to this Agreement shall remain in escrow until such time or times as the
Underlying Shares are released from the Company’s right to repurchase the Underlying Shares as set forth in Section 9(c) of the Plan. If the Company (or its assignees) elects to exercise its right to repurchase the Underlying Shares as set
forth in Section 9(c) of the Plan then the escrowed certificates for such Underlying Shares being repurchased (together with any other assets or securities issued with respect thereto) shall be delivered to the Company, concurrently with the
payment to the Holder, in cash or cash equivalent (including the cancellation of any purchase-money indebtedness), of an amount equal to the applicable repurchase price for the Underlying Shares being repurchased, and the Optionee shall cease to
have any further rights or claims with respect to such Underlying Shares (or other assets or securities attributable to such Underlying Shares). 

6. Miscellaneous Provisions. 

(a) Record Owner; Dividends. The Optionee and any Permitted Transferees, during the duration of this Agreement, shall be considered the
record owners of and shall be entitled to vote the Underlying Shares if and to the extent the Underlying Shares are entitled to voting rights. The Optionee and any Permitted Transferees shall be entitled to receive all dividends and any other
distributions declared on the Underlying Shares; provided, however, that the Company is under no duty to declare any such dividends or to make any such distribution. 

(b) Section 83(b) Election. The Optionee shall consult with the Optionee’s tax advisor to determine whether it would be
appropriate for the Optionee to make an election 

 
under Section 83(b) of the Code with respect to the Underlying Shares. Any such election must be filed with the Internal Revenue Service within 30 days of the date of exercise. If the
Optionee makes an election under Section 83(b) of the Code, the Optionee shall give prompt notice to the Company (and provide a copy of such election to the Company). 

(c) Equitable Relief. The parties hereto agree and declare that legal remedies may be inadequate to enforce the provisions of this
Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(d) Change and Modifications. This Agreement may not be orally changed, modified or terminated, nor shall any oral waiver of any of its
terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Optionee. 

(e) Governing Law. This Agreement shall be governed by and construed in accordance with the General Corporation Law of the State of
Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of California, without regard to conflict of law principles that would result in the application of
any law other than the law of the State of California. 
 (f) Headings. The headings are intended only for convenience in finding the
subject matter and do not constitute part of the text of this Agreement and shall not be considered in the interpretation of this Agreement. 

(g) Saving Clause. If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall
in no manner affect the legality or enforceability of any other provision hereof. 
 (h) Notices. All notices, requests, consents and
other communications shall be in writing and be deemed given when delivered personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the
Optionee shall be addressed as set forth underneath their signatures below, or to such other address or addresses as may have been furnished by such party in writing to the other. 

(i) Benefit and Binding Effect. This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their
respective successors, assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become entitled to all the rights of the Company hereunder to the extent of such assignment. 

(j) Counterparts. For the convenience of the parties and to facilitate execution, this Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 

 7. Dispute Resolution. 

(a) Except as provided below, any dispute arising out of or relating to the Plan or the Underlying Shares, this Agreement, or the breach,
termination or validity of the Plan, the Underlying Shares or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the
“J.A.M.S. Rules”). The arbitration shall be governed by the United States Arbitration Act, 9 U.S.C. Sections 1 - 16, and judgment upon the award rendered by the arbitrators may be entered by any court having jurisdiction thereof. The place
of arbitration shall be San Francisco, California. 
 (b) The arbitration shall commence within 60 days of the date on which a written
demand for arbitration is filed by any party hereto. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party witnesses. In addition, each party may
take up to three depositions as of right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not have the power to order the answering of
interrogatories or the response to requests for admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven business days before the date of the arbitration, the identity of all
persons that may testify at the arbitration and a copy of all documents that may be introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and award shall be made and delivered within
six months of the selection of the arbitrator. The arbitrator’s decision shall set forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of actual compensatory
damages and shall not multiply actual damages or award punitive damages, and each party hereby irrevocably waives any claim to such damages. 

(c) The Company, the Optionee, each party to the Agreement and any other holder of Underlying Shares issued pursuant to this Agreement (each,
a “Party”) covenants and agrees that such party will participate in the arbitration in good faith. This Section 7 applies equally to requests for temporary, preliminary or permanent injunctive relief, except that in the case of
temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding immediate and irreparable harm. 

(d) Each Party (i) hereby irrevocably submits to the jurisdiction of any United States District Court of competent jurisdiction for the
purpose of enforcing the award or decision in any such proceeding, (ii) hereby waives, and agrees not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject personally
to the jurisdiction of the above named courts, that its property is exempt or immune from attachment or execution (except as protected by applicable law), that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the
suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court, and (iii) hereby waives and agrees not to seek any review by any court of any other jurisdiction which may be
called upon to grant an enforcement of the judgment of any such court. Each Party hereby consents to service of process by registered mail at the address to which notices are to be given. Each Party agrees that its, his or her submission to
jurisdiction 

 
and its, his or her consent to service of process by mail is made for the express benefit of each other Party. Final judgment against any Party in any such action, suit or proceeding may be
enforced in other jurisdictions by suit, action or proceeding on the judgment, or in any other manner provided by or pursuant to the laws of such other jurisdiction. 

[SIGNATURE PAGE FOLLOWS] 

 The foregoing Restricted Stock Agreement is hereby accepted and the terms and conditions thereof
are hereby agreed to by the undersigned as of the date first above written. 
  

			
	ZENDESK, INC.
		
	By:	 	  

		 	Chief Financial Officer

 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, including, without limitation,
Section 9 thereof and understands that the Underlying Shares purchased hereby are subject to the terms of the Plan and this Agreement. This Agreement is hereby accepted, and the terms and conditions of the Plan, the Option Agreement and this
Agreement, SPECIFICALLY INCLUDING THE ARBITRATION PROVISIONS SET FORTH IN SECTION 7 OF THIS AGREEMENT, are hereby agreed to, by the undersigned as of the date first above written. 

 

	
	OPTIONEE:
	
	  

	Name:
	
	Address:
	
	  

	
	  

	
	  

 Appendix 1 to 

Restricted Stock Agreement 

STOCK ASSIGNMENT SEPARATE FROM CERTIFICATE 

FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers unto Zendesk, Inc.
                 shares of Common Stock of the Company standing in the undersigned’s name on the books of the Company represented by Certificate(s)
No.      herewith and hereby irrevocably constitutes and appoints the Secretary and other officers of the Company attorneys to transfer said stock on the books of the Company with full power of substitution in the premises.

  

			
	Date:	 	  

		
	By:	 	  

			
		
	Print Stockholder Name:	 	  

 INSTRUCTIONS: Stockholder to sign and print name only. All other blanks and date should be left blank. To be completed by
Company upon exercise of repurchase right. 

 APPENDIX D 

STOCK OPTION GRANT NOTICE 
  

			
	Name of Optionee:	  	_____________________________________________    
		
	No. of Underlying Shares	  	_______________ Shares of Series B Common Stock
		
	Grant Date:	  	___________________________, 201___
		
	Expiration Date:	  	___________________________, 202___ [NOT TO EXCEED 7 YEARS FROM GRANT]
		
	Vesting begins on:	  	___________________________, 201___ (Vesting Commencement Date)
		
	Option Exercise Price/Share:	  	$0.__________

 Vesting Schedule: 

Subject to the determination of the Committee in its sole discretion to accelerate the vesting schedule hereunder, this Stock Option shall be vested with
respect to the Underlying Shares on the respective dates indicated below: 
 (i) 25% of the Underlying Shares shall vest on the first anniversary of the
Vesting Commencement Date; and 
 (ii) 2.0833% of the Underlying Shares shall vest each completed month for 36 months following the first anniversary of the
Vesting Commencement Date, 
 so long as the Optionee maintains a Service Relationship on each such date. 

Notwithstanding anything in the Agreement to the contrary in the case of a Sale Event, this Stock Option shall be treated as provided in
Section 3(c) of the Plan. 

 RESTRICTED STOCK UNIT AWARD AGREEMENT 

UNDER THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 

(IRELAND) 
 Pursuant to the
Zendesk, Inc. 2009 Stock Option and Grant Plan, as amended (the “Plan,” attached herein and marked Appendix A), Zendesk, Inc., a Delaware corporation (together with any successor thereto, the “Company”), hereby grants
to the undersigned grantee (the “Grantee”), an award of the number of Restricted Stock Units (an “Award”) indicated on the Restricted Stock Unit Grant Notice (“Grant Notice,” attached herein and marked as Appendix
B), subject to the terms and conditions set forth in this Restricted Stock Unit Award Agreement (this “Agreement”) and in the Plan. Each Restricted Stock Unit shall relate to one share (a “Share”) of Series B Common Stock.

 All capitalized terms used herein and not otherwise defined shall have the respective meanings set forth in the Notice and the Plan. 

1. Conditions and Vesting of Restricted Stock Units. The Restricted Stock Units are subject to both a time-based condition (the
“Time Condition”) and performance-based vesting (the “Performance Vesting”) described in paragraphs (a) and (b) below, both of which must be satisfied prior to the Expiration Date before the Restricted Stock Units will
be deemed vested and may be settled in accordance with Section 3 of this Agreement. 
 (a) Time Condition. The Time Condition
shall be satisfied in accordance with the Time-Based Vesting Schedule set forth in the Grant Notice. 
 (b) Performance Vesting. The
Restricted Stock Units shall only satisfy the Performance Vesting on the first to occur of (i) immediately prior to a Sale Event or (ii) the completion of Company’s Initial Public Offering, in either case, occurring prior to the
Expiration Date. 
 (c) Vesting Date. Each date as of which both the Time Condition and Performance Vesting described in paragraphs
(a) and (b) have been satisfied with respect to any Restricted Stock Units shall be referred to as a “Vesting Date.” No Vesting Date shall occur after the Expiration Date. To the extent the Restricted Stock Units have not
satisfied both the Time Condition and the Performance Vesting, such Restricted Stock Units shall expire and be of no further force or effect on the Expiration Date. 

2. Termination of Service Relationship. If the Grantee’s Service Relationship terminates for any reason (including death or
disability) prior to the satisfaction of the Time Condition set forth in Section 1(a) above, any Restricted Stock Units that have not satisfied the Time Condition as of such date shall automatically and without notice terminate and be
forfeited, and neither the Grantee nor any of his or her successors, heirs, assigns, or personal representatives will thereafter have any further rights or interests in such forfeited Restricted Stock Units. Any Restricted Stock Units that have
satisfied the Time Condition as of such date shall remain subject to the Performance Vesting set forth in Section 1(b) above, but shall expire 

 
and be of no further force or effect on the first to occur of (a) three years after the date on which the Grantee’s Service Relationship terminates, or (b) the Expiration Date.

 For purposes of the foregoing, the Grantee’s Service Relationship will be considered terminated as of the date the Grantee is no
longer actively providing services to the Company or any Subsidiary (regardless of the reason for such termination and whether or not later to be found invalid or in breach of employment laws in the jurisdiction where the Grantee is employed or the
terms of the Grantees’s employment agreement, if any). Unless otherwise expressly provided in this Agreement or determined by the Company, the Grantee’s right to vest in the Restricted Stock Units under the Plan, if any, will terminate as
of such date and will not be extended by any notice period (e.g., the Grantee’s period of service would not include any contractual notice period or any period of “garden leave” or similar period mandated under employment laws
in the jurisdiction where the Grantee is employed or the terms of the Grantee’s employment agreement, if any); the Committee shall have the exclusive discretion to determine when the Grantee is no longer actively providing services for purposes
of the Restricted Stock Unit grant (including whether Participant may still be considered to be providing services while on a leave of absence). 

3. Receipt of Shares of Stock. As soon as reasonably practicable following each Vesting Date, the Company shall issue to the Grantee
the number of Shares equal to the aggregate number of Restricted Stock Units that have satisfied the Time Condition and Performance Vesting pursuant to Section 1 of this Agreement and which have not been previously issued by the Company to the
Grantee and the Grantee shall thereafter have all the rights of a stockholder of the Company with respect to such Shares. 
 4.
Incorporation of Plan. Notwithstanding anything herein to the contrary, this Award shall be subject to and governed by all the terms and conditions of the Plan. 

5. Transfer Restrictions. 

(a) Award Not Transferrable. The Award may not be sold, transferred, pledged, assigned or otherwise encumbered or disposed of by the
Grantee. 
 (b) Beneficiary Designation. This Award is personal to the Grantee and the Grantee shall not be permitted to designate a
beneficiary. In the event of the Grantee’s death after a Vesting Date but before the settlement of this Award in accordance with the terms and conditions of this Award, the legal representative of the Grantee or the Grantee’s estate shall
be entitled to the benefits under this Award. 
 (c) Restrictions on Transfer of Shares. The Shares acquired upon settlement of the
Restricted Stock Units may not be sold, transferred or otherwise encumbered or disposed of until (i) the Restricted Stock Units have vested as provided in Section 1 of this Agreement; (ii) Shares have been issued to the Grantee in
accordance with the terms of the Plan and this Agreement; and (iii) the Grantee has obtained the advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided,
however, that the Grantee may transfer the Shares without such consent specified in this subparagraph (iii): (x) to a Permitted Transferee or upon the death of the Grantee, in accordance with the terms and conditions of Section 9(a)(ii)(A)
and (B) of the Plan, and (y) following an Initial Public Offering. In addition, the Shares shall be subject to certain additional 

 
transfer restrictions and other limitations including, without limitation, the provisions contained in Section 9 of the Plan. 

6. Grantee Responsible for Tax-Related Items. Regardless of any action that the Company or the Grantee’s actual employer (the
“Employer”) takes with respect to any or all income tax, social insurance, payroll tax, payment on account, or other tax-related items related to the Grantee’s participation in the Plan and legally applicable to him or her
(“Tax-Related Items”), the Grantee acknowledges that the ultimate liability for all Tax-Related Items is and remains the Grantee’s responsibility and may exceed the amount actually withheld by the Company or the Employer. The Grantee
further acknowledges that the Company and/or the Employer (i) make no representations or undertakings regarding the treatment of any Tax-Related Items in connection with any aspect of the Restricted Stock Units, including, without limitation,
the grant, vesting, or settlement of the Restricted Stock Units, the subsequent sale of Shares acquired pursuant to such issuance, and the receipt of any dividends; and (ii) do not commit to and are under no obligation to structure the terms of
the grant or any aspect of the Restricted Stock Units to reduce or eliminate the Grantee’s liability for Tax-Related Items or achieve any particular tax result. The Company or Employer may satisfy all Tax-Related Items for which they have the
obligation or authority to withhold or remit payment, in their sole discretion, (i) by withholding Shares from those Shares to be issued to the Grantee upon settlement of the Award; (ii) with respect to a Grantee who is not an executive
officer or director of the Company nor subject to the reporting requirements of Section 16 of the Exchange Act at the time of such withholding, by the Company causing its transfer agent to sell from the number of Shares to be issued to the
Grantee, the number of Shares necessary to satisfy the applicable Tax Related Items; or (iii) by requiring the Grantee to pay to the Company or Employer, or make arrangements satisfactory to the Committee for payment of, the required Tax
Related Items. The Grantee shall not make any claim against the Employer, the Company or its Board of Directors, officers, affiliates or employees related to Tax-Related Items arising from this Award or the Grantee’s other compensation.
Furthermore, if the Grantee has become subject to tax in more than one jurisdiction between the Grant Date and the date of any relevant taxable or tax withholding event, as applicable, the Grantee acknowledges that the Company and/or the Employer
(or former employer, as applicable) may be required to withhold or account for Tax-Related Items in more than one jurisdiction. 
 Depending
on the withholding method, the Company may withhold or account for Tax-Related Items by considering applicable minimum statutory withholding rates or other applicable withholding rates, including maximum applicable rates, in which case the Grantee
will receive a refund of any over-withheld amount in cash and will have no entitlement to the Series B Common Stock equivalent. If the obligation for Tax-Related Items is satisfied by withholding in Shares, for tax purposes, the Grantee will be
deemed to have been issued the full number of Shares subject to the vested Restricted Stock Units, notwithstanding that a number of the Shares are held back solely for the purpose of paying the Tax-Related Items. The Company may refuse to issue or
deliver the Shares or the proceeds of the sale of Shares if the Grantee fails to comply with his or her obligations in connection with the Tax-Related Items. 

7. Miscellaneous Provisions. 

(a) Equitable Relief. The parties hereto agree and declare that legal remedies may be inadequate to enforce the provisions of this
Agreement and that equitable relief, 

 
including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(b) Adjustments for Changes in Capital Structure. If, as a result of any reorganization, recapitalization, reincorporation,
reclassification, stock dividend, stock split, reverse stock split or other similar change in the Series B Common Stock, the outstanding shares of Series B Common Stock are increased or decreased or are exchanged for a different number or kind of
securities of the Company, the restrictions contained in this Agreement shall apply with equal force to additional and/or substitute securities, if any, received by the Grantee in exchange for, or by virtue of his or her ownership of, this Award or
Shares acquired pursuant thereto. 
 (c) Change and Modifications. This Agreement may not be orally changed, modified or terminated,
nor shall any oral waiver of any of its terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Grantee. 

(d) Governing Law. This Agreement shall be governed by and construed in accordance with the General Corporation Law of the State of
Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of California, without regard to conflict of law principles that would result in the application of
any law other than the law of the State of California. 
 8. Dispute Resolution. 

(a) Except as provided below, any dispute arising out of or relating to the Plan, this Agreement, or the breach, termination or validity of
the Plan or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the “J.A.M.S. Rules”). The arbitration shall be
governed by the United States Arbitration Act, 9 U.S.C. Sections 1 16, and judgment upon the award rendered by the arbitrators may be entered by any court having jurisdiction thereof. The place of arbitration shall be San Francisco, California. 

(b) The arbitration shall commence within sixty (60) days of the date on which a written demand for arbitration is filed by any party to
this Agreement. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party witnesses. In addition, each party may take up to three depositions as of
right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not have the power to order the answering of interrogatories or the response to requests for
admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven business days before the date of the arbitration, the identity of all persons that may testify at the arbitration and a copy
of all documents that may be introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and award shall be made and delivered within six months of the selection of the arbitrator. The
arbitrator’s decision shall set forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of actual compensatory damages and shall not multiply actual damages or
award punitive damages, and each party hereby irrevocably waives any claim to such damages. 

 (c) The Company and the Grantee (each being a party to the Agreement), and any other holder of
Shares issued pursuant to this Agreement (each, a “Party”) covenants and agrees that such Party will participate in the arbitration in good faith. This Section 8 applies equally to requests for temporary, preliminary or permanent
injunctive relief, except that in the case of temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding immediate and irreparable harm. 

(d) Each Party (A) hereby irrevocably submits to the jurisdiction of any United States District Court in San Francisco County, California
for the purpose of enforcing the award or decision in any such proceeding, (B) hereby waives, and agrees not to assert, to the greatest degree allowed by applicable law (including any Irish law), by way of motion, as a defense, or otherwise, in
any such suit, action or proceeding, any claim that it is not subject personally to the jurisdiction of the above named courts, that its property is exempt or immune from attachment or execution (except as protected by applicable law), that the
suit, action or proceeding is brought in an inconvenient forum, that the venue of the suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court, and (C) hereby waives and
agrees not to seek, to the greatest degree allowed by applicable law (including any Irish law), any review by any court of any other jurisdiction which may be called upon to grant an enforcement of the judgment of any such court. Each Party hereby
consents to service of process by registered mail at the address to which notices are to be given. Each Party agrees that its, his or her submission to jurisdiction and its, his or her consent to service of process by mail is made for the express
benefit of all Parties and is essential to the overall purpose of this Agreement. Final judgment against any Party in any such action, suit or proceeding may be enforced in other jurisdictions by suit, action or proceeding on the judgment, or in any
other manner provided by or pursuant to the laws of such other jurisdiction. 
 (e) Headings. The headings are intended only for
convenience in finding the subject matter and do not constitute part of the text of this Agreement and shall not be considered in the interpretation of this Agreement. 

(f) Saving Clause. If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall
in no manner affect the legality or enforceability of any other provision hereof. 
 (g) Notices. All notices, requests, consents and
other communications shall be in writing and be deemed given when delivered personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the Grantee
shall be addressed as set forth underneath their signatures below, or to such other address or addresses as may have been furnished by such party in writing to the other. 

(h) Benefit and Binding Effect. This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their
respective successors, permitted assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become entitled to all the rights of the Company hereunder to the extent of such assignment. 

 (i) Counterparts. For the convenience of the parties and to facilitate execution, this
Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 

(j) Integration. This Agreement constitutes the entire agreement between the parties with respect to this Award and supersedes all
prior agreements and discussions between the parties concerning such subject matter. 
 9. Acknowledgements of the Grantee. 

(a) The Grantee represents and agrees that the Shares to be acquired upon settlement of this Award will be acquired for investment, and not
with a view to the sale or distribution thereof. 
 (b) In the event that the sale or issuance of Shares under the Plan is not registered
under the Securities Act but an exemption is available that requires an investment representation or other representation, the Grantee shall represent and agree at the time of settlement of this Award resulting in the transfer of Shares that the
Shares being acquired are being acquired for investment, and not with a view to the sale or distribution thereof, and shall make such other representations as are deemed necessary or appropriate by the Company and its counsel. 

(c) Neither the Company nor any Subsidiary of Affiliate is obligated by or as a result of the Plan or this Agreement to continue the
Grantee’s Service Relationship, and neither the Plan nor this Agreement shall interfere in any way with the right of the Company or any Subsidiary or Affiliate to terminate the Service Relationship of the Grantee at any time. 

(d) The Granteee understands that the Shares may not be registered under the Securities Act (it being understood that the Shares are being
issued and sold in reliance on the exemption provided in Rule 701 thereunder) or any applicable state securities or “blue sky” laws and may not be sold or otherwise transferred or disposed of in the absence of an effective registration
statement under the Securities Act and under any applicable state securities or “blue sky” laws (or exemptions from the registration requirement thereof). 

(e) The Grantee understands and agrees that he or she may not sell or otherwise transfer or dispose of the Shares for a period of time
following the effective date of a public offering by the Company as described in Section 9(f) of the Plan. 
 10. Nature of
Grant. In accepting the Award, the Grantee acknowledges, understands and agrees that: 
 (a) the Plan is established voluntarily by the
Company, it is discretionary in nature and it may be modified, amended, suspended or terminated by the Company at any time, to the extent permitted by the Plan; 

(b) the grant of the Restricted Stock Units is voluntary and occasional and does not create any contractual or other right to receive future
grants of restricted stock units, or benefits in lieu of restricted stock units, even if restricted stock units have been granted in the past; 

 (c) all decisions with respect to future Restricted Stock Units or other grants, if any, will be
at the sole discretion of the Company; 
 (d) the Grantee is voluntarily participating in the Plan; 

(e) the Restricted Stock Units and the Shares subject to the Restricted Stock Units are not intended to replace any pension rights or
compensation; 
 (f) the Restricted Stock Units and the Shares subject to the Restricted Stock Units, and the income and value of same, are
not part of normal or expected compensation for any purposes, including calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses, long-service awards, pension or retirement or welfare benefits or
similar payments; 
 (g) the future value of the underlying Shares is unknown, indeterminable and cannot be predicted with certainty; 

(h) no claim or entitlement to compensation or damages shall arise from forfeiture of the Award resulting from the termination of the
Grantee’s Service Relationship (for any reason whatsoever whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Grantee is employed or the terms of the Grantee’s employment agreement, if
any), and in consideration of the grant of the Restricted Stock Units to which the Grantee is otherwise not entitled, the Grantee irrevocably agrees never to institute any claim against the Company, any Subsidiary or Affiliate, waives his or
her ability, if any, to bring any such claim, and releases the Company, its Subsidiaries and Affiliates from any such claim; if, notwithstanding the foregoing, any such claim is allowed by a court of competent jurisdiction, then, by participating in
the Plan, the Grantee shall be deemed irrevocably to have agreed not to pursue such claim and agrees to execute any and all documents necessary to request dismissal or withdrawal of such claim; 

(i) unless otherwise provided in the Plan or by the Company in its discretion, the Award and the benefits evidenced by this Agreement do not
create any entitlement to have the Restricted Stock Units or any such benefits transferred to, or assumed by, another company nor be exchanged, cashed out or substituted for, in connection with any corporate transaction affecting the Series B
Common Stock; and 
 (j) neither the Company, nor any Subsidiary or Affiliate shall be liable for any foreign exchange rate fluctuation
between the Grantee’s local currency and the United States Dollar that may affect the value of the Restricted Stock Units or of any amounts due to the Grantee pursuant to the settlement of the Restricted Stock Units or the subsequent sale of
any Shares acquired upon settlement. 
 11. No Advice Regarding Grant. The Company is not providing any tax, legal or financial
advice, nor is the Company making any recommendations regarding the Grantee’s participation in the Plan, or the Grantee’s acquisition or sale of the underlying Shares. The Grantee is hereby advised to consult with his or her own personal
tax, legal and financial advisors regarding his or her participation in the Plan before taking any action related to the Plan. 
 12.
Data Protection. 

 (a) By entering into this Agreement, and as a condition of the grant of the Award, Grantee
consents to the collection, use, and transfer of Data as described in this paragraph to the full extent permitted by and in full compliance with applicable laws. 

(b) Grantee understands that the Company and its Subsidiaries hold Data about the Grantee for the purpose of managing and administering the
Plan. 
 (c) Grantee further understands that the Company and/or its Subsidiaries will transfer Data among themselves as necessary for the
purposes of implementation, administration, and management of Grantee’s participation in the Plan, and that the Company and/or its Subsidiary may each further transfer Data to any Data Recipients. 

(d) Grantee understands that these Data Recipients may be located in Grantee’s country of residence or elsewhere, such as the United
States. Grantee authorizes the Data Recipients to receive, possess, use, retain, and transfer Data in electronic or other form, for the purposes of implementing, administering, and managing Grantee’s participation in the Plan, including any
transfer of such Data, as may be required for the administration of the Plan and/or the subsequent holding of Shares on Grantee’s behalf, to a broker or third party with whom the Shares acquired at settlement may be deposited. Where the
transfer is to be to a destination outside the European Economic Area, the Company shall take reasonable steps to ensure that the Grantee’s Data continues to be adequately protected and securely held. 

(e) Grantee understands that Grantee may, at any time, review the Data, request that any necessary amendments be made to it, or withdraw
Grantee’s consent herein in writing by contacting the Company. Grantee further understands that withdrawing consent may affect Grantee’s ability to participate in the Plan. 

(f) For purposes of this Agreement, the terms (i) “Data” shall mean certain personal information about the Grantee, including,
but not limited to, name, home address and telephone number, date of birth, social insurance number, salary, nationality, job title, any stock, units or directorships held in the Company, details of all options or other entitlement to shares
awarded, cancelled, exercised, vested, unvested, or outstanding in the Grantee’s favor; and (ii) “Data Recipient” shall mean third parties assisting the Company in the implementation, administration, and management of the Plan.

 13. Director Notification Requirement. If the Grantee is a director, shadow director or secretary of an Irish Subsidiary, the
Grantee must notify the Irish Subsidiary in writing within five business days of receiving or disposing of an interest in the Company (e.g., the Restricted Stock Units or Underlying Shares), or within five business days of becoming aware of
the event giving rise to the notification requirement, or within five business days of becoming a director or secretary if such an interest exists at the time. This notification requirement also applies with respect to the interests of a spouse
or minor children (whose interests, if any, will be attributed to the director, shadow director or secretary. 
 [SIGNATURE PAGE FOLLOWS]

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to
by the undersigned as of the date first above written. 
  

			
	ZENDESK, INC., San Francisco, CA
		
	By:	 	  

		 	Alan Black, CFO

 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, including, without limitation,
Section 9 thereof, and understands that the Award granted hereby is subject to the terms of the Plan and of this Agreement. 
 The undersigned also
hereby acknowledges and agrees that the Shares are subject to transfer restrictions as set forth in Section 5 of the Agreement. 
 This Agreement is
hereby accepted, and the terms and conditions thereof and of the Plan, SPECIFICALLY INCLUDING THE ARBITRATION PROVISIONS IN SECTION 8 OF THIS AGREEMENT, are hereby agreed to, by the undersigned as of the date first above written. 

 

			
	GRANTEE (Sign)	 	  

 
			
		
	Printed name:	 	  

 
			
		
	Address:	 	  

	
	         

 APPENDIX A 

ZENDESK, INC. 2009 STOCK OPTION AND GRANT PLAN 

 APPENDIX B 

RESTRICTED STOCK UNIT GRANT NOTICE 
  

					
	Name of Grantee:	  	  
	  	
			
	No. of Restricted Stock Units	  	  
	  	
			
	Grant Date:	  	  
	  	
			
	Expiration Date:	  	  
	  	[seventh anniversary of Grant Date]
			
	Vesting Commencement Date:	  	  
	  	[Always on the 15th day of the month]

 Time-Based Vesting Schedule: 

Subject to the determination of the Committee in its sole discretion to accelerate the vesting schedule hereunder: 

[25 percent] of the Restricted Stock Units shall satisfy the Time Condition on the first anniversary of the Vesting Commencement Date (the
“Initial Time Vesting Date”) provided that the Grantee continues to have a Service Relationship with the Company or the Employer on the Initial Time Vesting Date 

[2.0833%] of the Restricted Stock Units shall satisfy the Time Condition each completed month for [36] months following the one-year anniversary
of the Vesting Commencement Date (each date, a “Time Vesting Date”), for so long as the Grantee continues to have a Service Relationship with the Company or the Employer.  

Notwithstanding the foregoing, the Time Condition shall only be satisfied with respect to whole Restricted Stock Units and any rounding down to a number of
whole Restricted Stock Units shall correspondingly increase the number of Restricted Stock Units allocated to the [36th] Time Vesting Date. 

Notwithstanding anything in this Notice or the Agreement to the contrary, in the case of a Sale Event, this Award shall be treated as provided
in Section 3(c) of the Plan; provided that any Restricted Stock Units that have satisfied the Time Condition as of the consummation of such Sale Event shall either be assumed, continued or substituted for in accordance with
Section 3(c)(iii)(A) of the Plan or cancelled in exchange for a cash payment in accordance with Section 3(c)(iii)(C) of the Plan. [In addition, insert any special acceleration rights here.] 

Performance Vesting: As set forth in the Agreement. 

 RESTRICTED STOCK UNIT AWARD AGREEMENT - SINGAPORE 

UNDER THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 

Pursuant to the Zendesk, Inc. 2009 Stock Option and Grant Plan, as amended (the “Plan,” attached herein and marked
Appendix A), Zendesk, Inc., a Delaware corporation (together with any successor thereto, the “Company”), hereby grants to the undersigned grantee (the “Grantee”), an award of the number of Restricted Stock Units (an
“Award”) indicated on the Restricted Stock Unit Grant Notice (“Grant Notice,” attached herein and marked as Appendix B), subject to the terms and conditions set forth in this Restricted Stock Unit Award Agreement -
Singapore (this “Agreement”) and in the Plan. Each Restricted Stock Unit shall relate to one share (a “Share”) of Series B Common Stock. 

All capitalized terms used herein and not otherwise defined shall have the respective meanings set forth in the Grant Notice and the Plan.

 1. Conditions and Vesting of Restricted Stock Units. The Restricted Stock Units are subject to both a time-based condition (the
“Time Condition”) and performance-based vesting (the “Performance Vesting”) described in paragraphs (a) and (b) below, both of which must be satisfied prior to the Expiration Date before the Restricted Stock Units will
be deemed vested and may be settled in accordance with Section 3 of this Agreement. 
 (a) Time Condition. The Time Condition
shall be satisfied in accordance with the Time-Based Vesting Schedule set forth in the Grant Notice. 
 (b) Performance Vesting. The
Restricted Stock Units shall only satisfy the Performance Vesting on the first to occur of (i) immediately prior to a Sale Event or (ii) the Company’s Initial Public Offering, in either case, occurring prior to the Expiration Date.

 (c) Vesting Date. Each date as of which both the Time Condition and Performance Vesting described in paragraphs (a) and
(b) have been satisfied with respect to any Restricted Stock Units shall be referred to as a “Vesting Date.” No Vesting Date shall occur after the Expiration Date. To the extent the Restricted Stock Units have not satisfied both the
Time Condition and the Performance Vesting, such Restricted Stock Units shall expire and be of no further force or effect on the Expiration Date. 

2. Termination of Service Relationship. If the Grantee’s Service Relationship terminates for any reason (including death or
disability) prior to the satisfaction of the Time Condition set forth in Section 1(a) above, any Restricted Stock Units that have not satisfied the Time Condition as of such date shall automatically and without notice terminate and be
forfeited, and neither the Grantee nor any of his or her successors, heirs, assigns, or personal representatives will thereafter have any further rights or interests in such forfeited Restricted Stock Units. Any Restricted Stock Units that have
satisfied the Time Condition as of such date shall remain subject to the Performance Vesting set forth in Section 1(b) above, but shall expire and be of no further force or effect on the first to occur of (a) three years after the date on
which the Grantee’s Service Relationship terminates, or (b) the Expiration Date. 

 For purposes of the foregoing, the Grantee’s Service Relationship will be considered
terminated as of the date Grantee is no longer actively providing services to the Company or any Subsidiary or Affiliate (regardless of the reason for such termination and whether or not later to be found invalid or in breach of employment laws in
the jurisdiction where the Grantee is employed or the terms of the Grantees’s employment agreement, if any). Unless otherwise determined by the Company, the Grantee’s right to vest in the Restricted Stock Units under the Plan, if any, will
terminate as of such date and will not be extended by any notice period (e.g., the Grantee’s period of service would not include any contractual notice period or any period of “garden leave” or similar period mandated under
employment laws in the jurisdiction where the Grantee is employed or the terms of the Grantee’s employment agreement, if any). The Committee shall have the exclusive discretion to determine when the Grantee is no longer actively providing
services for purposes of the Restricted Stock Unit grant (including whether the Grantee may still be considered to be providing services while on a leave of absence). 

3. Receipt of Shares of Stock. As soon as practicable following each Vesting Date, but in no event later than March 15th of the
year following the calendar year in which the Vesting Date occurs, the Company shall issue to the Grantee the number of Shares equal to the aggregate number of Restricted Stock Units that have satisfied the Time Condition and Performance Vesting
pursuant to Section 1 of this Agreement on such Vesting Date and the Grantee shall thereafter have all the rights of a stockholder of the Company with respect to such Shares. Subject to the foregoing, the Company generally expects to issue such
Shares on a quarterly basis during the second month of each quarter following a Vesting Date(s); however, this schedule could be modified based on certain securities law restrictions. 

4. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Award shall be subject to and governed by all the terms
and conditions of the Plan. 
 5. Transfer Restrictions. 

(a) Award Not Transferrable. The Award may not be sold, transferred, pledged, assigned or otherwise encumbered or disposed of by the
Grantee. 
 (b) Beneficiary Designation. This Award is personal to the Grantee and the Grantee shall not be permitted to designate a
beneficiary. In the event of the Grantee’s death after a Vesting Date but before the settlement of this Award in accordance with the terms and conditions of this Award, the legal representative of the Grantee or the Grantee’s estate shall
be entitled to the benefits under this Award. 
 (c) Restrictions on Transfer of Shares. The Shares acquired upon settlement of the
Restricted Stock Units may not be sold, transferred or otherwise encumbered or disposed of until (i) the Restricted Stock Units have vested as provided in Section 1 of this Agreement; (ii) Shares have been issued to the Grantee in
accordance with the terms of the Plan and this Agreement; and (iii) the Grantee has obtained the advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided,
however, that the Grantee may transfer the Shares without such consent specified in this subparagraph (iii): (x) to a Permitted Transferee or upon the death of the Grantee, in accordance with the terms and conditions of Section 9(a)(ii)(A)
and (B) of the Plan, and (y) following an Initial Public Offering. In addition, the Shares shall be subject to certain additional 

 
transfer restrictions and other limitations including, without limitation, the provisions contained in Section 9 of the Plan. 

6. Tax Withholding. 
 (a)
Grantee Responsible for Tax-Related Items. Regardless of any action that the Company or the Grantee’s actual employer (the “Employer”) takes with respect to any or all income tax, social insurance, payroll tax, payment on
account, or other tax-related items related to the Grantee’s participation in the Plan and legally applicable to him or her (“Tax-Related Items”), the Grantee acknowledges that the ultimate liability for all Tax-Related Items is and
remains the Grantee’s responsibility and may exceed the amount actually withheld by the Company or the Employer. The Grantee further acknowledges that the Company and/or the Employer (i) make no representations or undertakings regarding
the treatment of any Tax-Related Items in connection with any aspect of the Restricted Stock Units, including, without limitation, the grant, vesting, or settlement of the Restricted Stock Units, the subsequent sale of Shares acquired pursuant to
such issuance, and the receipt of any dividends; and (ii) do not commit to and are under no obligation to structure the terms of the grant or any aspect of the Restricted Stock Units to reduce or eliminate the Grantee’s liability for
Tax-Related Items or achieve any particular tax result. The Grantee shall not make any claim against the Company or its Board of Directors, officers or employees related to Tax-Related Items arising from this Award or the Grantee’s other
compensation. Furthermore, if the Grantee has become subject to tax in more than one jurisdiction between the Grant Date and the date of any relevant taxable or tax withholding event, as applicable, the Grantee acknowledges that the Company and/or
the Employer (or former employer, as applicable) may be required to withhold or account for Tax-Related Items in more than one jurisdiction. 

(b) Withholding. The Grantee shall, not later than the date as of which the receipt or settlement of this Award becomes a taxable event
to the Grantee, satisfy any Tax-Related Items due in connection with the Award. The Grantee authorizes the Company and the Employer to satisfy this withholding obligation for Tax-Related Items, at their discretion, (i) by withholding Shares
from those Shares to be issued to the Grantee upon settlement of the Award; (ii) with respect to a Grantee who is not an executive officer or director of the Company nor subject to the reporting requirements of Section 16 of the Exchange
Act at the time of such withholding, by the Company causing its transfer agent to sell from the number of Shares to be issued to the Grantee, the number of Shares necessary to satisfy the Tax-Related Items required by law to be withheld from the
Grantee on account of such transfer; or (iii) by requiring the Grantee to pay to the Company, or make arrangements satisfactory to the Committee for payment of, the Tax-Related Items. 

Depending on the withholding method, the Company may withhold or account for Tax-Related Items by considering applicable minimum statutory
withholding rates or other applicable withholding rates, including maximum applicable rates, in which case the Grantee will receive a refund of any over-withheld amount in cash and will have no entitlement to the Series B Common Stock
equivalent. If the obligation for Tax-Related Items is satisfied by withholding in Shares, for tax purposes, the Grantee will be deemed to have been issued the full number of Shares subject to the vested Restricted Stock Units, notwithstanding that
a number of the Shares are held back solely for the purpose of paying the Tax-Related Items. The Company may refuse 

 
to issue or deliver the Shares or the proceeds of the sale of Shares if the Grantee fails to comply with his or her obligations in connection with the Tax-Related Items. 

7. Section 409A of the Code. This Award is intended to constitute a “short term deferral” for purposes of
Section 409A of the Code to the greatest extent possible and the Award will be administered and interpreted in accordance with that intent. To the extent that any provision of this Agreement is ambiguous as to its exemption from
Section 409A of the Code, the provision shall be read in such a manner so that all payments hereunder are exempt from Section 409A of the Code. Solely for purposes of Section 409A of the Code, each issuance of Shares on (or shortly
following) a Vesting Date shall be considered a separate payment. The Company makes no representation or warranty and shall have no liability to the Grantee or any other person if any provisions of this Award are determined to constitute deferred
compensation subject to Section 409A of the Code but do not satisfy an exemption from, or the conditions of, such Section. 
 8.
Miscellaneous Provisions. 
 (a) Equitable Relief. The parties hereto agree and declare that legal remedies may be inadequate
to enforce the provisions of this Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(b) Adjustments for Changes in Capital Structure. If, as a result of any reorganization, recapitalization, reincorporation,
reclassification, stock dividend, stock split, reverse stock split or other similar change in the Series B Common Stock, the outstanding shares of Series B Common Stock are increased or decreased or are exchanged for a different number or kind
of securities of the Company, the restrictions contained in this Agreement shall apply with equal force to additional and/or substitute securities, if any, received by the Grantee in exchange for, or by virtue of his or her ownership of, this Award
or Shares acquired pursuant thereto. 
 (c) Change and Modifications. This Agreement may not be orally changed, modified or
terminated, nor shall any oral waiver of any of its terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Grantee. 

(d) Governing Law. This Agreement shall be governed by and construed in accordance with the General Corporation Law of the State of
Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of California, without regard to conflict of law principles that would result in the application of
any law other than the law of the State of California. 
 (e) Headings. The headings are intended only for convenience in finding the
subject matter and do not constitute part of the text of this Agreement and shall not be considered in the interpretation of this Agreement. 

(f) Saving Clause. If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall
in no manner affect the legality or enforceability of any other provision hereof. 

 (g) Notices. All notices, requests, consents and other communications shall be in writing
and be deemed given when delivered personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the Grantee shall be addressed as set forth
underneath their signatures below, or to such other address or addresses as may have been furnished by such party in writing to the other. 

(h) Benefit and Binding Effect. This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their
respective successors, permitted assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become entitled to all the rights of the Company hereunder to the extent of such assignment. 

(i) Counterparts. For the convenience of the parties and to facilitate execution, this Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 
 (j)
Integration. This Agreement constitutes the entire agreement between the parties with respect to this Award and supersedes all prior agreements and discussions between the parties concerning such subject matter. 

9. Dispute Resolution. 

(a) Except as provided below, any dispute arising out of or relating to the Plan or this Award, this Agreement, or the breach, termination or
validity of the Plan, this Award or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the “J.A.M.S. Rules”).
The arbitration shall be governed by the United States Arbitration Act, 9 U.S.C. Sections 1 16, and judgment upon the award rendered by the arbitrators may be entered by any court having jurisdiction thereof. The place of arbitration shall be San
Francisco, California. 
 (b) The arbitration shall commence within 60 days of the date on which a written demand for arbitration is filed
by any party hereto. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party witnesses. In addition, each party may take up to three depositions as of
right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not have the power to order the answering of interrogatories or the response to requests for
admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven business days before the date of the arbitration, the identity of all persons that may testify at the arbitration and a copy
of all documents that may be introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and award shall be made and delivered within six months of the selection of the arbitrator. The
arbitrator’s decision shall set forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of actual compensatory damages and shall not multiply actual damages or
award punitive damages, and each party hereby irrevocably waives any claim to such damages. 

 (c) The Company, the Grantee, each party to the Agreement and any other holder of Shares issued
pursuant to this Agreement (each, a “Party”) covenants and agrees that such party will participate in the arbitration in good faith. This Section 9 applies equally to requests for temporary, preliminary or permanent injunctive relief,
except that in the case of temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding immediate and irreparable harm. 

(d) Each Party (i) hereby irrevocably submits to the jurisdiction of any United States District Court of competent jurisdiction for the
purpose of enforcing the award or decision in any such proceeding, (ii) hereby waives, and agrees not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject personally
to the jurisdiction of the above named courts, that its property is exempt or immune from attachment or execution (except as protected by applicable law), that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the
suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court, and (iii) hereby waives and agrees not to seek any review by any court of any other jurisdiction which may be
called upon to grant an enforcement of the judgment of any such court. Each Party hereby consents to service of process by registered mail at the address to which notices are to be given. Each Party agrees that its, his or her submission to
jurisdiction and its, his or her consent to service of process by mail is made for the express benefit of each other Party. Final judgment against any Party in any such action, suit or proceeding may be enforced in other jurisdictions by suit,
action or proceeding on the judgment, or in any other manner provided by or pursuant to the laws of such other jurisdiction. 
 10.
Acknowledgements of the Grantee. 
 (a) The Grantee represents and agrees that the Shares to be acquired upon settlement of this
Award will be acquired for investment, and not with a view to the sale or distribution thereof. 
 (b) In the event that the sale or
issuance of Shares under the Plan is not registered under the Securities Act but an exemption is available that requires an investment representation or other representation, the Grantee shall represent and agree at the time of settlement of this
Award resulting in the transfer of Shares that the Shares being acquired are being acquired for investment, and not with a view to the sale or distribution thereof, and shall make such other representations as are deemed necessary or appropriate by
the Company and its counsel. 
 (c) Neither the Company nor any Subsidiary or Affiliate is obligated by or as a result of the Plan or this
Agreement to continue the Grantee’s Service Relationship, and neither the Plan nor this Agreement shall interfere in any way with the right of the Company or any Subsidiary or Affiliate to terminate the Service Relationship of the Grantee at
any time. 
 (d) The Granteee understands that the Shares may not be registered under the Securities Act (it being understood that the
Shares are being issued and sold in reliance on the exemption provided in Rule 701 thereunder) or any applicable state securities or “blue sky” laws and may not be sold or otherwise transferred or disposed of in the absence of an effective
registration statement under the Securities Act and under any applicable state securities or “blue sky” laws (or exemptions from the registration requirement thereof). 

 (e) The Grantee understands and agrees that he or she may not sell or otherwise transfer or
dispose of the Shares for a period of time following the effective date of a public offering by the Company as described in Section 9(f) of the Plan. 

11. Nature of Grant. In accepting the Award, the Grantee acknowledges, understands and agrees that: 

(a) the Plan is established voluntarily by the Company, it is discretionary in nature and it may be modified, amended, suspended or terminated
by the Company at any time, to the extent permitted by the Plan; 
 (b) the grant of the Restricted Stock Units is voluntary and occasional
and does not create any contractual or other right to receive future grants of restricted stock units, or benefits in lieu of restricted stock units, even if restricted stock units have been granted in the past; 

(c) all decisions with respect to future Restricted Stock Units or other grants, if any, will be at the sole discretion of the Company; 

(d) the Grantee is voluntarily participating in the Plan; 

(e) the Restricted Stock Units and the Shares subject to the Restricted Stock Units are not intended to replace any pension rights or
compensation; 
 (f) the Restricted Stock Units and the Shares subject to the Restricted Stock Units, and the income and value of same, are
not part of normal or expected compensation for any purposes, including calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses, long-service awards, pension or retirement or welfare benefits or
similar payments; 
 (g) the future value of the underlying Shares is unknown, indeterminable and cannot be predicted with certainty; 

(h) no claim or entitlement to compensation or damages shall arise from forfeiture of the Award resulting from the termination of the
Grantee’s Service Relationship (for any reason whatsoever whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Grantee is employed or the terms of the Grantee’s employment agreement, if
any), and in consideration of the grant of the Restricted Stock Units to which the Grantee is otherwise not entitled, the Grantee irrevocably agrees never to institute any claim against the Company, any Subsidiary or Affiliate, waives his or
her ability, if any, to bring any such claim, and releases the Company, its Subsidiaries and Affiliates from any such claim; if, notwithstanding the foregoing, any such claim is allowed by a court of competent jurisdiction, then, by participating in
the Plan, the Grantee shall be deemed irrevocably to have agreed not to pursue such claim and agrees to execute any and all documents necessary to request dismissal or withdrawal of such claim; 

(i) unless otherwise provided in the Plan or by the Company in its discretion, the Award and the benefits evidenced by this Agreement do not
create any entitlement to have the Restricted Stock Units or any such benefits transferred to, or assumed by, another company 

 
nor be exchanged, cashed out or substituted for, in connection with any corporate transaction affecting the Series B Common Stock; and 

(j) neither the Company, nor any Subsidiary or Affiliate shall be liable for any foreign exchange rate fluctuation between the Grantee’s
local currency and the United States Dollar that may affect the value of the Restricted Stock Units or of any amounts due to the Grantee pursuant to the settlement of the Restricted Stock Units or the subsequent sale of any Shares acquired upon
settlement. 
 12. No Advice Regarding Grant. The Company is not providing any tax, legal or financial advice, nor is the Company
making any recommendations regarding the Grantee’s participation in the Plan, or the Grantee’s acquisition or sale of the underlying Shares. The Grantee is hereby advised to consult with his or her own personal tax, legal and financial
advisors regarding his or her participation in the Plan before taking any action related to the Plan. 
 13. Data
Privacy. The Grantee hereby explicitly and unambiguously consents to the collection, use and transfer, in electronic or other form, of the Grantee’s personal data as described in this Agreement and any other Award grant materials
(“Data”) by and among, as applicable, the Company and its Subsidiaries and Affiliates for the exclusive purpose of implementing, administering and managing the Grantee’s participation in the Plan. 

The Grantee understands that the Company and the Employer may hold certain personal information about the Grantee, including, but not
limited to, the Grantee’s name, home address and telephone number, date of birth, social insurance number or other identification number, salary, nationality, job title, any shares of stock or directorships held in the Company, details of all
Restricted Stock Units or any other entitlement to shares of Series B Common Stock awarded, canceled, exercised, vested, unvested or outstanding in the Grantee’s favor, for the exclusive purpose of implementing, administering and managing the
Plan. 
 The Grantee understands that Data will be transferred to a third party stock plan service provider as may be selected
by the Company, which is assisting the Company with the implementation, administration and management of the Plan. The Grantee understands that recipients of the Data may be located in the United States or elsewhere, and that the recipients’
country (e.g., the United States) may have different data privacy laws and protections than the Grantee’s country. The Grantee understands that he or she may request a list with the names and addresses of any potential recipients of the Data by
contacting his or her local human resources representative. The Grantee authorizes the Company, the chosen stock plan service provider and any other possible recipients which may assist the Company (presently or in the future) with implementing,
administering and managing the Plan to receive, possess, use, retain and transfer the Data, in electronic or other form, for the sole purpose of implementing, administering and managing his or her participation in the Plan. The Grantee understands
that Data will be held only as long as is necessary to implement, administer and manage the Grantee’s participation in the Plan. The Grantee understands he or she may, at any time, view Data, request additional information about the storage and
processing of Data, require any necessary amendments to Data or refuse or withdraw the consents herein, in any case without cost, by contacting in writing his or her local human resources representative. Further, the Grantee understands that he or
she is providing the consents herein on a purely voluntary 

 
basis. If the Grantee does not consent, or if the Grantee later seeks to revoke his or her consent, his or her Service Relationship and career with the Employer will not be adversely affected;
the only adverse consequence of refusing or withdrawing the Grantee’s consent is that the Company would not be able to grant the Grantee Restricted Stock Units or other equity awards or administer or maintain such awards. Therefore, the Grantee
understands that refusing or withdrawing his or her consent may affect the Grantee’s ability to participate in the Plan. For more information on the consequences of the Grantee’s refusal to consent or withdrawal of consent, the Grantee
understands that he or she may contact his or her local human resources representative. 
 14. Language. If the Grantee has
received this Agreement or any other document related to the Plan translated into a language other than English and if the meaning of the translated version is different than the English version, the English version will control. 

15. Electronic Delivery and Acceptance. The Company may, in its sole discretion, decide to deliver any documents related to current or
future participation in the Plan by electronic means. Participant hereby consents to receive such documents by electronic delivery and agrees to participate in the Plan through an on-line or electronic system established and maintained by the
Company or a third party designated by the Company. 
 16. Waiver. The Grantee acknowledges that a waiver by the Company of breach of
any provision of this Agreement shall not operate or be construed as a waiver of any other provision of this Agreement, or of any subsequent breach by the Grantee or any other Award recipient. 

17. Securities Law Information. The grant of the Restricted Stock Units is being made pursuant to the “Qualifying Person”
exemption under section 273(1)(f) of the Securities and Futures Act (Chapter 289, 2006 Ed.) (“SFA”) and is not made with a view to the Restricted Stock Units being subsequently offered for sale to any other party. The Plan has not
been lodged or registered as a prospectus with the Monetary Authority of Singapore. The Grantee should note that the Restricted Stock Units are subject to section 257 of the SFA and the Grantee will not be able to make (i) any subsequent sale
of Shares in Singapore or (ii) any offer of such subsequent sale of Shares subject to the Restricted Stock Units in Singapore, unless such sale or offer in is made pursuant to the exemptions under Part XIII Division (1) Subdivision
(4) (other than section 280) of the SFA (Chapter 289, 2006 Ed.). 
 18. Insider Trading Restrictions/Market Abuse Laws. The
Grantee acknowledges that he or she may be subject to insider trading restrictions and/or market abuse laws, which may affect his or her ability to acquire or sell Shares or rights to Shares (e.g., Restricted Stock Units) under the Plan
during such times as the Grantee is considered to have “inside information” regarding the Company, as defined by the laws in Singapore. Any restrictions under these laws or regulations are separate from and in addition to any
restrictions that may be imposed under any applicable Company insider trading policy. The Grantee is responsible for ensuring compliance with any applicable restrictions and should speak with his or her personal legal advisor on this matter.

 19. Director Notification Requirement. Directors, associate directors and shadow directors of a Singapore Subsidiary or Affiliate
are subject to certain notification requirements 

 
under the Singapore Companies Act. Directors, associate directors and shadow directors must notify the Singapore Subsidiary Affiliate in writing of an interest (e.g., Restriction Stock
Units, Shares, etc.) in the Company or any related company within two business days of (i) its acquisition or disposal, (ii) any change in a previously disclosed interest (e.g., when the Shares are sold), or (iii) becoming a
director, associate director or shadow director. 
 [SIGNATURE PAGE FOLLOWS] 

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to
by the undersigned as of the date first above written. 
  

			
	ZENDESK, INC., San Francisco, CA
		
	By:	 	  

		 	Alan Black, CFO

 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, including, without limitation,
Section 9 thereof, and understands that the Award granted hereby is subject to the terms of the Plan and of this Agreement. 
 The undersigned also
hereby acknowledges and agrees that the Shares are subject to transfer restrictions as set forth in Section 5 of the Agreement. 
 This Agreement is
hereby accepted, and the terms and conditions thereof and of the Plan, SPECIFICALLY INCLUDING THE ARBITRATION PROVISIONS IN SECTION 9 OF THIS AGREEMENT, are hereby agreed to, by the undersigned as of the date first above written. 

 

			
	GRANTEE (Sign)	 	  

 
			
		
	Printed name:	 	  

 
			
		
	Address:	 	  

	
	  

 APPENDIX A 

ZENDESK, INC. 2009 STOCK OPTION AND GRANT PLAN 

 APPENDIX B 

RESTRICTED STOCK UNIT GRANT NOTICE 
  

					
	Name of Grantee:	  	  
	  	
			
	No. of Restricted Stock Units	  	  
	  	
			
	Grant Date:	  	  
	  	
			
	Expiration Date:	  	  
	  	[seventh anniversary of Grant Date]
			
	Vesting Commencement Date:	  	  
	  	

 Time-Based Vesting Schedule: 

Subject to the determination of the Committee in its sole discretion to accelerate the vesting schedule hereunder: 

[25 percent] of the Restricted Stock Units shall satisfy the Time Condition on the first anniversary of the Vesting Commencement Date (the
“Initial Time Vesting Date”) provided that the Grantee continues to have a Service Relationship with the Company or the Employer on the Initial Time Vesting Date. 

[2.0833%] of the Restricted Stock Units shall satisfy the Time Condition each month for [36] months beginning on the one-year anniversary of the
Vesting Commencement Date (each date, a “Time Vesting Date”), for so long as the Grantee continues to have a Service Relationship with the Company or the Employer.  

Notwithstanding the foregoing, the Time Condition shall only be satisfied with respect to whole Restricted Stock Units and any rounding down to a
number of whole Restricted Stock Units shall correspondingly increase the number of Restricted Stock Units allocated to the [36th] Time Vesting Date.  

Notwithstanding anything in this Notice or the Agreement to the contrary, in the case of a Sale Event, this Award shall be treated as provided
in Section 3(c) of the Plan; provided that any Restricted Stock Units that have satisfied the Time Condition as of the consummation of such Sale Event shall either be assumed, continued or substituted for in accordance with
Section 3(c)(iii)(A) of the Plan or cancelled in exchange for a cash payment in accordance with Section 3(c)(iii)(C) of the Plan. [In addition, insert any special acceleration rights here.] 

Performance Vesting: As set forth in the Agreement. 

 OPTION AGREEMENT 

UNDER THE UK EMI SUB-PLAN TO THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 

Pursuant to the UK EMI Sub-Plan to the Zendesk, Inc. 2009 Stock Option and Grant Plan (the “Plan”), Zendesk, Inc., a Delaware
corporation (together with any successor thereto, the “Company”), hereby grants to the undersigned optionee (the “Optionee”), who is an Eligible Employee of the Company or any of its Subsidiaries, an option (the “Stock
Option”) to purchase on or prior to the expiration date (as indicated on Exhibit A, the “Expiration Date”), or such earlier date as is specified herein, all or any part of the number of shares of Series B Common Stock, par
value $0.01 per share (“Series B Common Stock”), of the Company indicated on Exhibit A (the “Underlying Shares,” and such shares once issued shall be referred to as the “Option Shares”), at the exercise price per
share indicated on Exhibit A (the “Option Exercise Price”), subject to the terms and conditions set forth in this Option Agreement (this “Agreement”) and in the Plan. This Stock Option is intended to be an Unapproved
Option as defined in Income Tax (Earnings and Pensions) Act 2003 (“ITEPA”). 
 All capitalized terms used herein and not otherwise
defined shall have the respective meanings set forth in the Plan. 
 1. Vesting, Exercisability and Termination. 

(a) This Stock Option shall be immediately exercisable, regardless of whether the Underlying Shares are vested. 

(b) Except as set forth below, and subject to the determination of the Committee in its sole discretion to accelerate the vesting schedule
hereunder, the Underlying Shares shall be vested on the respective dates indicated in Exhibit A. Notwithstanding anything herein to the contrary in the case of a Sale Event, this Stock Option shall be treated as provided in Section 3(c)
of the Plan unless otherwise indicated in Exhibit A. 
 (c) Termination. Except as may otherwise be provided by the Committee,
if the Optionee’s Service Relationship is terminated, the period within which to exercise this Stock Option will be subject to earlier termination as set forth below (and if not exercised within such period, shall thereafter terminate, subject
in each case to Section 3(c) of the Plan): 
 (i) Termination Due to Death or Disability. If the Optionee’s
Service Relationship terminates by reason of such Optionee’s death or disability (as defined in Section 422(c) of the Code), this Stock Option may continue to be exercised, to the extent the Underlying Shares are vested on the date of
termination, by the Optionee or the Optionee’s Personal Representative for a period of 12 months from the date of death or disability or until the Expiration Date, if earlier. 

(ii) Other Termination. If the Optionee’s Service Relationship terminates for any reason other than death or
disability (as defined in Section 422(c) of the Code), and unless otherwise determined by the Committee, this Stock Option may 

 
continue to be exercised, to the extent the Underlying Shares are vested on the date of termination, for a period of 90 days from the date of termination or until the Expiration Date, if earlier
provided however, if the Optionee’s Service Relationship is terminated for Cause, this Stock Option shall terminate immediately upon the date of such termination. 

For purposes hereof, the Committee’s determination of the reason for termination of the Optionee’s Service Relationship shall be
conclusive and binding on the Optionee and his or her Personal Representative. Any portion of this Stock Option with respect to Underlying Shares that are not vested on the date of termination of the Service Relationship shall terminate immediately
and be null and void. 
 2. Exercise of Stock Option. 

(a) The Optionee may exercise this Stock Option only in the following manner: Prior to the Expiration Date, the Optionee may deliver a Stock
Option exercise notice (an “Exercise Notice”) in the form of Appendix A hereto indicating his or her election to purchase some or all of the Underlying Shares with respect to which this Stock Option is exercisable at the time of
such notice (together with a signed Section 431 Election, in the form of Appendix B, and a signed Joint Election). Such notice shall specify the number of Underlying Shares to be purchased. To the extent this Stock Option is only
partially exercised, such exercise shall first be with respect to the Underlying Shares, if any, that have previously vested, and then with respect to the Underlying Shares that will next vest, with the Underlying Shares that vest at the latest date
being exercised last. Payment of the purchase price (together with any Option Tax Liability and Secondary NIC Liability) may be made by one or more of the methods described in Sections 5(a)(iv)(A), (B), (C) or (D) of the Plan, subject to
the limitations contained in such Sections of the Plan. 
 (b) In the event the Optionee exercises a portion of this Stock Option with
respect to Underlying Shares that have not vested, the Optionee shall also deliver a Restricted Stock Agreement in a form provided by the Company covering such unvested Underlying Shares (the “Restricted Stock Agreement”) with the same
vesting schedule for such Underlying Shares as set forth for the Underlying Shares herein. The Restricted Stock Agreement shall be deemed a Restricted Stock Award and all Underlying Shares so acquired pursuant to such Restricted Stock Agreement
shall be deemed Restricted Stock for all purposes under the Plan. 
 (c) Notwithstanding any other provision hereof or of the Plan, no
portion of this Stock Option shall be exercisable after the Expiration Date. 
 3. Incorporation of Plan. Notwithstanding anything
herein to the contrary, this Stock Option shall be subject to and governed by all the terms and conditions of the Plan. 
 4.
Transferability of Stock Option. This Agreement is personal to the Optionee and is not transferable by the Optionee in any manner other than to Optionee’s Personal Representative on Optionee’s death. The Stock Option may be
exercised during the Optionee’s lifetime only by the Optionee. 
 5. Restrictions on Transfer of Underlying Shares. The
Underlying Shares may not be sold, transferred or otherwise disposed of without the advance express written consent of the 

  
 2 

 
Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that the Optionee may transfer the Underlying Shares without such consent to a
Permitted Transferee or upon the death of the Optionee, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan and (ii) following an Initial Public Offering. In addition, the Underlying Shares shall be
subject to certain additional transfer restrictions and other limitations including, without limitation, the provisions contained in Section 9 of the Plan and, if applicable, the Restricted Stock Agreement. 

6. Repurchase Right. Upon a Termination Event, the Company shall have the right to repurchase any Underlying Shares deemed Restricted
Stock as of the date of such Termination Event as set forth in Section 9(c) of the Plan. 
 7. Miscellaneous Provisions. 

(a) Equitable Relief. The parties hereto agree and declare that legal remedies may be inadequate to enforce the provisions of this
Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(b) Adjustments for Changes in Capital Structure. If, as a result of any reorganization, recapitalization, reincorporation,
reclassification, stock dividend, stock split, reverse stock split or other similar change in the Series B Common Stock, the outstanding shares of Series B Common Stock are increased or decreased or are exchanged for a different number or
kind of securities of the Company, the restrictions contained in this Agreement shall apply with equal force to additional and/or substitute securities, if any, received by the Optionee in exchange for, or by virtue of his or her ownership of, this
Stock Option or the Underlying Shares. 
 (c) Change and Modifications. This Agreement may not be orally changed, modified or
terminated, nor shall any oral waiver of any of its terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Optionee. 

(d) Governing Law. This Agreement shall be governed by and construed in accordance with the General Corporation Law of the State of
Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of California, without regard to conflict of law principles that would result in the application of
any law other than the law of the State of California. The Section 431 Election and Joint Election shall be governed by the laws of England and Wales. 

(e) Headings. The headings are intended only for convenience in finding the subject matter and do not constitute part of the text of
this Agreement and shall not be considered in the interpretation of this Agreement. 
 (f) Saving Clause. If any provision(s) of this
Agreement shall be determined to be illegal or unenforceable, such determination shall in no manner affect the legality or enforceability of any other provision hereof. 

  
 3 

 (g) Notices. All notices, requests, consents and other communications shall be in writing
and be deemed given when delivered personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the Optionee shall be addressed as set forth
underneath their signatures below, or to such other address or addresses as may have been furnished by such party in writing to the other. 

(h) Benefit and Binding Effect. This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their
respective successors, permitted assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become entitled to all the rights of the Company hereunder to the extent of such assignment. 

(i) Counterparts. For the convenience of the parties and to facilitate execution, this Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 
 (j)
Integration. This Agreement constitutes the entire agreement between the parties with respect to this Stock Option and supersedes all prior agreements and discussions between the parties concerning such subject matter. 

8. Dispute Resolution. 

(a) Except as provided below, any dispute arising out of or relating to the Plan or this Stock Option, this Agreement, or the breach,
termination or validity of the Plan, this Stock Option or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the
“J.A.M.S. Rules”). The arbitration shall be governed by the United States Arbitration Act, 9 U.S.C. Sections 1-16, and judgment upon the award rendered by the arbitrators may be entered by any court
having jurisdiction thereof. The place of arbitration shall be San Francisco, California. 
 (b) The arbitration shall commence within 60
days of the date on which a written demand for arbitration is filed by any party hereto. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party
witnesses. In addition, each party may take up to three depositions as of right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not have the power
to order the answering of interrogatories or the response to requests for admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven business days before the date of the arbitration,
the identity of all persons that may testify at the arbitration and a copy of all documents that may be introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and award shall be made
and delivered within six months of the selection of the arbitrator. The arbitrator’s decision shall set forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of
actual compensatory damages and shall not multiply actual damages or award punitive damages, and each party hereby irrevocably waives any claim to such damages. 

  
 4 

 (c) The Company, the Optionee, each party to the Agreement and any other holder of Underlying
Shares issued pursuant to this Agreement (each, a “Party”) covenants and agrees that such party will participate in the arbitration in good faith. This Section 7 applies equally to requests for temporary, preliminary or permanent
injunctive relief, except that in the case of temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding immediate and irreparable harm. 

(d) Each Party (i) hereby irrevocably submits to the jurisdiction of any United States District Court of competent jurisdiction for the
purpose of enforcing the award or decision in any such proceeding, (ii) hereby waives, and agrees not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject personally
to the jurisdiction of the above-named courts, that its property is exempt or immune from attachment or execution (except as protected by applicable law), that the suit, action or proceeding is brought in an
inconvenient forum, that the venue of the suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court, and (iii) hereby waives and agrees not to seek any review by any court
of any other jurisdiction which may be called upon to grant an enforcement of the judgment of any such court. Each Party hereby consents to service of process by registered mail at the address to which notices are to be given. Each Party agrees that
its, his or her submission to jurisdiction and its, his or her consent to service of process by mail is made for the express benefit of each other Party. Final judgment against any Party in any such action, suit or proceeding may be enforced in
other jurisdictions by suit, action or proceeding on the judgment, or in any other manner provided by or pursuant to the laws of such other jurisdiction. 

9. Tax Obligations. 
 (a)
Withholding. In the event that the Company determines that it is required to account to HM Revenue & Customs for the Option Tax Liability and any Secondary NIC Liability or to withhold any other tax as a result of the exercise of
this Option, the Optionee, as a condition to the exercise of the Option, shall make arrangements satisfactory to the Company to enable it to satisfy all withholding liabilities. The Optionee shall also make arrangements satisfactory to the Company
to enable it to satisfy any withholding requirements that may arise in connection with the vesting or disposition of Underlying Shares purchased by exercising this Option. 

(b) Tax Consultation. Optionee understands that he or she may suffer adverse tax consequences as a result of Optionee’s purchase
or disposition of the Underlying Shares. Optionee represents that he or she will consult with any tax advisors Optionee deems appropriate in connection with the purchase or disposition of the Underlying Shares and that Optionee is not relying on the
Company for any tax advice. 
 (c) Section 431 Election. As a further condition of the exercise of this Option, the Optionee
shall have signed a Section 431 Election in the form set out in Appendix B or in such other form as may be determined by HM Revenue & Customs from time to time. 

  
 5 

 (d) Employer’s National Insurance Charges. As a further condition of the exercise of
an Option under the Plan the Optionee shall join with the Company and employing company, or if and to the extent that there is a change in the law, any other company or person who is or becomes a secondary contributor in making a Joint Election
which has been approved by HM Revenue & Customs, for the transfer of the whole any Secondary NIC Liability. 
 (e)
Optionee’s Tax Indemnity. 
 (i) Indemnity. To the extent permitted by law, the Optionee hereby agrees to
indemnify and keep indemnified the Company, and the Company as trustee for and on behalf of any related corporation, for any Option Tax Liability. 

(ii) No Obligation to Issue Underlying Shares. The Company shall not be obliged to allot and issue any Underlying Shares
or any interest in Underlying Shares pursuant to the exercise of this Option unless and until the Optionee has paid to the Company such sum as is, in the opinion of the Company, sufficient to indemnify the Company in full against the Option Tax
Liability and the Secondary NIC Liability, or the Optionee has made such other arrangement as in the opinion of the Company will ensure that the full amount of any Option Tax Liability and any Secondary NIC Liability will be recovered from the
Optionee within such period as the Company may then determine. 
 (iii) Right of Retention. In the absence of any such
other arrangement being made, the Company shall have the right to retain out of the aggregate number of shares to which the Optionee would have otherwise been entitled upon the exercise of this Option, such number of Underlying Shares as, in the
opinion of the Company, will enable the Company to sell as agent for the Optionee (at the best price which can reasonably expect to be obtained at the time of the sale) and to pay over to the Company sufficient monies out of the net proceeds of
sale, after deduction of all fees, commissions and expenses incurred in relation to such sale, to satisfy the Optionee’s liability under such indemnity. 

10. Data Protection. 

(a) By entering into this Option Agreement, and as a condition of the grant of the Option, Optionee consents to the collection, use, and
transfer of personal data as described in this paragraph to the full extent permitted by and in full compliance with applicable laws. 
 (b)
Optionee understands that the Company and its Subsidiaries hold Data about the Optionee for the purpose of managing and administering the Plan. 

(c) Optionee further understands that the Company and/or its Subsidiaries will transfer Data among themselves as necessary for the purposes of
implementation, administration, and management of Optionee’s participation in the Plan, and that the Company and/or its Subsidiary may each further transfer Data to any Data Recipients. 

(d) Optionee understands that these Data Recipients may be located in Optionee’s country of residence or elsewhere, such as the United
States. Optionee authorises the Data Recipients to receive, possess, use, retain, and transfer Data in electronic or other form, for 

  
 6 

 
the purposes of implementing, administering, and managing Optionee’s participation in the Plan, including any transfer of such Data, as may be required for the administration of the Plan
and/or the subsequent holding of Underlying Shares on Optionee’s behalf, to a broker or third party with whom the Underlying Shares acquired on exercise may be deposited. Where the transfer is to be to a destination outside the European
Economic Area, the Company shall take reasonable steps to ensure that the Optionee’s personal data continues to be adequately protected and securely held. 

(e) Optionee understands that Optionee may, at any time, review the Data, request that any necessary amendments be made to it, or withdraw
Optionee’s consent herein in writing by contacting the Company. Optionee further understands that withdrawing consent may affect Optionee’s ability to participate in the Plan. 

11. Additional Terms. 

(a) Optionee has no right to compensation or damages for any loss in respect of the Option where such loss arises (or is claimed to arise), in
whole or in part, from the termination of Optionee’s employment; or notice to terminate employment given by or to Optionee. This exclusion of liability shall apply however termination of employment, or the giving of notice, is caused other than
in a case where a competent tribunal or court, from which there can be no appeal (or which the relevant employing company has decided not to appeal), has found that the cessation of the Optionee’s employment amounted to unfair or constructive
dismissal of Optionee and however compensation or damages may be claimed. 
 (b) Optionee has no right to compensation or damages for any
loss in respect of an Option where such loss arises (or is claimed to arise), in whole or in part, from any company ceasing to be a Subsidiary of the Company; or the transfer of any business from a Subsidiary of the Company to any person which is
not a Subsidiary of the Company. This exclusion of liability shall apply however the change of status of the relevant company, or the transfer of the relevant business, is caused, and however compensation or damages may be claimed. 

[SIGNATURE PAGE FOLLOWS] 

  
 7 

 This Agreement has been executed and delivered as a deed on the date set out below. 

Dated:
                                        

  

			
	SIGNED as a DEED	 	
	BY ZENDESK, INC.	 	)
	acting by the under-mentioned	 	)
	person(s) acting on the authority of	 	)
	the Company in accordance with the	 	)
	laws of the territory of its incorporation:	 	)

 Authorised
signatory                                       
                                         
Chief Financial Officer 
 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, including, without limitation, Section 9
thereof, and understands that the Stock Option granted hereby is subject to the terms of the Plan and of this Agreement. This Agreement is hereby accepted, and the terms and conditions thereof and of the Plan, SPECIFICALLY INCLUDING THE ARBITRATION
PROVISIONS IN SECTION 7 OF THIS AGREEMENT, are hereby agreed to. by the undersigned as of the date first above written. This Agreement has been executed and delivered as a deed on the date set out above. 

The undersigned also hereby acknowledges and agrees that the Underlying Shares are subject to transfer restrictions as set forth in Section 5 of the
Agreement. 
  

			
	SIGNED as a DEED             )
	By the under-mentioned Optionee)
	in the presence of:
		
	Witness signature:	 	  

			
		
	Name:	 	  

			
		
	Address:	 	  

	
	  

  
 8 

 Appendix A 

STOCK OPTION EXERCISE NOTICE 

(to be prepared only to exercise Stock Options) 
  

	
	Zendesk, Inc.
	Attention: [                                   
                               ]
	  

	  

 Pursuant to the terms of my stock option agreement(s) between the undersigned and Zendesk, Inc. (the
“Company”) under the UK EMI Sub-Plan to the Zendesk, Inc. 2009 Stock Option and Grant Plan, I, hereby partially/fully exercise such option by including herein payment in the amount of
$             representing the purchase price (and any Option Tax Liability and Secondary NIC Liability) representing the purchase price for the Underlying Shares. 

Name of Optionee:
                                         
                        
  

									
	 Grant Date
	  	Full or
partial
exercise	  	Number of
Options
Exercised	  	Price
per
share	  	Total Exercise
Price
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	

 I also include a signed Section 431 Election and Joint Election. I have chosen the following form(s) of
payment: 
  

					
	[    ]	 	1.	 	Cash
			
	[    ]	 	2.	 	Certified or bank cheque payable to Zendesk, Inc.
			
	[    ]	 	3.	 	Other (as referenced in the Agreement and described in the Plan (please describe))
                                         
                                         
                                         
             .

 In connection with my exercise of the option as set forth above, I hereby represent and warrant to the
Company as follows: 
 (i) I am purchasing the Underlying Shares for my own account for investment only, and not for resale
or with a view to the distribution thereof. 

 (ii) I have had such an opportunity as I have deemed adequate to obtain from the
Company such information as is necessary to permit me to evaluate the merits and risks of my investment in the Company and have consulted with my own advisers with respect to my investment in the Company. 

(iii) I have sufficient experience in business, financial and investment matters to be able to evaluate the risks involved in
the purchase of the Underlying Shares and to make an informed investment decision with respect to such purchase. 
 (iv) I
can afford a complete loss of the value of the Underlying Shares and am able to bear the economic risk of holding such Underlying Shares for an indefinite period of time. 

(v) I understand that the shares of Series B Common Stock that I acquire upon exercise of the Options (using Exhibit B) as
well as any shares of Series A Common Stock and Series B Common Stock that I have previously purchased, been granted, or that are subject to other awards made to you under the Plan, may not be sold, transferred or otherwise disposed of without the
advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that I may transfer any such shares without such consent (i) to a Permitted Transferee
(as defined in the Plan) or upon my death, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan, and (ii) subject to the other restrictions on transfer set forth in the Plan, upon an Initial Public
Offering I understand that the Underlying Shares may not be registered under the Securities Act of 1933 (it being understood that the Underlying Shares are being issued and sold in reliance on the exemption provided in Rule 701 or another applicable
exemption thereunder) or any applicable state securities or “blue sky” laws and may not be sold or otherwise transferred or disposed of in the absence of an effective registration statement under the Securities Act of 1933 and under any
applicable state securities or “blue sky” laws (or exemptions from the registration requirement thereof). I further acknowledge that certificates representing Underlying Shares will bear restrictive legends reflecting the foregoing and/or
that book entries for uncertificated Underlying Shares will include similar restrictive notations. 
  

	
	Sincerely yours,
	
	  

	Name:
	
	Address:
	
	  

	
	  

	
	  

 Appendix B – Section 431 Election 

Joint Election under s431 ITEPA 2003 for full or partial disapplication 

of Chapter 2 Income Tax (Earnings and Pensions) Act 2003 

One Part Election 
  

	 	1.	Between 

  

							
	the Employee	 		 	name	 	  

			
	whose National Insurance Number is	 		 	  

				
	and	 		 		 	
			
	 the Company (who is the Employee’s employer)
  

of Company Registration Number
	 		 	 Zendesk UK Limited
  

07622459

  

	 	2.	Purpose of Election 

 This joint election is made pursuant to section 431(1) or 431(2) Income Tax
(Earnings and Pensions) Act 2003 (ITEPA) and applies where employment-related securities, which are restricted securities by reason of section 423 ITEPA, are acquired. 

The effect of an election under section 431(1) is that, for the relevant Income Tax and NIC purposes, the employment-related securities and their market value
will be treated as if they were not restricted securities and that sections 425 to 430 ITEPA do not apply. An election under section 431(2) will ignore one or more of the restrictions in computing the charge on acquisition. Additional Income Tax
will be payable (with PAYE and NIC where the securities are Readily Convertible Assets). 

 

Should the value of the securities fall following the acquisition, it is possible that Income Tax/NIC that
would have arisen because of any future chargeable event (in the absence of an election) would have been less than the Income Tax/NIC due by reason of this election. Should this be the case, there is no Income Tax/NIC relief available under Part 7
of ITEPA 2003; nor is it available if the securities acquired are subsequently transferred, forfeited or revert to the original owner. 

	 	3.	Application 

 This joint election is made not later than 14 days after the date of acquisition of the
securities by the employee and applies to: 
                  shares of
Series B Common Stock of Zendesk, Inc. 
 To be acquired by the Employee after
                    [d /m /y] under the terms of the UK EMI Sub-Plan to the Zendesk, Inc 2009 Stock Option and Stock Grant Plan. 

 

	 	4.	Extent of Application 

 This election disapplies: 

S.431(1) ITEPA: All restrictions attaching to the securities. 
  

	 	5.	Declaration 

 This election will become irrevocable upon the later of its signing or the acquisition (*
and each subsequent acquisition) of employment-related securities to which this election applies. 
 (* delete as appropriate) 

In signing this joint election, we agree to be bound by its terms as stated above. 
  

							
	  
	 		 	
            /    /    
    
	 	
	Zendesk UK Ltd General Manager / Director	 		 	Date	 	
				
	  
	 		 	
            /    /    
    
	 	
	Signature (Employee)	 		 	Date	 	

 Note: Where the election is in respect of multiple acquisitions, prior to the date of any subsequent acquisition of a security
it may be revoked by agreement between the employee and employer in respect of that and any later acquisition. 

 Exhibit A 

Option Grant 
 Under the
UK EMI Sub-Plan to the Zendesk, Inc. 
 2009 Stock Option and Grant Plan 

 

							
	Name of Optionee:	 	  
	  	
		
	Underlying Shares:	 	                         Shares of Series B Common Stock

 Date Granted by Parent Board of Directors:
                                       

Expiration Date:
                                       

 

							
	Vesting Begins on	 	  
	  	(Vesting Commencement Date)
				
	Option Exercise Price/Share:	 	$	  	  
	  	

 Vesting Schedule: Subject to the determination of the Committee in its sole discretion to accelerate the vesting
schedule hereunder, this Stock Option shall be vested with respect to the Underlying Shares on the respective dates indicated below: 
 (i) 25% of the
Underlying Shares shall vest on the first anniversary of the Vesting Commencement Date; and 
 (ii) 2.0833% of the Underlying Shares shall vest each
completed month for 36 months following the first anniversary of the Vesting Commencement Date, 
 so long as the Optionee maintains a Service Relationship
on each such date. 
 [; provided, however INSERT ANY ACCELERATED VESTING PROVISION HERE]. 

 Exhibit B 

Zendesk, Inc. 2009 Stock Option and Grant Plan 

[ATTACH] 

 Exhibit C 

UK EMI Sub-Plan to the Zendesk, Inc. 

2009 Stock Option and Grant Plan 

[ATTACH] 

 Restricted Stock Agreement for Early Exercise of Unapproved Option Under the UK EMI 

Sub Plan to the 
 Zendesk,
Inc. 2009 Stock Option and Grant Plan 
  

			
	Optionee Name	 	 
	Date of Original Grant	 	 
	Date of Early Exercise Notice	 	 
	Number of Restricted Shares purchased herein	 	 
	Price paid per share	 	 
	Aggregate purchase price	 	 

 All capitalized terms used in this Restricted Stock Agreement for Early Exercise Option (“Agreement”) and not
otherwise defined shall have the respective meanings set forth in the Stock Option Agreement (including the Appendices thereto) (the “Option Agreement”) between Zendesk, Inc. (the “Company”) and the undersigned Optionee granting
Optionee Stock Options to purchase shares of Series B Common Stock under the UK EMI Sub Plan to the Zendesk, Inc. 2009 Stock Option and Grant Plan (the “Plan”). This Agreement shall be considered a Restricted Stock Award for all purposes
under the Plan. 
 Upon signing this Agreement and delivering the Stock Option Exercise Notice (“Exercise Notice”) to the Company,
Company shall deliver to Optionee, the Underlying Shares to be acquired upon exercise, subject to the following terms: 
 1. Purchase and Sale of
Underlying Shares; Vesting. 
 (a) Purchase and Sale. The Company hereby sells to the Optionee, and the Optionee is purchasing
from the Company, the number of Underlying Shares set forth in the Exercise Notice, pursuant to the Option Agreement, for the aggregate Option Exercise Price for the Underlying Shares so purchased. 

(b) Vesting. The risk of forfeiture shall lapse with respect to the Underlying Shares, and such Underlying Shares shall become vested,
on the respective dates indicated on the Vesting Schedule set forth in Exhibit A to the Option Agreement. The Underlying Shares shall be considered Shares of Restricted Stock (as defined in the Plan) for purposes of this Agreement and the Plan. 

2. Repurchase Right. Upon a Termination Event or a Repurchase Event, the Company shall have the right to repurchase the Underlying Shares deemed to be
Restricted Stock as set forth in Section 9(c) of the Plan. 
 3. Restrictions on Transfer of Underlying Shares. The Underlying Shares (whether
or not vested) may not be sold, transferred or otherwise disposed of without the advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that the
Underlying Shares may be transferred 

 
without such consent (i) to a Permitted Transferee or upon death, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan, and (ii) following a
Initial Public Offering. The Underlying Shares (whether or not vested) shall be subject to certain transfer restrictions and other limitations including, without limitation, the provisions contained in Section 9 of the Plan. 

4. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Restricted Stock Agreement shall be subject to and governed by all the
terms and conditions of the Plan. 
 5. Escrow and Stock Assignment. The certificates for any Underlying Shares shall be deposited in escrow with the
Company to be held in escrow with the Company. Each deposited certificate shall be accompanied by a duly executed stock assignment separate from certificate in the form attached hereto as Appendix 1 (the “Assignment”). The deposited
certificates and the Assignment, together with any other assets or securities from time to time deposited with the Company pursuant to this Agreement shall remain in escrow until such time or times as the Underlying Shares are released from the
Company’s right to repurchase the Underlying Shares as set forth in Section 9(c) of the Plan. If the Company (or its assignees) elects to exercise its right to repurchase the Underlying Shares as set forth in Section 9(c) of the Plan
then the escrowed certificates for such Underlying Shares being repurchased (together with any other assets or securities issued with respect thereto) shall be delivered to the Company, concurrently with the payment to the Holder, in cash or cash
equivalent (including the cancellation of any purchase-money indebtedness), of an amount equal to the applicable repurchase price for the Underlying Shares being repurchased, and the Optionee shall cease to have any further rights or claims with
respect to such Underlying Shares (or other assets or securities attributable to such Underlying Shares). 
 6. Miscellaneous Provisions. 

(a) Record Owner; Dividends. The Optionee and any Permitted Transferees, during the duration of this Agreement, shall be considered the
record owners of and shall be entitled to vote the Underlying Shares if and to the extent the Underlying Shares are entitled to voting rights. The Optionee and any Permitted Transferees shall be entitled to receive all dividends and any other
distributions declared on the Underlying Shares; provided, however, that the Company is under no duty to declare any such dividends or to make any such distribution. 

(b) Section 83(b) Election. The Optionee shall consult with the Optionee’s tax advisor to determine whether it would be
appropriate for the Optionee to make an election under Section 83(b) of the Code with respect to the Underlying Shares. Any such election must be filed with the Internal Revenue Service within 30 days of the date of exercise. If the Optionee
makes an election under Section 83(b) of the Code, the Optionee shall give prompt notice to the Company (and provide a copy of such election to the Company). 

(c) Equitable Relief. The parties hereto agree and declare that legal remedies may be inadequate to enforce the provisions of this
Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

 (d) Change and Modifications. This Agreement may not be orally changed, modified or
terminated, nor shall any oral waiver of any of its terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Optionee. 

(e) Governing Law. This Agreement shall be governed by and construed in accordance with the General Corporation Law of the State of
Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of California, without regard to conflict of law principles that would result in the application of
any law other than the law of the State of California. 
 (f) Headings. The headings are intended only for convenience in finding the
subject matter and do not constitute part of the text of this Agreement and shall not be considered in the interpretation of this Agreement. 

(g) Saving Clause. If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall
in no manner affect the legality or enforceability of any other provision hereof. 
 (h) Notices. All notices, requests, consents and
other communications shall be in writing and be deemed given when delivered personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the
Optionee shall be addressed as set forth underneath their signatures below, or to such other address or addresses as may have been furnished by such party in writing to the other. 

(i) Benefit and Binding Effect. This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their
respective successors, assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become entitled to all the rights of the Company hereunder to the extent of such assignment. 

(j) Counterparts. For the convenience of the parties and to facilitate execution, this Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 
 7. Dispute Resolution. 

(a) Except as provided below, any dispute arising out of or relating to the Plan or the Underlying Shares, this Agreement, or the breach,
termination or validity of the Plan, the Underlying Shares or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the
“J.A.M.S. Rules”). The arbitration shall be governed by the United States Arbitration Act, 9 U.S.C. Sections 1 - 16, and judgment upon the award rendered by the arbitrators may be entered by any court having jurisdiction thereof. The place
of arbitration shall be San Francisco, California. 
 (b) The arbitration shall commence within 60 days of the date on which a written
demand for arbitration is filed by any party hereto. In connection with the arbitration 

 
proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party witnesses. In addition, each party may take up to three depositions as of
right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not have the power to order the answering of interrogatories or the response to requests for
admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven business days before the date of the arbitration, the identity of all persons that may testify at the arbitration and a copy
of all documents that may be introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and award shall be made and delivered within six months of the selection of the arbitrator. The
arbitrator’s decision shall set forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of actual compensatory damages and shall not multiply actual damages or
award punitive damages, and each party hereby irrevocably waives any claim to such damages. 
 (c) The Company, the Optionee, each party to
the Agreement and any other holder of Underlying Shares issued pursuant to this Agreement (each, a “Party”) covenants and agrees that such party will participate in the arbitration in good faith. This Section 7 applies equally to
requests for temporary, preliminary or permanent injunctive relief, except that in the case of temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding immediate and
irreparable harm. 
 (d) Each Party (i) hereby irrevocably submits to the jurisdiction of any United States District Court of competent
jurisdiction for the purpose of enforcing the award or decision in any such proceeding, (ii) hereby waives, and agrees not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not
subject personally to the jurisdiction of the above named courts, that its property is exempt or immune from attachment or execution (except as protected by applicable law), that the suit, action or proceeding is brought in an inconvenient forum,
that the venue of the suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court, and (iii) hereby waives and agrees not to seek any review by any court of any other
jurisdiction which may be called upon to grant an enforcement of the judgment of any such court. Each Party hereby consents to service of process by registered mail at the address to which notices are to be given. Each Party agrees that its, his or
her submission to jurisdiction and its, his or her consent to service of process by mail is made for the express benefit of each other Party. Final judgment against any Party in any such action, suit or proceeding may be enforced in other
jurisdictions by suit, action or proceeding on the judgment, or in any other manner provided by or pursuant to the laws of such other jurisdiction. 

[SIGNATURE PAGE FOLLOWS] 

 The foregoing Restricted Stock Agreement is hereby accepted and the terms and conditions thereof
are hereby agreed to by the undersigned as of the date first above written. 
  

			
	ZENDESK, INC.
		
	By:	 	  

		 	Alan Black, Chief Financial Officer

 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, including, without limitation,
Section 9 thereof and understands that the Underlying Shares purchased hereby are subject to the terms of the Plan and this Agreement. This Agreement is hereby accepted, and the terms and conditions of the Plan, the Option Agreement and this
Agreement, SPECIFICALLY INCLUDING THE ARBITRATION PROVISIONS SET FORTH IN SECTION 7 OF THIS AGREEMENT, are hereby agreed to, by the undersigned as of the date first above written. 

 

	
	OPTIONEE:
	
	  

	Name:
	
	Address:
	
	  

	
	  

	
	  

 Appendix 1 to 

Restricted Stock Agreement 

STOCK ASSIGNMENT SEPARATE FROM CERTIFICATE 

FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers unto Zendesk, Inc.
                 shares of Common Stock of the Company standing in the undersigned’s name on the books of the Company represented by Certificate(s) No.
     herewith and hereby irrevocably constitutes and appoints the Secretary and other officers of the Company attorneys to transfer said stock on the books of the Company with full power of substitution in the premises. 

 

			
	Date:	 	  

		
	By:	 	  

 

			
	Print Stockholder Name:	 	  

 INSTRUCTIONS: Stockholder to sign and print name only. All other blanks and date should be left blank. To be completed by
Company upon exercise of repurchase right. 

  
 21 

 RESTRICTED STOCK AGREEMENT 

UNDER THE ZENDESK, INC. 

2009 STOCK OPTION AND GRANT PLAN 

Pursuant to the Zendesk, Inc. 2009 Stock Option and Grant Plan (the “Plan”), Zendesk, Inc., a Delaware corporation (together with
any successor entity, the “Company”), hereby grants, sells and issues to the undersigned individual (the “Grantee”), who is an officer, employee, director, Consultant or other key person of the Company or any of the Subsidiaries,
the number of shares set forth on Exhibit A (the “Shares”) at the per share purchase price set forth on Exhibit A, which represents the fair market value per share on the Grant Date (the “Per Share Purchase Price”),
subject to the terms and conditions set forth herein and in the Plan. The Grantee agrees to the provisions set forth herein and acknowledges that each such provision is a material condition of the Company’s agreement to issue and sell the
Shares to him or her. The Company hereby acknowledges receipt of the amount set forth as the Purchase Price on Exhibit A in full payment for the Shares. All references to share prices and amounts herein shall be equitably adjusted to reflect
stock splits, stock dividends, recapitalizations, mergers, reorganizations and similar changes affecting the capital stock of the Company, and any shares of capital stock of the Company received on or in respect of Shares in connection with any such
event (including any shares of capital stock or any right, option or warrant to receive the same or any security convertible into or exchangeable for any such shares or received upon conversion of any such shares) shall be subject to this Agreement
on the same basis and extent at the relevant time as the Shares in respect of which they were issued, and shall be deemed Shares as if and to the same extent they were issued at the date hereof. 

All capitalized terms used herein and not otherwise defined shall have the respective meanings set forth in the Plan. 

1. Purchase and Sale of Shares; Vesting; Investment Representations. 

(a) Purchase and Sale. On the date hereof, the Company hereby sells to the Grantee, and the Grantee hereby purchases from the Company,
the number of Shares set forth above for the Per Share Purchase Price. 
 (b) Vesting. On the date of this Agreement, all of the
Shares are non-transferable and subject to a substantial risk of forfeiture and are Shares of Restricted Stock. On each of the dates listed on Exhibit A, the risk of forfeiture shall lapse and vest with respect to the respective number of
Shares indicated on Exhibit A if Grantee remains in a Service Relationship with the Company on each such date. 
 (c) Investment
Representations. In connection with the purchase and sale of the Shares contemplated by Section 1(a) above, the Grantee hereby represents and warrants to the Company as follows: 

(i) The Grantee is purchasing the Shares for the Grantee’s own account for investment only, and not for resale or with a
view to the distribution thereof. 

 (ii) The Grantee has had such an opportunity as he or she has deemed adequate to
obtain from the Company such information as is necessary to permit him or her to evaluate the merits and risks of the Grantee’s investment in the Company and has consulted with the Grantee’s own advisers with respect to the Grantee’s
investment in the Company. 
 (iii) The Grantee has sufficient experience in business, financial and investment matters to be
able to evaluate the risks involved in the purchase of the Shares and to make an informed investment decision with respect to such purchase. 

(iv) The Grantee can afford a complete loss of the value of the Shares and is able to bear the economic risk of holding such
Shares for an indefinite period. 
 (v) The Grantee understands that the Grantee may not sell, transfer, or otherwise dispose
of any Shares without the advance express written consent of the Company, unless such transfer constitutes a transfer to a Permitted Transferee or a transfer upon the Grantee’s death, as specifically provided for in Section 9(a)(ii)(A) and
(B) of the Zendesk, Inc. 2009 Stock Option and Grant Plan. 
 (vi) The Grantee understands that the Shares are not
registered under the Act (it being understood that the Shares are being issued and sold in reliance on the exemption provided in Rule 701 thereunder) or any applicable state securities or “blue sky” laws and may not be sold or otherwise
transferred or disposed of in the absence of an effective registration statement under the Act and under any applicable state securities or “blue sky” laws (or exemptions from the registration requirements thereof). The Grantee further
acknowledges that certificates representing the Shares will bear restrictive legends reflecting the foregoing and/or that book entries for uncertificated Shares will include similar restrictive notations. 

(d) Repurchase Right. Upon a Termination Event or other Repurchase Event, the Company shall have the right to repurchase the Shares as
set forth in Section 9(c) of the Plan. 
 2. Restrictions on Transfer of Shares. The Shares (whether or not vested) may not be
sold, transferred or otherwise disposed of without the advance express written consent of the Company, which consent may be given or denied in the Company’s sole and absolute discretion; provided, however, that the Grantee may transfer the
Shares without such consent to a Permitted Transferee or upon the death of the Grantee, in accordance with the terms and conditions of Section 9(a)(ii)(A) and (B) of the Plan. The Shares shall be subject to certain additional transfer
restrictions and other limitations including, without limitation, the provisions contained in Section 9 of the Plan; provided, however, that in the case of a Termination Event, the Company shall only have the right to repurchase
Shares of Restricted Stock which are unvested as of the date of such Termination Event. 
 3. Incorporation of Plan. Notwithstanding
anything herein to the contrary, this Restricted Stock Award shall be subject to and governed by all the terms and conditions of the Plan. 

  
 2 

 4. Miscellaneous Provisions. 

(a) Record Owner; Dividends. The Grantee and any Permitted Transferees, during the duration of this Agreement, shall be considered the
record owners of and shall be entitled to vote the Shares if and to the extent the Shares are entitled to voting rights. The Grantee and any Permitted Transferees shall be entitled to receive all dividends and any other distributions declared on the
Shares; provided, however, that the Company is under no duty to declare any such dividends or to make any such distribution. 

(b) Equitable Relief. The parties hereto agree and declare that legal remedies are inadequate to enforce the provisions of this
Agreement and that equitable relief, including specific performance and injunctive relief, may be used to enforce the provisions of this Agreement. 

(c) Change and Modifications. This Agreement may not be orally changed, modified or terminated, nor shall any oral waiver of any of its
terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and the Grantee. 

(d) Governing Law. This Agreement shall be governed by and construed in accordance with the General Corporation Law of the State of
Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of California, without regard to conflict of law principles that would result in the application of
any law other than the law of the State of California. 
 (e) Headings. The headings are intended only for convenience in finding the
subject matter and do not constitute part of the text of this Agreement and shall not be considered in the interpretation of this Agreement. 

(f) Saving Clause. If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall
in no manner affect the legality or enforceability of any other provision hereof. 
 (g) Notices. All notices, requests, consents and
other communications shall be in writing and be deemed given when delivered personally, by telex or facsimile transmission or when received if mailed by first class registered or certified mail, postage prepaid. Notices to the Company or the Grantee
shall be addressed as set forth underneath their signatures below, or to such other address or addresses as may have been furnished by such party in writing to the other. Notices to any holder of the Shares other than the Grantee shall be addressed
to the address furnished by such holder to the Company. 
 (h) Benefit and Binding Effect. This Agreement shall be binding upon and
shall inure to the benefit of the parties hereto, their respective successors, assigns, and legal representatives. The Company has the right to assign this Agreement, and such assignee shall become entitled to all the rights of the Company hereunder
to the extent of such assignment. 

  
 3 

 (i) Counterparts. For the convenience of the parties and to facilitate execution, this
Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 

(j) Integration. This Agreement constitutes the entire agreement between the parties with respect to this Award and supersedes all
prior agreements and discussions between the parties concerning such subject matter. 
 5. Dispute Resolution. 

(a) Except as provided below, any dispute arising out of or relating to the Plan or this Award, this Agreement, or the breach, termination or
validity of the Plan, this Award or this Agreement, shall be finally settled by binding arbitration conducted expeditiously in accordance with the J.A.M.S./Endispute Comprehensive Arbitration Rules and Procedures (the “J.A.M.S. Rules”).
The arbitration shall be governed by the United States Arbitration Act, 9 U.S.C. Sections 1-16, and judgment upon the award rendered by the arbitrators may be entered by any court having jurisdiction thereof.
The place of arbitration shall be San Francisco, California. 
 (b) The arbitration shall commence within 60 days of the date on which a
written demand for arbitration is filed by any party hereto. In connection with the arbitration proceeding, the arbitrator shall have the power to order the production of documents by each party and any third-party witnesses. In addition, each party
may take up to three depositions as of right, and the arbitrator may in his or her discretion allow additional depositions upon good cause shown by the moving party. However, the arbitrator shall not have the power to order the answering of
interrogatories or the response to requests for admission. In connection with any arbitration, each party to the arbitration shall provide to the other, no later than seven business days before the date of the arbitration, the identity of all
persons that may testify at the arbitration and a copy of all documents that may be introduced at the arbitration or considered or used by a party’s witness or expert. The arbitrator’s decision and award shall be made and delivered within
six months of the selection of the arbitrator. The arbitrator’s decision shall set forth a reasoned basis for any award of damages or finding of liability. The arbitrator shall not have power to award damages in excess of actual compensatory
damages and shall not multiply actual damages or award punitive damages, and each party hereby irrevocably waives any claim to such damages. 

(c) The Company, the Grantee, each party to the Agreement and any other holder of Shares issued pursuant to this Agreement (each, a
“Party”) covenants and agrees that such party will participate in the arbitration in good faith. This Section 5 applies equally to requests for temporary, preliminary or permanent injunctive relief, except that in the case of
temporary or preliminary injunctive relief any party may proceed in court without prior arbitration for the limited purpose of avoiding immediate and irreparable harm. 

(d) Each Party (i) hereby irrevocably submits to the jurisdiction of any United States District Court of competent jurisdiction for the
purpose of enforcing the award or decision in any such proceeding, (ii) hereby waives, and agrees not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject

  
 4 

 
personally to the jurisdiction of the above-named courts, that its property is exempt or immune from attachment or execution (except as protected by
applicable law), that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court, and
(iii) hereby waives and agrees not to seek any review by any court of any other jurisdiction which may be called upon to grant an enforcement of the judgment of any such court. Each Party hereby consents to service of process by registered mail
at the address to which notices are to be given. Each Party agrees that its, his or her submission to jurisdiction and its, his or her consent to service of process by mail is made for the express benefit of each other Party. Final judgment against
any Party in any such action, suit or proceeding may be enforced in other jurisdictions by suit, action or proceeding on the judgment, or in any other manner provided by or pursuant to the laws of such other jurisdiction. 

[SIGNATURE PAGE FOLLOWS] 

  
 5 

 IN WITNESS WHEREOF, the Company and the Grantee have executed this Restricted Stock Agreement as
of                  ,         . 
  

			
	ZENDESK, INC.
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	Address:
	
	  

	
	  

	
	  

 The undersigned hereby acknowledges receiving and reviewing a copy of the Plan, including, without limitation,
Section 9 thereof, and understands that the Shares granted hereby are subject to the terms of the Plan and of this Agreement. 
 The undersigned also
hereby acknowledges and agrees that the Shares are subject to transfer restrictions as set forth in Section 2 of the Agreement. 
 This Agreement is
hereby accepted, and the terms and conditions hereof and of the Plan, SPECIFICALLY INCLUDING THE ARBITRATION PROVISIONS IN SECTION 5 OF THIS AGREEMENT, are hereby agreed to, by the undersigned as of the date above written. 

 

			
	GRANTEE:
	
	  

	Name:	 	
	
	Address:
	
	  

	
	  

	
	  

  
 6 

	
	 SPOUSE’S CONSENT
 I acknowledge that I have
read the
 foregoing Restricted Stock Agreement
 and understand
the contents thereof.

	
	  

  
 7 

 Exhibit A 

Restricted Stock Agreement 

Under the Zendesk, Inc. 

2009 Stock Option and Grant Plan 
 Name of
Grantee: 
 No. of Shares: 
 Grant Date: 

Per Share Purchase Price: 
 Receipt of Purchase Price $
         (the “Purchase Price”) 
 Vesting Schedule: Subject to the determination of the Committee
in its sole discretion to accelerate the vesting schedule hereunder, the risk of forfeiture shall lapse and the Shares shall become vested on the respective dates indicated below on the respective dates below: 

25% of the Shares shall vest on:                     

2.0833% of the Shares shall vest each month for 36 months beginning on
                     
 so long as the Grantee maintains
a Service Relationship on each such date. 
 Notwithstanding anything in the Agreement to the contrary in the case of a Sale Event, the
Shares shall be treated as provided in Section 3(c) of the Plan. 
 [Acceleration of Vesting Upon a Sale Event. Add any acceleration
provisions here.]EX-10.3

 Exhibit 10.3 

ZENDESK, INC. 

2014 STOCK OPTION AND INCENTIVE PLAN 

SECTION 1. GENERAL PURPOSE OF THE PLAN; DEFINITIONS 

The name of the plan is the Zendesk, Inc. 2014 Stock Option and Incentive Plan (the “Plan”). The purpose of the Plan is to encourage
and enable the officers, employees, Non-Employee Directors and other key persons (including Consultants) of Zendesk, Inc. (the “Company”) and its Subsidiaries upon whose judgment, initiative and efforts the Company largely depends for the
successful conduct of its business to acquire a proprietary interest in the Company. It is anticipated that providing such persons with a direct stake in the Company’s welfare will assure a closer identification of their interests with those of
the Company and its stockholders, thereby stimulating their efforts on the Company’s behalf and strengthening their desire to remain with the Company. 

The following terms shall be defined as set forth below: 

“Act” means the Securities Act of 1933, as amended, and the rules and regulations thereunder. 

“Administrator” means either the Board or the compensation committee of the Board or a similar committee performing the
functions of the compensation committee and which is comprised of not less than two Non-Employee Directors who are independent. 

“Award” or “Awards,” except where referring to a particular category of grant under the Plan, shall include
Incentive Stock Options, Non-Qualified Stock Options, Stock Appreciation Rights, Restricted Stock Units, Restricted Stock Awards, Unrestricted Stock Awards, Cash-Based Awards, Performance Share Awards and Dividend Equivalent Rights. 

“Award Certificate” means a written or electronic document setting forth the terms and provisions applicable to an Award
granted under the Plan. Each Award Certificate is subject to the terms and conditions of the Plan. 
 “Board” means
the Board of Directors of the Company. 
 “Cash-Based Award” means an Award entitling the recipient to receive a
cash-denominated payment. 
 “Code” means the Internal Revenue Code of 1986, as amended, and any successor Code, and
related rules, regulations and interpretations. 
 “Consultant” means any natural person that provides bona fide
services to the Company, and such services are not in connection with the offer or sale of securities in a capital-raising transaction and do not directly or indirectly promote or maintain a market for the Company’s securities. 

 “Covered Employee” means an employee who is a “Covered Employee”
within the meaning of Section 162(m) of the Code. 
 “Dividend Equivalent Right” means an Award entitling the
grantee to receive credits based on cash dividends that would have been paid on the shares of Stock specified in the Dividend Equivalent Right (or other award to which it relates) if such shares had been issued to and held by the grantee.

 “Effective Date” means the date on which the Plan is approved by stockholders as set forth in Section 21.

 “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder. 

 “Fair Market Value” of the Stock on any given date means the fair market value of the Stock determined in good faith
by the Administrator; provided, however, that if the Stock is admitted to quotation on the National Association of Securities Dealers Automated Quotation System (“NASDAQ”), NASDAQ Global Market or another national securities exchange, the
determination shall be made by reference to market quotations. If there are no market quotations for such date, the determination shall be made by reference to the last date preceding such date for which there are market quotations; provided
further, however, that if the date for which Fair Market Value is determined is the first day when trading prices for the Stock are reported on a national securities exchange, the Fair Market Value shall be the “Price to the Public” (or
equivalent) set forth on the cover page for the final prospectus relating to the Company’s Initial Public Offering. 

“Incentive Stock Option” means any Stock Option designated and qualified as an “incentive stock option” as defined
in Section 422 of the Code. 
 “Initial Public Offering” means the first offer and sale by the Company of its
Stock in an underwritten, firm-commitment public offering, or such other event as a result of or following which the Stock shall be publicly held. 

“Non-Employee Director” means a member of the Board who is not also an employee of the Company or any Subsidiary. 

“Non-Qualified Stock Option” means any Stock Option that is not an Incentive Stock Option. 

“Option” or “Stock Option” means any option to purchase shares of Stock granted pursuant to
Section 5. 
 “Performance-Based Award” means any Restricted Stock Award, Restricted Stock Units, Performance
Share Award or Cash-Based Award granted to a Covered Employee that is intended to qualify as “performance-based compensation” under Section 162(m) of the Code and the regulations promulgated thereunder. 

  
 2 

 “Performance Criteria” means the criteria that the Administrator selects for
purposes of establishing the Performance Goal or Performance Goals for an individual for a Performance Cycle. The Performance Criteria (which shall be applicable to the organizational level specified by the Administrator, including, but not limited
to, the Company or a unit, division, group, or Subsidiary of the Company) that will be used to establish Performance Goals are limited to the following: total shareholder return, earnings before interest, taxes, depreciation and amortization, net
income (loss) (either before or after interest, taxes, depreciation and/or amortization), changes in the market price of the Stock, economic value-added, funds from operations or similar measure, sales or revenue, acquisitions or strategic
transactions, operating income (loss), cash flow (including, but not limited to, operating cash flow and free cash flow), return on capital, assets, equity, or investment, return on sales, gross or net profit levels, productivity, expense, margins,
operating efficiency, customer satisfaction, working capital, earnings (loss) per share of Stock, sales or market shares and number of customers, any of which may be measured either in absolute terms or as compared to any incremental increase or as
compared to results of a peer group.  
 “Performance Cycle” means one or more periods of time, which may be of
varying and overlapping durations, as the Administrator may select, over which the attainment of one or more Performance Criteria will be measured for the purpose of determining a grantee’s right to and the payment of a Restricted Stock Award,
Restricted Stock Units, Performance Share Award or Cash-Based Award, the vesting and/or payment of which is subject to the attainment of one or more Performance Goals. Each such period shall not be less than 12 months. 

“Performance Goals” means, for a Performance Cycle, the specific goals established in writing by the Administrator for a
Performance Cycle based upon the Performance Criteria.  
 “Performance Share Award” means an Award entitling the
recipient to acquire shares of Stock upon the attainment of specified Performance Goals. 
 “Registration Effective Time”
means the date and time at which the registration statement on Form S-1 that is filed by the Company with respect to the Initial Public Offering is declared effective by the Securities and Exchange Commission. 

“Restricted Stock Award” means an Award of shares of Stock subject to such restrictions and conditions as the Administrator
may determine at the time of grant. 
 “Restricted Stock Units” means an Award of phantom stock units to a
grantee. 
 “Sale Event” shall mean (i) the sale of all or substantially all of the assets of the Company on a
consolidated basis to an unrelated person or entity, (ii) a merger, reorganization or consolidation pursuant to which the holders of the Company’s outstanding voting power and outstanding stock immediately prior to such transaction do not
own a majority of the outstanding voting power and outstanding stock or other equity interests of the resulting or successor entity (or its ultimate parent, if applicable) immediately upon completion of such transaction, (iii) the sale of all
of the Stock of the Company to an unrelated person, entity or group thereof acting in concert, or (iv) any other transaction in which the owners of the Company’s outstanding voting power immediately prior to such transaction do not own at
least a majority of the outstanding voting power of the Company or any successor entity immediately upon completion of the transaction other than as a result of the acquisition of securities directly from the Company.

  
 3 

 “Sale Price” means the value as determined by the Administrator of the
consideration payable, or otherwise to be received by stockholders, per share of Stock pursuant to a Sale Event. 
 “Section
409A” means Section 409A of the Code and the regulations and other guidance promulgated thereunder. 

“Stock” means the Common Stock, par value $0.01 per share, of the Company, subject to adjustments pursuant to
Section 3. 
 “Stock Appreciation Right” means an Award entitling the recipient to receive shares of Stock
having a value equal to the excess of the Fair Market Value of the Stock on the date of exercise over the exercise price of the Stock Appreciation Right multiplied by the number of shares of Stock with respect to which the Stock Appreciation Right
shall have been exercised. 
 “Subsidiary” means any corporation or other entity (other than the Company) in which
the Company has at least a 50 percent interest, either directly or indirectly. 
 “Ten Percent Owner” means an
employee who owns or is deemed to own (by reason of the attribution rules of Section 424(d) of the Code) more than 10 percent of the combined voting power of all classes of stock of the Company or any parent or subsidiary corporation. 

 “Unrestricted Stock Award” means an Award of shares of Stock free of any restrictions. 

 

	SECTION 2.	ADMINISTRATION OF PLAN; ADMINISTRATOR AUTHORITY TO SELECT GRANTEES AND DETERMINE AWARDS 

(a) Administration of Plan. The Plan shall be administered by the Administrator. 

(b) Powers of Administrator. The Administrator shall have the power and authority to grant Awards consistent with the terms of the
Plan, including the power and authority: 
 (i) to select the individuals to whom Awards may from time to time be granted; 

(ii) to determine the time or times of grant, and the extent, if any, of Incentive Stock Options, Non-Qualified Stock Options, Stock
Appreciation Rights, Restricted Stock Awards, Restricted Stock Units, Unrestricted Stock Awards, Cash-Based Awards, Performance Share Awards and Dividend Equivalent Rights, or any combination of the foregoing, granted to any one or more grantees;

 (iii) to determine the number of shares of Stock to be covered by any Award; 

(iv) to determine and modify from time to time the terms and conditions, including restrictions, not inconsistent with the terms of the Plan,
of any Award, which terms and conditions may differ among individual Awards and grantees, and to approve the forms of Award Certificates; 

  
 4 

 (v) to accelerate at any time the exercisability or vesting of all or any portion of any Award;

 (vi) subject to the provisions of Section 5(b), to extend at any time the period in which Stock Options may be exercised; and 

(vii) at any time to adopt, alter and repeal such rules, guidelines and practices for administration of the Plan and for its own acts and
proceedings as it shall deem advisable; to interpret the terms and provisions of the Plan and any Award (including related written instruments); to make all determinations it deems advisable for the administration of the Plan; to decide all disputes
arising in connection with the Plan; and to otherwise supervise the administration of the Plan. 
 All decisions and interpretations of the
Administrator shall be binding on all persons, including the Company and Plan grantees. 
 (c) Delegation of Authority to Grant Options
and Restricted Stock Units. Subject to applicable law, the Administrator, in its discretion, may delegate to the Chief Executive Officer of the Company all or part of the Administrator’s authority and duties with respect to the granting of
Options and/or Restricted Stock Units to individuals who are (i) not subject to the reporting and other provisions of Section 16 of the Exchange Act and (ii) not Covered Employees. Any such delegation by the Administrator shall
include a limitation as to the amount of Options and/or Restricted Stock Units that may be granted during the period of the delegation and shall contain guidelines as to the determination of the exercise price and the vesting criteria. The
Administrator may revoke or amend the terms of a delegation at any time but such action shall not invalidate any prior actions of the Administrator’s delegate or delegates that were consistent with the terms of the Plan. 

(d) Award Certificate. Awards under the Plan shall be evidenced by Award Certificates that set forth the terms, conditions and
limitations for each Award which may include, without limitation, the term of an Award and the provisions applicable in the event employment or service terminates. 

(e) Indemnification. Neither the Board nor the Administrator, nor any member of either or any delegate thereof, shall be liable for any
act, omission, interpretation, construction or determination made in good faith in connection with the Plan, and the members of the Board and the Administrator (and any delegate thereof) shall be entitled in all cases to indemnification and
reimbursement by the Company in respect of any claim, loss, damage or expense (including, without limitation, reasonable attorneys’ fees) arising or resulting therefrom to the fullest extent permitted by law and/or under the Company’s
articles or bylaws or any directors’ and officers’ liability insurance coverage which may be in effect from time to time and/or any indemnification agreement between such individual and the Company. 

  
 5 

 (f) Foreign Award Recipients. Notwithstanding any provision of the Plan to the contrary,
in order to comply with the laws in other countries in which the Company and its Subsidiaries operate or have employees or other individuals eligible for Awards, the Administrator, in its sole discretion, shall have the power and authority to:
(i) determine which Subsidiaries shall be covered by the Plan; (ii) determine which individuals outside the United States are eligible to participate in the Plan; (iii) modify the terms and conditions of any Award granted to
individuals outside the United States to comply with applicable foreign laws; (iv) establish subplans and modify exercise procedures and other terms and procedures, to the extent the Administrator determines such actions to be necessary or
advisable (and such subplans and/or modifications shall be attached to this Plan as appendices); provided, however, that no such subplans and/or modifications shall increase the share limitations contained in Section 3(a) hereof; and
(v) take any action, before or after an Award is made, that the Administrator determines to be necessary or advisable to obtain approval or comply with any local governmental regulatory exemptions or approvals. Notwithstanding the foregoing,
the Administrator may not take any actions hereunder, and no Awards shall be granted, that would violate the Exchange Act or any other applicable United States securities law, the Code, or any other applicable United States governing statute or law.

 SECTION 3. STOCK ISSUABLE UNDER THE PLAN; MERGERS; SUBSTITUTION 

(a) Stock Issuable. The maximum number of shares of Stock reserved and available for issuance under the Plan shall be the sum of
(i) 15,000,000 shares (the “Initial Limit”), (ii) the number of shares of Stock that remain available for grants under the Company’s 2009 Stock Option and Grant Plan, as amended (the “2009 Plan”) immediately prior
to the Registration Effective Time, and (iii) on January 1, 2015 and each January 1 thereafter, the number of shares of Stock reserved and available for issuance under the Plan shall be cumulatively increased by 5 percent of the
number of shares of Stock issued and outstanding on the immediately preceding December 31 (the “Annual Increase”), subject, in each case, to adjustment as provided in Section 3(b),. Subject to such overall limitation, the maximum
aggregate number of shares of Stock that may be issued in the form of Incentive Stock Options shall not exceed the Initial Limit cumulatively increased on January 1, 2015 and on each January 1 thereafter by the lesser of the Annual
Increase for such year or 15,000,000 shares of Stock, subject in all cases to adjustment as provided in Section 3(b). For purposes of this limitation, the shares of Stock underlying any Awards under the Plan or any awards under the
Company’s 2009 Plan that are forfeited, canceled, held back upon exercise of an Option or settlement of an Award to cover the exercise price or tax withholding, reacquired by the Company prior to vesting, satisfied without the issuance of Stock
or otherwise terminated (other than by exercise) shall be added back to the shares of Stock available for issuance under the Plan. In the event the Company repurchases shares of Stock on the open market, such shares shall not be added to the shares
of Stock available for issuance under the Plan. Subject to such overall limitations, shares of Stock may be issued up to such maximum number pursuant to any type or types of Award; provided, however, that Stock Options or Stock Appreciation Rights
with respect to no more than 10,000,000 shares of Stock may be granted to any one individual grantee during any one calendar year period. The shares available for issuance under the Plan may be authorized but unissued shares of Stock or shares of
Stock reacquired by the Company. 

  
 6 

 (b) Changes in Stock. Subject to Section 3(c) hereof, if, as a result of any
reorganization, recapitalization, reclassification, stock dividend, stock split, reverse stock split or other similar change in the Company’s capital stock, the outstanding shares of Stock are increased or decreased or are exchanged for a
different number or kind of shares or other securities of the Company, or additional shares or new or different shares or other securities of the Company or other non-cash assets are distributed with respect to such shares of Stock or other
securities, or, if, as a result of any merger or consolidation, sale of all or substantially all of the assets of the Company, the outstanding shares of Stock are converted into or exchanged for securities of the Company or any successor entity (or
a parent or subsidiary thereof), the Administrator shall make an appropriate or proportionate adjustment in (i) the maximum number of shares reserved for issuance under the Plan, including the maximum number of shares that may be issued in the
form of Incentive Stock Options, (ii) the number of Stock Options or Stock Appreciation Rights that can be granted to any one individual grantee and the maximum number of shares that may be granted under a Performance-Based Award,
(iii) the number and kind of shares or other securities subject to any then outstanding Awards under the Plan, (iv) the repurchase price, if any, per share subject to each outstanding Restricted Stock Award, and (v) the exercise price
for each share subject to any then outstanding Stock Options and Stock Appreciation Rights under the Plan, without changing the aggregate exercise price (i.e., the exercise price multiplied by the number of Stock Options and Stock Appreciation
Rights) as to which such Stock Options and Stock Appreciation Rights remain exercisable. The Administrator shall also make equitable or proportionate adjustments in the number of shares subject to outstanding Awards and the exercise price and the
terms of outstanding Awards to take into consideration cash dividends paid other than in the ordinary course or any other extraordinary corporate event. The adjustment by the Administrator shall be final, binding and conclusive. No fractional shares
of Stock shall be issued under the Plan resulting from any such adjustment, but the Administrator in its discretion may make a cash payment in lieu of fractional shares. 

(c) Mergers and Other Transactions. Except as the Administrator may otherwise specify with respect to particular Awards in the relevant
Award Certificate, in the case of and subject to the consummation of a Sale Event, the parties thereto may cause the assumption or continuation of Awards theretofore granted by the successor entity, or the substitution of such Awards with new Awards
of the successor entity or parent thereof, with appropriate adjustment as to the number and kind of shares and, if appropriate, the per share exercise prices, as such parties shall agree. To the extent the parties to such Sale Event do not provide
for the assumption, continuation or substitution of Awards, upon the effective time of the Sale Event, the Plan and all outstanding Awards granted hereunder shall terminate. In the event of such termination, (i) the Company shall have the
option (in its sole discretion) to make or provide for a cash payment to the grantees holding Options and Stock Appreciation Rights, in exchange for the cancellation thereof, in an amount equal to the difference between (A) the Sale Price
multiplied by the number of shares of Stock subject to outstanding Options and Stock Appreciation Rights (to the extent then exercisable at prices not in excess of the Sale Price) and (B) the aggregate exercise price of all such outstanding
Options and Stock Appreciation Rights; or (ii) each grantee shall be permitted, within a specified period of time prior to the consummation of the Sale Event as determined by the Administrator, to exercise all outstanding Options and Stock
Appreciation Rights (to the extent then exercisable) held by such grantee. 
 (d) Substitute Awards. The Administrator may grant
Awards under the Plan in substitution for stock and stock based awards held by employees, directors or other key persons of another corporation in connection with the merger or consolidation of the employing corporation with the Company or a
Subsidiary or the acquisition by the Company or a Subsidiary 

  
 7 

 
of property or stock of the employing corporation. The Administrator may direct that the substitute awards be granted on such terms and conditions as the Administrator considers appropriate in
the circumstances. Any substitute Awards granted under the Plan shall not count against the share limitation set forth in Section 3(a). 
 SECTION 4.
ELIGIBILITY 
 Grantees under the Plan will be such full or part-time officers and other employees, Non-Employee Directors and key
persons (including Consultants) of the Company and its Subsidiaries as are selected from time to time by the Administrator in its sole discretion. 

SECTION 5. STOCK OPTIONS 
 Any Stock
Option granted under the Plan shall be in such form as the Administrator may from time to time approve. 
 Stock Options granted under the
Plan may be either Incentive Stock Options or Non-Qualified Stock Options. Incentive Stock Options may be granted only to employees of the Company or any Subsidiary that is a “subsidiary corporation” within the meaning of
Section 424(f) of the Code. To the extent that any Option does not qualify as an Incentive Stock Option, it shall be deemed a Non-Qualified Stock Option. 

Stock Options granted pursuant to this Section 5 shall be subject to the following terms and conditions and shall contain such additional
terms and conditions, not inconsistent with the terms of the Plan, as the Administrator shall deem desirable. If the Administrator so determines, Stock Options may be granted in lieu of cash compensation at the optionee’s election, subject to
such terms and conditions as the Administrator may establish. 
 (a) Exercise Price. The exercise price per share for the Stock
covered by a Stock Option granted pursuant to this Section 5 shall be determined by the Administrator at the time of grant but shall not be less than 100 percent of the Fair Market Value on the date of grant. In the case of an Incentive Stock
Option that is granted to a Ten Percent Owner, the option price of such Incentive Stock Option shall be not less than 110 percent of the Fair Market Value on the grant date. 

(b) Option Term. The term of each Stock Option shall be fixed by the Administrator, but no Stock Option shall be exercisable more than
ten years after the date the Stock Option is granted. In the case of an Incentive Stock Option that is granted to a Ten Percent Owner, the term of such Stock Option shall be no more than five years from the date of grant. 

(c) Exercisability; Rights of a Stockholder. Stock Options shall become exercisable at such time or times, whether or not in
installments, as shall be determined by the Administrator at or after the grant date. The Administrator may at any time accelerate the exercisability of all or any portion of any Stock Option. An optionee shall have the rights of a stockholder only
as to shares acquired upon the exercise of a Stock Option and not as to unexercised Stock Options. 

  
 8 

 (d) Method of Exercise. Stock Options may be exercised in whole or in part, by giving
written or electronic notice of exercise to the Company, specifying the number of shares to be purchased. Payment of the purchase price may be made by one or more of the following methods to the extent provided in the Option Award Certificate: 

(i) In cash, by certified or bank check or other instrument acceptable to the Administrator; 

(ii) Through the delivery (or attestation to the ownership) of shares of Stock that are not then subject to restrictions under any Company
plan. Such surrendered shares shall be valued at Fair Market Value on the exercise date; 
 (iii) By the optionee delivering to the Company
a properly executed exercise notice together with irrevocable instructions to a broker to promptly deliver to the Company cash or a check payable and acceptable to the Company for the purchase price; provided that in the event the optionee chooses
to pay the purchase price as so provided, the optionee and the broker shall comply with such procedures and enter into such agreements of indemnity and other agreements as the Administrator shall prescribe as a condition of such payment procedure;
or 
 (iv) With respect to Stock Options that are not Incentive Stock Options, by a “net exercise” arrangement pursuant to which
the Company will reduce the number of shares of Stock issuable upon exercise by the largest whole number of shares with a Fair Market Value that does not exceed the aggregate exercise price. 

Payment instruments will be received subject to collection. The transfer to the optionee on the records of the Company or of the transfer agent of the shares
of Stock to be purchased pursuant to the exercise of a Stock Option will be contingent upon receipt from the optionee (or a purchaser acting in his stead in accordance with the provisions of the Stock Option) by the Company of the full purchase
price for such shares and the fulfillment of any other requirements contained in the Option Award Certificate or applicable provisions of laws (including the satisfaction of any withholding taxes that the Company is obligated to withhold with
respect to the optionee). In the event an optionee chooses to pay the purchase price by previously-owned shares of Stock through the attestation method, the number of shares of Stock transferred to the optionee upon the exercise of the Stock Option
shall be net of the number of attested shares. In the event that the Company establishes, for itself or using the services of a third party, an automated system for the exercise of Stock Options, such as a system using an internet website or
interactive voice response, then the paperless exercise of Stock Options may be permitted through the use of such an automated system. 

(e) Annual Limit on Incentive Stock Options. To the extent required for “incentive stock option” treatment under
Section 422 of the Code, the aggregate Fair Market Value (determined as of the time of grant) of the shares of Stock with respect to which Incentive Stock Options granted under this Plan and any other plan of the Company or its parent and
subsidiary corporations become exercisable for the first time by an optionee during any calendar year shall not exceed $100,000. To the extent that any Stock Option exceeds this limit, it shall constitute a Non-Qualified Stock Option. 

  
 9 

 SECTION 6. STOCK APPRECIATION RIGHTS 

(a) Exercise Price of Stock Appreciation Rights. The exercise price of a Stock Appreciation Right shall not be less than 100 percent of
the Fair Market Value of the Stock on the date of grant. 
 (b) Grant and Exercise of Stock Appreciation Rights. Stock Appreciation
Rights may be granted by the Administrator independently of any Stock Option granted pursuant to Section 5 of the Plan. 
 (c) Terms
and Conditions of Stock Appreciation Rights. Stock Appreciation Rights shall be subject to such terms and conditions as shall be determined from time to time by the Administrator. The term of a Stock Appreciation Right may not exceed ten years.

 SECTION 7. RESTRICTED STOCK AWARDS 

(a) Nature of Restricted Stock Awards. The Administrator shall determine the restrictions and conditions applicable to each Restricted
Stock Award at the time of grant. Conditions may be based on continuing employment (or other service relationship) and/or achievement of pre-established performance goals and objectives. The terms and conditions of each such Award Certificate shall
be determined by the Administrator, and such terms and conditions may differ among individual Awards and grantees. 
 (b) Rights as a
Stockholder. Upon the grant of the Restricted Stock Award and payment of any applicable purchase price, a grantee shall have the rights of a stockholder with respect to the voting of the Restricted Stock and receipt of dividends; provided that
if the lapse of restrictions with respect to the Restricted Stock Award is tied to the attainment of performance goals, any dividends paid by the Company during the performance period shall accrue and shall not be paid to the grantee until and to
the extent the performance goals are met with respect to the Restricted Stock Award. Unless the Administrator shall otherwise determine, (i) uncertificated Restricted Stock shall be accompanied by a notation on the records of the Company or the
transfer agent to the effect that they are subject to forfeiture until such Restricted Stock are vested as provided in Section 7(d) below, and (ii) certificated Restricted Stock shall remain in the possession of the Company until such
Restricted Stock is vested as provided in Section 7(d) below, and the grantee shall be required, as a condition of the grant, to deliver to the Company such instruments of transfer as the Administrator may prescribe. 

(c) Restrictions. Restricted Stock may not be sold, assigned, transferred, pledged or otherwise encumbered or disposed of except as
specifically provided herein or in the Restricted Stock Award Certificate. Except as may otherwise be provided by the Administrator either in the Award Certificate or, subject to Section 18 below, in writing after the Award is issued, if a
grantee’s employment (or other service relationship) with the Company and its Subsidiaries terminates for any reason, any Restricted Stock that has not vested at the time of termination shall automatically and without any requirement of notice
to such grantee from or other action by or on behalf of, the Company be deemed to have been reacquired by the Company at its original purchase price (if any) from such grantee or such grantee’s legal representative simultaneously with such
termination of employment (or other service relationship), and thereafter shall cease to 

  
 10 

 
represent any ownership of the Company by the grantee or rights of the grantee as a stockholder. Following such deemed reacquisition of unvested Restricted Stock that are represented by physical
certificates, a grantee shall surrender such certificates to the Company upon request without consideration. 
 (d) Vesting of Restricted
Stock. The Administrator at the time of grant shall specify the date or dates and/or the attainment of pre-established performance goals, objectives and other conditions on which the non-transferability of the Restricted Stock and the
Company’s right of repurchase or forfeiture shall lapse. Subsequent to such date or dates and/or the attainment of such pre-established performance goals, objectives and other conditions, the shares on which all restrictions have lapsed shall
no longer be Restricted Stock and shall be deemed “vested.” Except as may otherwise be provided by the Administrator either in the Award Certificate or, subject to Section 18 below, in writing after the Award is issued, a
grantee’s rights in any shares of Restricted Stock that have not vested shall automatically terminate upon the grantee’s termination of employment (or other service relationship) with the Company and its Subsidiaries and such shares shall
be subject to the provisions of Section 7(c) above. 
 SECTION 8. RESTRICTED STOCK UNITS 

(a) Nature of Restricted Stock Units. The Administrator shall determine the restrictions and conditions applicable to each Restricted
Stock Unit at the time of grant. Conditions may be based on continuing employment (or other service relationship) and/or achievement of pre-established performance goals and objectives. The terms and conditions of each such Award Certificate shall
be determined by the Administrator, and such terms and conditions may differ among individual Awards and grantees. At the end of the deferral period, the Restricted Stock Units, to the extent vested, shall be settled in the form of shares of Stock.
To the extent that an award of Restricted Stock Units is subject to Section 409A, it may contain such additional terms and conditions as the Administrator shall determine in its sole discretion in order for such Award to comply with the
requirements of Section 409A. 
 (b) Election to Receive Restricted Stock Units in Lieu of Compensation. The Administrator may,
in its sole discretion, permit a grantee to elect to receive a portion of future cash compensation otherwise due to such grantee in the form of an award of Restricted Stock Units. Any such election shall be made in writing and shall be delivered to
the Company no later than the date specified by the Administrator and in accordance with Section 409A and such other rules and procedures established by the Administrator. Any such future cash compensation that the grantee elects to defer shall
be converted to a fixed number of Restricted Stock Units based on the Fair Market Value of Stock on the date the compensation would otherwise have been paid to the grantee if such payment had not been deferred as provided herein. The Administrator
shall have the sole right to determine whether and under what circumstances to permit such elections and to impose such limitations and other terms and conditions thereon as the Administrator deems appropriate. Any Restricted Stock Units that are
elected to be received in lieu of cash compensation shall be fully vested, unless otherwise provided in the Award Certificate. 
 (c)
Rights as a Stockholder. A grantee shall have the rights as a stockholder only as to shares of Stock acquired by the grantee upon settlement of Restricted Stock Units; provided, however, that the grantee may be credited with Dividend
Equivalent Rights with respect to the phantom stock units underlying his Restricted Stock Units, subject to such terms and conditions as the Administrator may determine. 

  
 11 

 (d) Termination. Except as may otherwise be provided by the Administrator either in the
Award Certificate or, subject to Section 18 below, in writing after the Award is issued, a grantee’s right in all Restricted Stock Units that have not vested shall automatically terminate upon the grantee’s termination of employment
(or cessation of service relationship) with the Company and its Subsidiaries for any reason. 
 SECTION 9. UNRESTRICTED STOCK AWARDS 

Grant or Sale of Unrestricted Stock. The Administrator may, in its sole discretion, grant (or sell at par value or such higher purchase
price determined by the Administrator) an Unrestricted Stock Award under the Plan. Unrestricted Stock Awards may be granted in respect of past services or other valid consideration, or in lieu of cash compensation due to such grantee. 

SECTION 10. CASH-BASED AWARDS 
 Grant
of Cash-Based Awards. The Administrator may, in its sole discretion, grant Cash-Based Awards to any grantee in such number or amount and upon such terms, and subject to such conditions, as the Administrator shall determine at the time of grant.
The Administrator shall determine the maximum duration of the Cash-Based Award, the amount of cash to which the Cash-Based Award pertains, the conditions upon which the Cash-Based Award shall become vested or payable, and such other provisions as
the Administrator shall determine. Each Cash-Based Award shall specify a cash-denominated payment amount, formula or payment ranges as determined by the Administrator. Payment, if any, with respect to a Cash-Based Award shall be made in accordance
with the terms of the Award and may be made in cash or in shares of Stock, as the Administrator determines. 
 SECTION 11. PERFORMANCE SHARE AWARDS

 (a) Nature of Performance Share Awards. The Administrator may, in its sole discretion, grant Performance Share Awards independent
of, or in connection with, the granting of any other Award under the Plan. The Administrator shall determine whether and to whom Performance Share Awards shall be granted, the Performance Goals, the periods during which performance is to be
measured, which may not be less than one year except in the case of a Sale Event, and such other limitations and conditions as the Administrator shall determine. 

(b) Rights as a Stockholder. A grantee receiving a Performance Share Award shall have the rights of a stockholder only as to shares
actually received by the grantee under the Plan and not with respect to shares subject to the Award but not actually received by the grantee. A grantee shall be entitled to receive shares of Stock under a Performance Share Award only upon
satisfaction of all conditions specified in the Performance Share Award Certificate (or in a performance plan adopted by the Administrator). 

(c) Termination. Except as may otherwise be provided by the Administrator either in the Award agreement or, subject to Section 18
below, in writing after the Award is issued, a grantee’s rights in all Performance Share Awards shall automatically terminate upon the grantee’s termination of employment (or cessation of service relationship) with the Company and its
Subsidiaries for any reason. 

  
 12 

 SECTION 12. PERFORMANCE-BASED AWARDS TO COVERED EMPLOYEES 

(a) Performance-Based Awards. Any employee or other key person providing services to the Company and who is selected by the
Administrator may be granted one or more Performance-Based Awards in the form of a Restricted Stock Award, Restricted Stock Units, Performance Share Awards or Cash-Based Award payable upon the attainment of Performance Goals that are established by
the Administrator and relate to one or more of the Performance Criteria, in each case on a specified date or dates or over any period or periods determined by the Administrator. The Administrator shall define in an objective fashion the manner of
calculating the Performance Criteria it selects to use for any Performance Cycle. Depending on the Performance Criteria used to establish such Performance Goals, the Performance Goals may be expressed in terms of overall Company performance or the
performance of a division, business unit, or an individual. The Administrator, in its discretion, may adjust or modify the calculation of Performance Goals for such Performance Cycle in order to prevent the dilution or enlargement of the rights of
an individual (i) in the event of, or in anticipation of, any unusual or extraordinary corporate item, transaction, event or development, (ii) in recognition of, or in anticipation of, any other unusual or nonrecurring events affecting the
Company, or the financial statements of the Company, or (iii) in response to, or in anticipation of, changes in applicable laws, regulations, accounting principles, or business conditions provided however, that the Administrator may not
exercise such discretion in a manner that would increase the Performance-Based Award granted to a Covered Employee. Each Performance-Based Award shall comply with the provisions set forth below. 

(b) Grant of Performance-Based Awards. With respect to each Performance-Based Award granted to a Covered Employee, the Administrator
shall select, within the first 90 days of a Performance Cycle (or, if shorter, within the maximum period allowed under Section 162(m) of the Code) the Performance Criteria for such grant, and the Performance Goals with respect to each
Performance Criterion (including a threshold level of performance below which no amount will become payable with respect to such Award). Each Performance-Based Award will specify the amount payable, or the formula for determining the amount payable,
upon achievement of the various applicable performance targets. The Performance Criteria established by the Administrator may be (but need not be) different for each Performance Cycle and different Performance Goals may be applicable to
Performance-Based Awards to different Covered Employees. 
 (c) Payment of Performance-Based Awards. Following the completion of a
Performance Cycle, the Administrator shall meet to review and certify in writing whether, and to what extent, the Performance Goals for the Performance Cycle have been achieved and, if so, to also calculate and certify in writing the amount of the
Performance-Based Awards earned for the Performance Cycle. The Administrator shall then determine the actual size of each Covered Employee’s Performance-Based Award, and, in doing so, may reduce or eliminate the amount of the Performance-Based
Award for a Covered Employee if, in its sole judgment, such reduction or elimination is appropriate. 

  
 13 

 (d) Maximum Award Payable. The maximum Performance-Based Award payable to any one Covered
Employee under the Plan for a Performance Cycle is 10,000,000 shares of Stock (subject to adjustment as provided in Section 3(b) hereof) or $5 million in the case of a Performance-Based Award that is a Cash-Based Award. 

SECTION 13. DIVIDEND EQUIVALENT RIGHTS 

(a) Dividend Equivalent Rights. A Dividend Equivalent Right may be granted hereunder to any grantee as a component of an award of
Restricted Stock Units, Restricted Stock Award or Performance Share Award or as a freestanding award. The terms and conditions of Dividend Equivalent Rights shall be specified in the Award Certificate. Dividend equivalents credited to the holder of
a Dividend Equivalent Right may be paid currently or may be deemed to be reinvested in additional shares of Stock, which may thereafter accrue additional equivalents. Any such reinvestment shall be at Fair Market Value on the date of reinvestment or
such other price as may then apply under a dividend reinvestment plan sponsored by the Company, if any. Dividend Equivalent Rights may be settled in cash or shares of Stock or a combination thereof, in a single installment or installments. A
Dividend Equivalent Right granted as a component of an award of Restricted Stock Units or Restricted Stock Award with performance vesting or Performance Share Award shall provide that such Dividend Equivalent Right shall be settled only upon
settlement or payment of, or lapse of restrictions on, such other Award, and that such Dividend Equivalent Right shall expire or be forfeited or annulled under the same conditions as such other Award. 

(b) Interest Equivalents. Any Award under this Plan that is settled in whole or in part in cash on a deferred basis may provide in the
grant for interest equivalents to be credited with respect to such cash payment. Interest equivalents may be compounded and shall be paid upon such terms and conditions as may be specified by the grant. 

(c) Termination. Except as may otherwise be provided by the Administrator either in the Award Certificate or, subject to
Section 18 below, in writing after the Award is issued, a grantee’s rights in all Dividend Equivalent Rights or interest equivalents granted as a component of an award of Restricted Stock Units, Restricted Stock Award or Performance Share
Award that has not vested shall automatically terminate upon the grantee’s termination of employment (or cessation of service relationship) with the Company and its Subsidiaries for any reason. 

SECTION 14. TRANSFERABILITY OF AWARDS 

(a) Transferability. Except as provided in Section 14(b) below, during a grantee’s lifetime, his or her Awards shall be
exercisable only by the grantee, or by the grantee’s legal representative or guardian in the event of the grantee’s incapacity. No Awards shall be sold, assigned, transferred or otherwise encumbered or disposed of by a grantee other than
by will or by the laws of descent and distribution or pursuant to a domestic relations order. No Awards shall be subject, in whole or in part, to attachment, execution, or levy of any kind, and any purported transfer in violation hereof shall be
null and void. 

  
 14 

 (b) Administrator Action. Notwithstanding Section 14(a), the Administrator, in its
discretion, may provide either in the Award Certificate regarding a given Award or by subsequent written approval that the grantee (who is an employee or director) may transfer his or her Non-Qualified Options to his or her immediate family members,
to trusts for the benefit of such family members, or to partnerships in which such family members are the only partners, provided that the transferee agrees in writing with the Company to be bound by all of the terms and conditions of this Plan and
the applicable Award. In no event may an Award be transferred by a grantee for value. 
 (c) Family Member. For purposes of
Section 14(b), “family member” shall mean a grantee’s child, stepchild, grandchild, parent, stepparent, grandparent, spouse, former spouse, sibling, niece, nephew, mother-in-law, father-in-law, son-in-law, daughter-in-law,
brother-in-law, or sister-in-law, including adoptive relationships, any person sharing the grantee’s household (other than a tenant of the grantee), a trust in which these persons (or the grantee) have more than 50 percent of the beneficial
interest, a foundation in which these persons (or the grantee) control the management of assets, and any other entity in which these persons (or the grantee) own more than 50 percent of the voting interests. 

(d) Designation of Beneficiary. Each grantee to whom an Award has been made under the Plan may designate a beneficiary or beneficiaries
to exercise any Award or receive any payment under any Award payable on or after the grantee’s death. Any such designation shall be on a form provided for that purpose by the Administrator and shall not be effective until received by the
Administrator. If no beneficiary has been designated by a deceased grantee, or if the designated beneficiaries have predeceased the grantee, the beneficiary shall be the grantee’s estate. 

SECTION 15. TAX WITHHOLDING 
 (a)
Payment by Grantee. Each grantee shall, no later than the date as of which the value of an Award or of any Stock or other amounts received thereunder first becomes includable in the gross income of the grantee for Federal income tax purposes,
pay to the Company, or make arrangements satisfactory to the Administrator regarding payment of, any Federal, state, or local taxes of any kind required by law to be withheld by the Company with respect to such income. The Company and its
Subsidiaries shall, to the extent permitted by law, have the right to deduct any such taxes from any payment of any kind otherwise due to the grantee. The Company’s obligation to deliver evidence of book entry (or stock certificates) to any
grantee is subject to and conditioned on tax withholding obligations being satisfied by the grantee. 
 (b) Payment in Stock. Subject
to approval by the Administrator, the Company’s minimum required tax withholding obligation may be satisfied, in whole or in part, by the Company withholding from shares of Stock to be issued pursuant to any Award a number of shares with an
aggregate Fair Market Value (as of the date the withholding is effected) that would satisfy the withholding amount due. 

  
 15 

 SECTION 16. SECTION 409A AWARDS 

To the extent that any Award is determined to constitute “nonqualified deferred compensation” within the meaning of Section 409A
(a “409A Award”), the Award shall be subject to such additional rules and requirements as specified by the Administrator from time to time in order to comply with Section 409A. In this regard, if any amount under a 409A Award is
payable upon a “separation from service” (within the meaning of Section 409A) to a grantee who is then considered a “specified employee” (within the meaning of Section 409A), then no such payment shall be made prior to
the date that is the earlier of (i) six months and one day after the grantee’s separation from service, or (ii) the grantee’s death, but only to the extent such delay is necessary to prevent such payment from being subject to
interest, penalties and/or additional tax imposed pursuant to Section 409A. Further, the settlement of any such Award may not be accelerated except to the extent permitted by Section 409A. 

SECTION 17. TRANSFER, LEAVE OF ABSENCE, ETC. 

For purposes of the Plan, the following events shall not be deemed a termination of employment: 

(a) a transfer to the employment of the Company from a Subsidiary or from the Company to a Subsidiary, or from one Subsidiary to another; or

 (b) an approved leave of absence for military service or sickness, or for any other purpose approved by the Company, if the
employee’s right to re-employment is guaranteed either by a statute or by contract or under the policy pursuant to which the leave of absence was granted or if the Administrator otherwise so provides in writing. 

SECTION 18. AMENDMENTS AND TERMINATION 

The Board may, at any time, amend or discontinue the Plan and the Administrator may, at any time, amend or cancel any outstanding Award for the
purpose of satisfying changes in law or for any other lawful purpose, but no such action shall adversely affect rights under any outstanding Award without the holder’s consent. The Administrator is specifically authorized to exercise its
discretion to reduce the exercise price of outstanding Stock Options or Stock Appreciation Rights or effect the repricing of such Awards through cancellation and re-grants. To the extent required under the rules of any securities exchange or market
system on which the Stock is listed, to the extent determined by the Administrator to be required by the Code to ensure that Incentive Stock Options granted under the Plan are qualified under Section 422 of the Code, or to ensure that
compensation earned under Awards qualifies as performance-based compensation under Section 162(m) of the Code, Plan amendments shall be subject to approval by the Company stockholders entitled to vote at a meeting of stockholders. Nothing in
this Section 18 shall limit the Administrator’s authority to take any action permitted pursuant to Section 3(b) or 3(c). 
 SECTION 19.
STATUS OF PLAN 
 With respect to the portion of any Award that has not been exercised and any payments in cash, Stock or other
consideration not received by a grantee, a grantee shall have no rights greater than those of a general creditor of the Company unless the Administrator shall otherwise expressly determine in connection with any Award or Awards. In its sole
discretion, the Administrator may authorize the creation of trusts or other arrangements to meet the Company’s obligations to deliver Stock or make payments with respect to Awards hereunder, provided that the existence of such trusts or other
arrangements is consistent with the foregoing sentence. 

  
 16 

 SECTION 20. GENERAL PROVISIONS 

(a) No Distribution. The Administrator may require each person acquiring Stock pursuant to an Award to represent to and agree with the
Company in writing that such person is acquiring the shares without a view to distribution thereof. 
 (b) Delivery of Stock
Certificates. Stock certificates to grantees under this Plan shall be deemed delivered for all purposes when the Company or a stock transfer agent of the Company shall have mailed such certificates in the United States mail, addressed to the
grantee, at the grantee’s last known address on file with the Company. Uncertificated Stock shall be deemed delivered for all purposes when the Company or a Stock transfer agent of the Company shall have given to the grantee by electronic mail
(with proof of receipt) or by United States mail, addressed to the grantee, at the grantee’s last known address on file with the Company, notice of issuance and recorded the issuance in its records (which may include electronic “book
entry” records). Notwithstanding anything herein to the contrary, the Company shall not be required to issue or deliver any certificates evidencing shares of Stock pursuant to the exercise of any Award, unless and until the Administrator has
determined, with advice of counsel (to the extent the Administrator deems such advice necessary or advisable), that the issuance and delivery of such certificates is in compliance with all applicable laws, regulations of governmental authorities
and, if applicable, the requirements of any exchange on which the shares of Stock are listed, quoted or traded. All Stock certificates delivered pursuant to the Plan shall be subject to any stop-transfer orders and other restrictions as the
Administrator deems necessary or advisable to comply with federal, state or foreign jurisdiction, securities or other laws, rules and quotation system on which the Stock is listed, quoted or traded. The Administrator may place legends on any Stock
certificate to reference restrictions applicable to the Stock. In addition to the terms and conditions provided herein, the Administrator may require that an individual make such reasonable covenants, agreements, and representations as the
Administrator, in its discretion, deems necessary or advisable in order to comply with any such laws, regulations, or requirements. The Administrator shall have the right to require any individual to comply with any timing or other restrictions with
respect to the settlement or exercise of any Award, including a window-period limitation, as may be imposed in the discretion of the Administrator. 

(c) Stockholder Rights. Until Stock is deemed delivered in accordance with Section 20(b), no right to vote or receive dividends or
any other rights of a stockholder will exist with respect to shares of Stock to be issued in connection with an Award, notwithstanding the exercise of a Stock Option or any other action by the grantee with respect to an Award. 

(d) Other Compensation Arrangements; No Employment Rights. Nothing contained in this Plan shall prevent the Board from adopting other
or additional compensation arrangements, including trusts, and such arrangements may be either generally applicable or applicable only in specific cases. The adoption of this Plan and the grant of Awards do not confer upon any employee any right to
continued employment with the Company or any Subsidiary. 

  
 17 

 (e) Trading Policy Restrictions. Option exercises and other Awards under the Plan shall be
subject to the Company’s insider trading policies and procedures, as in effect from time to time. 
 (f) Forfeiture of Awards under
Sarbanes-Oxley Act. If the Company is required to prepare an accounting restatement due to the material noncompliance of the Company, as a result of misconduct, with any financial reporting requirement under the securities laws, then any grantee
who is one of the individuals subject to automatic forfeiture under Section 304 of the Sarbanes-Oxley Act of 2002 shall reimburse the Company for the amount of any Award received by such individual under the Plan during the 12-month period
following the first public issuance or filing with the United States Securities and Exchange Commission, as the case may be, of the financial document embodying such financial reporting requirement. 

SECTION 21. EFFECTIVE DATE OF PLAN 
 This
Plan shall become effective upon the last to occur of (i) stockholder approval of the Plan in accordance with applicable state law, the Company’s bylaws and articles of incorporation, and applicable stock exchange rules and
(ii) immediately prior to the date of the Registration Effective Time. No grants of Stock Options and other Awards may be made hereunder after the tenth anniversary of the Effective Date and no grants of Incentive Stock Options may be made
hereunder after the tenth anniversary of the date the Plan is approved by the Board. 
 SECTION 22. GOVERNING LAW 

This Plan and all Awards and actions taken thereunder shall be governed by, and construed in accordance with, the laws of the State of
Delaware, applied without regard to conflict of law principles. 
 DATE APPROVED BY BOARD OF DIRECTORS: 

DATE APPROVED BY STOCKHOLDERS: 

  
 18 

 INCENTIVE STOCK OPTION AGREEMENT 

UNDER THE ZENDESK, INC. 

2014 STOCK OPTION AND INCENTIVE PLAN 
  

									
	Name of Optionee:	 		 		 		 	
		 	  
	 	
				
	No. of Option Shares:	 		 		 	
		 	  
	 		 	
					
	Option Exercise Price per Share:	 	$	 		 		 	
		 		 	  
	 		 	
		 	[FMV on Grant Date (110% of FMV if a 10% owner)]
					
	Grant Date:	 		 		 		 	
		 	  
	 		 	
					
	Expiration Date:	 		 		 		 	
		 	  
	 		 	
		 	[up to 10 years (5 if a 10% owner)]

 Pursuant to the Zendesk, Inc. 2014 Stock Option and Incentive Plan as amended through the date hereof (the
“Plan”), Zendesk, Inc. (the “Company”) hereby grants to the Optionee named above an option (the “Stock Option”) to purchase on or prior to the Expiration Date specified above all or part of the number of shares of
Common Stock, par value $0.01 per share (the “Stock”), of the Company specified above at the Option Exercise Price per Share specified above subject to the terms and conditions set forth herein and in the Plan. 

1. Exercisability Schedule. No portion of this Stock Option may be exercised until such portion shall have become exercisable. Except
as set forth below, and subject to the discretion of the Administrator (as defined in Section 2 of the Plan) to accelerate the exercisability schedule hereunder, this Stock Option shall be exercisable with respect to the following number of
Option Shares on the dates indicated so long as the Optionee remains an employee of the Company or a Subsidiary on such dates: 
  

			
	 Incremental Number of Option Shares Exercisable*
	  	 Exercisability Date

		
	              (    %)
	  	            
	              (    %)
	  	
	              (    %)
	  	
	              (    %)
	  	
	              (    %)
	  	

  

	*	Max. of $100,000 per yr. 

 Once exercisable, this Stock Option shall continue to be exercisable
at any time or times prior to the close of business on the Expiration Date, subject to the provisions hereof and of the Plan. 

 2. Manner of Exercise. 

(a) The Optionee may exercise this Stock Option only in the following manner: from time to time on or prior to the Expiration Date of this
Stock Option, the Optionee may give written notice to the Administrator of his or her election to purchase some or all of the Option Shares purchasable at the time of such notice. This notice shall specify the number of Option Shares to be
purchased. 
 Payment of the purchase price for the Option Shares may be made by one or more of the following methods: (i) in cash, by
certified or bank check or other instrument acceptable to the Administrator; (ii) through the delivery (or attestation to the ownership) of shares of Stock that have been purchased by the Optionee on the open market or that are beneficially
owned by the Optionee and are not then subject to any restrictions under any Company plan and that otherwise satisfy any holding periods as may be required by the Administrator; or (iii) by the Optionee delivering to the Company a properly
executed exercise notice together with irrevocable instructions to a broker to promptly deliver to the Company cash or a check payable and acceptable to the Company to pay the option purchase price, provided that in the event the Optionee chooses to
pay the option purchase price as so provided, the Optionee and the broker shall comply with such procedures and enter into such agreements of indemnity and other agreements as the Administrator shall prescribe as a condition of such payment
procedure; or (iv) a combination of (i), (ii) and (iii) above. Payment instruments will be received subject to collection. 

The transfer to the Optionee on the records of the Company or of the transfer agent of the Option Shares will be contingent upon (i) the
Company’s receipt from the Optionee of the full purchase price for the Option Shares, as set forth above, (ii) the satisfaction of any obligations for Tax-Related Items (as defined below) due in connection with the Option, (iii) the
fulfillment of any other requirements contained herein or in the Plan or in any other agreement or provision of laws, and (iv) the receipt by the Company of any agreement, statement or other evidence that the Company may require to satisfy
itself that the issuance of Stock to be purchased pursuant to the exercise of Stock Options under the Plan and any subsequent resale of the shares of Stock will be in compliance with applicable laws and regulations. In the event the Optionee chooses
to pay the purchase price by previously-owned shares of Stock through the attestation method, the number of shares of Stock transferred to the Optionee upon the exercise of the Stock Option shall be net of the Shares attested to. 

(b) The shares of Stock purchased upon exercise of this Stock Option shall be transferred to the Optionee on the records of the Company or of
the transfer agent upon compliance to the satisfaction of the Administrator with all requirements under applicable laws or regulations in connection with such transfer and with the requirements hereof and of the Plan. The determination of the
Administrator as to such compliance shall be final and binding on the Optionee. The Optionee shall not be deemed to be the holder of, or to have any of the rights of a holder with respect to, any shares of Stock subject to this Stock Option unless
and until this Stock Option shall have been exercised pursuant to the terms hereof, the Company or the transfer agent shall have transferred the shares to the Optionee, and the Optionee’s name shall have been entered as the stockholder of
record on the books of the Company. Thereupon, the Optionee shall have full voting, dividend and other ownership rights with respect to such shares of Stock. 

  
 2 

 (c) The minimum number of shares with respect to which this Stock Option may be exercised at any
one time shall be 100 shares, unless the number of shares with respect to which this Stock Option is being exercised is the total number of shares subject to exercise under this Stock Option at the time. 

(d) Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be exercisable after the Expiration Date
hereof. 
 3. Termination of Employment. If the Optionee’s employment by the Company or a Subsidiary (as defined in the Plan) is
terminated, the period within which to exercise the Stock Option may be subject to earlier termination as set forth below. 
 (a)
Termination Due to Death. If the Optionee’s employment terminates by reason of the Optionee’s death, any portion of this Stock Option outstanding on such date, to the extent exercisable on the date of death, may thereafter be
exercised by the Optionee’s legal representative or legatee for a period of [12] months from the date of death or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of death shall
terminate immediately and be of no further force or effect. 
 (b) Termination Due to Disability. If the Optionee’s employment
terminates by reason of the Optionee’s disability (as determined by the Administrator), any portion of this Stock Option outstanding on such date, to the extent exercisable on the date of such termination, may thereafter be exercised by the
Optionee for a period of [12] months from the date of termination or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of termination shall terminate immediately and be of no further
force or effect. 
 (c) Termination for Cause. If the Optionee’s employment terminates for Cause, any portion of this Stock
Option outstanding on such date shall terminate immediately and be of no further force and effect. For purposes hereof, “Cause” shall mean, unless otherwise provided in an employment agreement between the Company and the Optionee, a
determination by the Administrator that the Optionee shall be dismissed as a result of (i) any material breach by the Optionee of any agreement between the Optionee and the Company or any Subsidiary; (ii) the conviction of, indictment for
or plea of nolo contendere by the Optionee to a felony or a crime involving moral turpitude; or (iii) any material misconduct or willful and deliberate non-performance (other than by reason of disability) by the Optionee of the Optionee’s
duties to the Company or any Subsidiary. 
 (d) Other Termination. If the Optionee’s employment terminates for any reason other
than the Optionee’s death, the Optionee’s disability, or Cause, and unless otherwise determined by the Administrator, any portion of this Stock Option outstanding on such date may be exercised, to the extent exercisable on the date of
termination, for a period of three months from the date of termination or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of termination shall terminate immediately and be of no further
force or effect. 

  
 3 

 The Administrator’s determination of the reason for termination of the Optionee’s
employment shall be conclusive and binding on the Optionee and his or her representatives or legatees. 
 4. Incorporation of Plan.
Notwithstanding anything herein to the contrary, this Stock Option shall be subject to and governed by all the terms and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms
in this Agreement shall have the meaning specified in the Plan, unless a different meaning is specified herein. 
 5.
Transferability. This Agreement is personal to the Optionee, is non-assignable and is not transferable in any manner, by operation of law or otherwise, other than by will or the laws of descent and distribution. This Stock Option is
exercisable, during the Optionee’s lifetime, only by the Optionee, and thereafter, only by the Optionee’s legal representative or legatee. 

6. Status of the Stock Option. This Stock Option is intended to qualify as an “incentive stock option” under Section 422
of the Internal Revenue Code of 1986, as amended (the “Code”), but the Company does not represent or warrant that this Stock Option qualifies as such. The Optionee should consult with his or her own tax advisors regarding the tax effects
of this Stock Option and the requirements necessary to obtain favorable income tax treatment under Section 422 of the Code, including, but not limited to, holding period requirements. To the extent any portion of this Stock Option does not so
qualify as an “incentive stock option,” such portion shall be deemed to be a non-qualified stock option. If the Optionee intends to dispose or does dispose (whether by sale, gift, transfer or otherwise) of any Option Shares within the
one-year period beginning on the date after the transfer of such shares to him or her, or within the two-year period beginning on the day after the grant of this Stock Option, he or she will so notify the Company within 30 days after such
disposition. 
 7. Responsibility for Taxes. The Optionee acknowledges that, regardless of any action taken by the Company or, if
different, the Subsidiary which employs the Optionee (the “Employer”), the ultimate liability for all Federal, state and other income tax, social insurance, payroll tax, fringe benefits tax, payment on account or other tax related items
related to the Optionee’s participation in the Plan and legally applicable to the Optionee (“Tax-Related Items”) is and remains the Optionee’s responsibility and may exceed the amount actually withheld by the Company or the
Employer. The Optionee further acknowledges that the Company and/or the Employer (i) make no representations or undertakings regarding the treatment of any Tax-Related Items in connection with any aspect of this Stock Option, including, but not
limited to, the grant, vesting or exercise of this Stock Option, the subsequent sale of Option Shares acquired pursuant to such exercise and the receipt of any dividends; and (ii) do not commit to and are under no obligation to structure the
terms of the grant or any aspect of this Stock Option to reduce or eliminate the Optionee’s liability for Tax-Related Items or achieve any particular tax result. Further, if the Optionee is subject to Tax-Related Items in more than one
jurisdiction between the Grant Date and the date of any relevant taxable or tax withholding event, as applicable, the Optionee acknowledges that the Company and/or the Employer (or former employer, as applicable) may be required to withhold or
account for Tax-Related Items in more than one jurisdiction. 

  
 4 

 (a) Prior to the relevant taxable or tax withholding event, as applicable, the Optionee agrees to
make adequate arrangements satisfactory to the Company and/or the Employer to satisfy all Tax-Related Items to the extent applicable. In this regard, the Optionee authorizes the Company or its agent to satisfy the obligations with regard to all
Tax-Related Items by one or a combination of the following: 
 (i) withholding from the Optionee’s wages or other cash
compensation paid to the Optionee by the Company and/or the Employer; or 
 (ii) withholding from proceeds of the sale of
Option Shares acquired upon exercise of the Stock Option either through a voluntary sale or through a mandatory sale arranged by the Company (on the Optionee’s behalf pursuant to this authorization without further consent); or 

(iii) withholding in Option Shares to be issued upon exercise of the Option a number of shares of Stock with an aggregate Fair
Market Value that would satisfy the minimum withholding amount due; or 
 (iv) by any other method deemed by the Company to
comply with applicable laws. 
 (b) Depending on the withholding method and subject to the foregoing, the Company may withhold or account
for Tax-Related Items by considering applicable minimum statutory withholding amounts or other applicable withholding rates, including maximum applicable rates, in which case the Optionee will receive a refund of any over-withheld amount in cash and
will have no entitlement to the equivalent in shares. If the obligation for Tax-Related Items is satisfied by withholding in Option Shares, for tax purposes, the Optionee is deemed to have been issued the full number of Option Shares subject to the
exercised Stock Option, notwithstanding that a number of the Option Shares are held back solely for the purpose of paying the Tax-Related Items. 

(c) Finally, the Optionee agrees to pay to the Company or the Employer any amount of Tax-Related Items that the Company or the Employer may be
required to withhold or account for as a result of the Optionee’s participation in the Plan that cannot be satisfied by the means previously described. The Company may refuse to issue or deliver the Option Shares or the proceeds of the sale of
Option Shares if the Optionee fails to comply with his or her obligations in connection with the Tax-Related Items. 
 8. No Obligation
to Continue Employment. Neither the Company nor any Subsidiary is obligated by or as a result of the Plan or this Agreement to continue the Optionee in employment and neither the Plan nor this Agreement shall interfere in any way with the right
of the Company or any Subsidiary to terminate the employment of the Optionee at any time. 
 9. Integration. This Agreement
constitutes the entire agreement between the parties with respect to this Stock Option and supersedes all prior agreements and discussions between the parties concerning such subject matter. 

  
 5 

 10. Nature of Grant. In accepting this Stock Option, the Optionee acknowledges,
understands and agrees that: 
 (a) the Plan is established voluntarily by the Company and it is discretionary in nature and it may be
modified, amended, suspended or terminated by the Company at any time, to the extent permitted by the Plan; 
 (b) the grant of this Stock
Option is voluntary and occasional and does not create any contractual or other right to receive future grants of stock options, or benefits in lieu of stock options, even if stock options have been granted in the past; 

(c) all decisions with respect to future stock option or other grants, if any, will be at the sole discretion of the Company; 

(d) this Stock Option grant and the Optionee’s participation in the Plan shall not be interpreted as forming an employment contract with
the Company; 
 (e) the Optionee is voluntarily participating in the Plan; 

(f) this Stock Option and any Option Shares acquired under the Plan are not intended to replace any pension rights or compensation; 

(g) this Stock Option and any Option Shares acquired under the Plan, and the income and value of same, are not part of normal or expected
compensation for any purpose, including, without limitation, calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses, long-service awards, pension or retirement benefits or payments or welfare
benefits or similar payments; 
 (h) the future value of this Option Shares underlying the Stock Option is unknown, indeterminable, and
cannot be predicted with certainty; 
 (i) if the underlying Option Shares do not increase in value, this Stock Option will have no value;

 (j) if the Optionee exercises this Stock Option and acquires Option Shares, the value of such Option Shares may increase or decrease in
value, even below the Option Exercise Price; 
 (k) no claim or entitlement to compensation or damages shall arise from forfeiture of this
Stock Option resulting from the termination of the Optionee’s employment relationship (for any reason whatsoever, whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Optionee is employed or the
terms of the Optionee’s employment agreement, if any), and in consideration of the grant of this Stock Option to which the Optionee is otherwise not entitled, the Optionee irrevocably agrees never to institute any claim against the Employer,
the Company or any of its Subsidiaries, waives his or her ability, if any, to bring any such claim, and releases the Employer, the Company and its Subsidiaries from any such claim; if, notwithstanding the foregoing, any such claim is allowed by a
court of competent jurisdiction, then, by participating in the Plan, the Optionee shall be deemed irrevocably to have agreed not to pursue such claim and agrees to execute any and all documents necessary to request dismissal or withdrawal of such
claim; and 
 (l) unless otherwise provided in the Plan or by the Company in its discretion, this Stock Option and the benefits evidenced by
this Agreement do not create any entitlement to have this Stock Option or any such benefits transferred to, or assumed by, another company nor to be exchanged, cashed out or substituted for, in connection with any corporate transaction affecting the
Stock. 

  
 6 

 11. No Advice Regarding Grant. The Company is not providing any tax, legal or financial
advice, nor is the Company making any recommendations regarding the Optionee’s participation in the Plan, or the Optionee’s acquisition or sale of the underlying Option Shares. The Optionee is hereby advised to consult with his or her own
personal tax, legal and financial advisors regarding his or her participation in the Plan before taking any action related to the Plan. 

12. Data Privacy. The Optionee hereby explicitly and unambiguously consents to the collection, use and transfer, in electronic or
other form, of the Optionee’s personal data as described in this Agreement and any other Stock Option grant materials by and among, as applicable, the Employer, the Company and any Subsidiary for the exclusive purpose of implementing,
administering and managing the Optionee’s participation in the Plan. 
 The Optionee understands that the Employer, the
Company and its Subsidiaries may hold certain personal information about the Optionee, including, but not limited to, the Optionee’s name, home address and telephone number, date of birth, social insurance number or other identification number,
salary, nationality, job title, any shares of stock or directorships held in the Company, details of all stock options or any other entitlement to shares of stock awarded, canceled, exercised, vested, unvested or outstanding in the Optionee’s
favor (“Data”), for the exclusive purpose of implementing, administering and managing the Plan. 
 The Optionee
understands that Data will be transferred to the stock plan service provider selected by the Company, which is assisting the Company with the implementation, administration and management of the Plan. The Optionee understands that the recipients of
the Data may be located in the United States or elsewhere, and that the recipient’s country (e.g., the United States) may have different data privacy laws and protections than the Optionee’s country. The Optionee understands that he or she
may request a list with the names and addresses of any potential recipients of the Data by contacting his or her local human resources representative. The Optionee authorizes the Company, the stock plan service provider and any other possible
recipients which may assist the Company (presently or in the future) with implementing, administering and managing the Plan to receive, possess, use, retain and transfer the Data, in electronic or other form, for the sole purposes of implementing,
administering and managing the Optionee’s participation in the Plan. The Optionee understands that Data will be held only as long as is necessary to implement, administer and manage the Optionee’s participation in the Plan. The Optionee
understands that he or she may, at any time, view Data, request additional information about the storage and processing of Data, require any necessary amendments to Data or refuse or withdraw the consents herein, in any case without cost, by
contacting in writing his or her local human 

  
 7 

 
resources representative. Further, the Optionee understands that he or she is providing the consents herein on a purely voluntary basis. If the Optionee does not consent, or if the Optionee later
seeks to revoke his or her consent, his or her employment status or service and career with the Company or any Subsidiary will not be adversely affected; the only adverse consequence of refusing or withdrawing consent is that the Company would not
be able to grant the Optionee Stock Options or other equity awards or administer or maintain such awards. Therefore, the Optionee understands that refusing or withdrawing his or her consent may affect the Optionee’s ability to participate in
the Plan. For more information on the consequences of the Optionee’s refusal to consent or withdrawal of consent, the Optionee understands that he or she may contact his or her local human resources representative. 

13. Governing Law; Venue. This Stock Option grant and the provisions of this Agreement are governed by, and subject to, the laws of the
State of Delaware, without regard to the conflict of law provisions. For purposes of any action, lawsuit or other proceedings brought to enforce this Agreement, relating to it, or arising from it, the parties hereby submit to and consent to the sole
and exclusive jurisdiction of the courts of San Francisco County, California, or the federal courts for the United States for the Northern District of California, and no other courts, including the courts where this grant is made and/or to be
performed. 
 14. Electronic Delivery and Acceptance. The Company may, in its sole discretion, decide to deliver any documents
related to current or future participation in the Plan by electronic means. The Optionee hereby consents to receive such documents by electronic delivery and agrees to participate in the Plan through an on-line or electronic system established and
maintained by the Company or a third party designated by the Company. 
 15. Severability. The provisions of this Agreement are
severable and if any one or more provisions are determined to be illegal or otherwise unenforceable, in whole or in part, the remaining provisions shall nevertheless be binding and enforceable. 

16. Insider Trading Restrictions/Market Abuse Laws. The Optionee acknowledges that, depending on the Optionee’s country of
residence, the Optionee may be subject to insider trading restrictions and/or market abuse laws, which may affect the Optionee’s ability to acquire or sell Option Shares or rights to Option Shares (e.g., the Option) under the Plan during
such times as the Optionee is considered to have “inside information” regarding the Company (as defined by the laws in the Optionee’s country). Any restrictions under these laws or regulations are separate from and in addition to any
restrictions that may be imposed under any applicable Company insider trading policy. The Optionee acknowledges that it is his or her responsibility to comply with any applicable restrictions, and the Optionee is advised to speak to his or her
personal advisor on this matter. 
 17. Imposition of Other Requirements. The Company reserves the right to impose other requirements
on the Optionee’s participation in the Plan, on this Stock Option and on any Option Shares purchased upon exercise of this Stock Option, to the extent the Company determines it is necessary or advisable for legal or administrative reasons, and
to require the Optionee to sign any additional agreements or undertakings that may be necessary to accomplish the foregoing. 

  
 8 

 18. Waiver. The Optionee acknowledges that a waiver by the Company of breach of any
provision of this Agreement shall not operate or be construed as a waiver of any other provision of this Agreement, or of any subsequent breach by the Optionee or any other Plan participant. 

19. Notices. Notices hereunder shall be mailed or delivered to the Company at its principal place of business and shall be mailed or
delivered to the Optionee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

 

			
	ZENDESK, INC.
		
	By:	 	  

		 	Title:

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned.
Electronic acceptance of this Agreement pursuant to the Company’s instructions to the Optionee (including through an online acceptance process) is acceptable. 
  

									
	Dated:	 	  
	 		 		 	  

		 		 		 		 	Optionee’s Signature
					
		 		 		 		 	Optionee’s name and address:
					
		 		 		 		 	  

					
		 		 		 		 	  

					
		 		 		 		 	  

  
 9 

 NON-QUALIFIED STOCK OPTION AGREEMENT 

FOR COMPANY EMPLOYEES 

UNDER THE ZENDESK, INC. 

2014 STOCK OPTION AND INCENTIVE PLAN 
  

									
	Name of Optionee:	 		 		 		 	
		 	  
	 	
				
	No. of Option Shares:	 		 		 	
		 	  
	 		 	
					
	Option Exercise Price per Share:	 	$	 		 		 	
		 		 	  
	 		 	
		 	[FMV on Grant Date]
					
	Grant Date:	 		 		 		 	
		 	  
	 		 	
					
	Expiration Date:	 		 		 		 	
		 	  
	 		 	

 Pursuant to the Zendesk, Inc. 2014 Stock Option and Incentive Plan as amended through the date hereof (the
“Plan”), Zendesk, Inc. (the “Company”) hereby grants to the Optionee named above an option (the “Stock Option”) to purchase on or prior to the Expiration Date specified above all or part of the number of shares of
Common Stock, par value $0.01 per share (the “Stock”) of the Company specified above at the Option Exercise Price per Share specified above subject to the terms and conditions set forth herein and in the Plan. This Stock Option is not
intended to be an “incentive stock option” under Section 422 of the Internal Revenue Code of 1986, as amended. 
 1.
Exercisability Schedule. No portion of this Stock Option may be exercised until such portion shall have become exercisable. Except as set forth below, and subject to the discretion of the Administrator (as defined in Section 2 of the
Plan) to accelerate the exercisability schedule hereunder, this Stock Option shall be exercisable with respect to the following number of Option Shares on the dates indicated so long as the Optionee remains an employee of the Company or a Subsidiary
on such dates: 
  

			
	 Incremental Number of Option Shares Exercisable
	  	Exercisability Date
		
	              (    %)
	  	            
	              (    %)
	  	
	              (    %)
	  	
	              (    %)
	  	
	              (    %)
	  	

 Once exercisable, this Stock Option shall continue to be exercisable at any time or times prior to the close
of business on the Expiration Date, subject to the provisions hereof and of the Plan. 

 2. Manner of Exercise. 

(a) The Optionee may exercise this Stock Option only in the following manner: from time to time on or prior to the Expiration Date of this
Stock Option, the Optionee may give written notice to the Administrator of his or her election to purchase some or all of the Option Shares purchasable at the time of such notice. This notice shall specify the number of Option Shares to be
purchased. 
 Payment of the purchase price for the Option Shares may be made by one or more of the following methods: (i) in cash, by
certified or bank check or other instrument acceptable to the Administrator; (ii) through the delivery (or attestation to the ownership) of shares of Stock that have been purchased by the Optionee on the open market or that are beneficially
owned by the Optionee and are not then subject to any restrictions under any Company plan and that otherwise satisfy any holding periods as may be required by the Administrator; (iii) by the Optionee delivering to the Company a properly
executed exercise notice together with irrevocable instructions to a broker to promptly deliver to the Company cash or a check payable and acceptable to the Company to pay the option purchase price, provided that in the event the Optionee chooses to
pay the option purchase price as so provided, the Optionee and the broker shall comply with such procedures and enter into such agreements of indemnity and other agreements as the Administrator shall prescribe as a condition of such payment
procedure; (iv) by a “net exercise” arrangement pursuant to which the Company will reduce the number of shares of Stock issuable upon exercise by the largest whole number of shares with a Fair Market Value that does not exceed the
aggregate exercise price; or (v) a combination of (i), (ii), (iii) and (iv) above. Payment instruments will be received subject to collection. 

The transfer to the Optionee on the records of the Company or of the transfer agent of the Option Shares will be contingent upon (i) the
Company’s receipt from the Optionee of the full purchase price for the Option Shares, as set forth above, (ii) the satisfaction of any obligations for Tax-Related Items (as defined below) due in connection with the Option; (iii) the
fulfillment of any other requirements contained herein or in the Plan or in any other agreement or provision of laws, and (iv) the receipt by the Company of any agreement, statement or other evidence that the Company may require to satisfy
itself that the issuance of Stock to be purchased pursuant to the exercise of Stock Options under the Plan and any subsequent resale of the shares of Stock will be in compliance with applicable laws and regulations. In the event the Optionee chooses
to pay the purchase price by previously-owned shares of Stock through the attestation method, the number of shares of Stock transferred to the Optionee upon the exercise of the Stock Option shall be net of the Shares attested to. 

(b) The shares of Stock purchased upon exercise of this Stock Option shall be transferred to the Optionee on the records of the Company or of
the transfer agent upon compliance to the satisfaction of the Administrator with all requirements under applicable laws or regulations in connection with such transfer and with the requirements hereof and of the Plan. The determination of the
Administrator as to such compliance shall be final and binding on the Optionee. The Optionee shall not be deemed to be the holder of, or to have any of the rights of a holder with respect to, any shares of Stock subject to this Stock Option unless
and until this Stock Option shall have been exercised pursuant to the terms hereof, the Company or the transfer agent shall have transferred the shares to the Optionee, and the Optionee’s name shall have been entered as the stockholder of
record on the books of the Company. Thereupon, the Optionee shall have full voting, dividend and other ownership rights with respect to such shares of Stock. 

  
 2 

 (c) The minimum number of shares with respect to which this Stock Option may be exercised at any
one time shall be 100 shares, unless the number of shares with respect to which this Stock Option is being exercised is the total number of shares subject to exercise under this Stock Option at the time. 

(d) Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be exercisable after the Expiration Date
hereof. 
 3. Termination of Employment. If the Optionee’s employment by the Company or a Subsidiary (as defined in the Plan) is
terminated, the period within which to exercise the Stock Option may be subject to earlier termination as set forth below. 
 (a)
Termination Due to Death. If the Optionee’s employment terminates by reason of the Optionee’s death, any portion of this Stock Option outstanding on such date, to the extent exercisable on the date of death, may thereafter be
exercised by the Optionee’s legal representative or legatee for a period of [12] months from the date of death or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of death shall
terminate immediately and be of no further force or effect. 
 (b) Termination Due to Disability. If the Optionee’s employment
terminates by reason of the Optionee’s disability (as determined by the Administrator), any portion of this Stock Option outstanding on such date, to the extent exercisable on the date of such termination, may thereafter be exercised by the
Optionee for a period of [12] months from the date of termination or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of termination shall terminate immediately and be of no further
force or effect. 
 (c) Termination for Cause. If the Optionee’s employment terminates for Cause, any portion of this Stock
Option outstanding on such date shall terminate immediately and be of no further force and effect. For purposes hereof, “Cause” shall mean, unless otherwise provided in an employment agreement between the Company and the Optionee, a
determination by the Administrator that the Optionee shall be dismissed as a result of (i) any material breach by the Optionee of any agreement between the Optionee and the Company or any Subsidiary; (ii) the conviction of, indictment for
or plea of nolo contendere by the Optionee to a felony or a crime involving moral turpitude; or (iii) any material misconduct or willful and deliberate non-performance (other than by reason of disability) by the Optionee of the Optionee’s
duties to the Company or any Subsidiary. 
 (d) Other Termination. If the Optionee’s employment terminates for any reason other
than the Optionee’s death, the Optionee’s disability or Cause, and unless otherwise determined by the Administrator, any portion of this Stock Option outstanding on such date may be exercised, to the extent exercisable on the date of
termination, for a period of three months from the date of termination or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of termination shall terminate immediately and be of no further
force or effect. 

  
 3 

 The Administrator’s determination of the reason for termination of the Optionee’s
employment shall be conclusive and binding on the Optionee and his or her representatives or legatees. 
 4. Incorporation of Plan.
Notwithstanding anything herein to the contrary, this Stock Option shall be subject to and governed by all the terms and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms
in this Agreement shall have the meaning specified in the Plan, unless a different meaning is specified herein. 
 5.
Transferability. This Agreement is personal to the Optionee, is non-assignable and is not transferable in any manner, by operation of law or otherwise, other than by will or the laws of descent and distribution. This Stock Option is
exercisable, during the Optionee’s lifetime, only by the Optionee, and thereafter, only by the Optionee’s legal representative or legatee. 

6. Responsibility for Taxes. The Optionee acknowledges that, regardless of any action taken by the Company or, if different, the
Subsidiary which employs the Optionee (the “Employer”), the ultimate liability for all Federal, state and other income tax, social insurance, payroll tax, fringe benefits tax, payment on account or other tax related items related to the
Optionee’s participation in the Plan and legally applicable to the Optionee (“Tax-Related Items”) is and remains the Optionee’s responsibility and may exceed the amount actually withheld by the Company or the Employer. The
Optionee further acknowledges that the Company and/or the Employer (i) make no representations or undertakings regarding the treatment of any Tax-Related Items in connection with any aspect of this Stock Option, including, but not limited to,
the grant, vesting or exercise of this Stock Option, the subsequent sale of Option Shares acquired pursuant to such exercise and the receipt of any dividends; and (ii) do not commit to and are under no obligation to structure the terms of the
grant or any aspect of this Stock Option to reduce or eliminate the Optionee’s liability for Tax-Related Items or achieve any particular tax result. Further, if the Optionee is subject to Tax-Related Items in more than one jurisdiction between
the Grant Date and the date of any relevant taxable or tax withholding event, as applicable, the Optionee acknowledges that the Company and/or the Employer (or former employer, as applicable) may be required to withhold or account for Tax-Related
Items in more than one jurisdiction. 
 (a) Prior to the relevant taxable or tax withholding event, as applicable, the Optionee agrees to
make adequate arrangements satisfactory to the Company and/or the Employer to satisfy all Tax-Related Items. In this regard, the Optionee authorizes the Company or its agent to satisfy the obligations with regard to all Tax-Related Items by one or a
combination of the following: 
 (i) withholding from the Optionee’s wages or other cash compensation paid to the
Optionee by the Company and/or the Employer; or 

  
 4 

 (ii) withholding from proceeds of the sale of Option Shares acquired upon
exercise of the Stock Option either through a voluntary sale or through a mandatory sale arranged by the Company (on the Optionee’s behalf pursuant to this authorization without further consent); or 

(iii) withholding in Option Shares to be issued upon exercise of the Option a number of shares of Stock with an aggregate Fair
Market Value that would satisfy the minimum withholding amount due; or 
 (iv) by any other method deemed by the Company to
comply with applicable laws. 
 (b) Depending on the withholding method and subject to the foregoing, the Company may withhold or account
for Tax-Related Items by considering applicable minimum statutory withholding amounts or other applicable withholding rates, including maximum applicable rates, in which case the Optionee will receive a refund of any over-withheld amount in cash and
will have no entitlement to the equivalent in shares. If the obligation for Tax-Related Items is satisfied by withholding in Option Shares, for tax purposes, the Optionee is deemed to have been issued the full number of Option Shares subject to the
exercised Stock Option, notwithstanding that a number of the Option Shares are held back solely for the purpose of paying the Tax-Related Items. 

(c) Finally, the Optionee agrees to pay to the Company or the Employer any amount of Tax-Related Items that the Company or the Employer may be
required to withhold or account for as a result of the Optionee’s participation in the Plan that cannot be satisfied by the means previously described. The Company may refuse to issue or deliver the Option Shares or the proceeds of the sale of
Option Shares if the Optionee fails to comply with his or her obligations in connection with the Tax-Related Items. 
 7. No Obligation
to Continue Employment. Neither the Company nor any Subsidiary is obligated by or as a result of the Plan or this Agreement to continue the Optionee in employment and neither the Plan nor this Agreement shall interfere in any way with the right
of the Company or any Subsidiary to terminate the employment of the Optionee at any time. 
 8. Integration. This Agreement
constitutes the entire agreement between the parties with respect to this Stock Option and supersedes all prior agreements and discussions between the parties concerning such subject matter. 

9. Nature of Grant. In accepting this Stock Option, the Optionee acknowledges, understands and agrees that: 

(a) the Plan is established voluntarily by the Company and it is discretionary in nature and it may be modified, amended, suspended or
terminated by the Company at any time, to the extent permitted by the Plan; 
 (b) the grant of this Stock Option is voluntary and
occasional and does not create any contractual or other right to receive future grants of stock options, or benefits in lieu of stock options, even if stock options have been granted in the past; 

  
 5 

 (c) all decisions with respect to future stock option or other grants, if any, will be at the
sole discretion of the Company; 
 (d) this Stock Option grant and the Optionee’s participation in the Plan shall not be interpreted as
forming an employment contract with the Company; 
 (e) the Optionee is voluntarily participating in the Plan; 

(f) this Stock Option and any Option Shares acquired under the Plan are not intended to replace any pension rights or compensation; 

(g) this Stock Option and any Option Shares acquired under the Plan, and the income and value of same, are not part of normal or expected
compensation for any purpose, including, without limitation, calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses, long-service awards, pension or retirement benefits or payments or welfare
benefits or similar payments; 
 (h) the future value of this Option Shares underlying the Stock Option is unknown, indeterminable, and
cannot be predicted with certainty; 
 (i) if the underlying Option Shares do not increase in value, this Stock Option will have no value;

 (j) if the Optionee exercises this Stock Option and acquires Option Shares, the value of such Option Shares may increase or decrease in
value, even below the Option Exercise Price; 
 (k) no claim or entitlement to compensation or damages shall arise from forfeiture of this
Stock Option resulting from the termination of the Optionee’s employment relationship (for any reason whatsoever, whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Optionee is employed or the
terms of the Optionee’s employment agreement, if any), and in consideration of the grant of this Stock Option to which the Optionee is otherwise not entitled, the Optionee irrevocably agrees never to institute any claim against the Employer,
the Company or any of its Subsidiaries, waives his or her ability, if any, to bring any such claim, and releases the Employer, the Company and its Subsidiaries from any such claim; if, notwithstanding the foregoing, any such claim is allowed by a
court of competent jurisdiction, then, by participating in the Plan, the Optionee shall be deemed irrevocably to have agreed not to pursue such claim and agrees to execute any and all documents necessary to request dismissal or withdrawal of such
claim; and 
 (l) unless otherwise provided in the Plan or by the Company in its discretion, this Stock Option and the benefits evidenced by
this Agreement do not create any entitlement to have this Stock Option or any such benefits transferred to, or assumed by, another company nor to be exchanged, cashed out or substituted for, in connection with any corporate transaction affecting the
Stock. 
 10. No Advice Regarding Grant. The Company is not providing any tax, legal or financial advice, nor is the Company making
any recommendations regarding the Optionee’s 

  
 6 

 
participation in the Plan, or the Optionee’s acquisition or sale of the underlying Option Shares. The Optionee is hereby advised to consult with his or her own personal tax, legal and
financial advisors regarding his or her participation in the Plan before taking any action related to the Plan. 
 11. Data
Privacy. The Optionee hereby explicitly and unambiguously consents to the collection, use and transfer, in electronic or other form, of the Optionee’s personal data as described in this Agreement and any other Stock Option grant materials
by and among, as applicable, the Employer, Company and any Subsidiary for the exclusive purpose of implementing, administering and managing the Optionee’s participation in the Plan.  

The Optionee understands that the Employer, the Company and its Subsidiaries may hold certain personal information about the Optionee,
including, but not limited to, the Optionee’s name, home address and telephone number, date of birth, social insurance number or other identification number, salary, nationality, job title, any shares of stock or directorships held in the
Company, details of all stock options or any other entitlement to shares of stock awarded, canceled, exercised, vested, unvested or outstanding in the Optionee’s favor (“Data”), for the exclusive purpose of implementing, administering
and managing the Plan. 
 The Optionee understands that Data will be transferred to the stock plan service provider selected
by the Company, which is assisting the Company with the implementation, administration and management of the Plan. The Optionee understands that the recipients of the Data may be located in the United States or elsewhere, and that the
recipient’s country (e.g., the United States) may have different data privacy laws and protections than the Optionee’s country. The Optionee understands that he or she may request a list with the names and addresses of any potential
recipients of the Data by contacting his or her local human resources representative. The Optionee authorizes the Company, the stock plan service provider and any other possible recipients which may assist the Company (presently or in the future)
with implementing, administering and managing the Plan to receive, possess, use, retain and transfer the Data, in electronic or other form, for the sole purposes of implementing, administering and managing the Optionee’s participation in the
Plan. The Optionee understands that Data will be held only as long as is necessary to implement, administer and manage the Optionee’s participation in the Plan. The Optionee understands that he or she may, at any time, view Data, request
additional information about the storage and processing of Data, require any necessary amendments to Data or refuse or withdraw the consents herein, in any case without cost, by contacting in writing his or her local human resources representative.
Further, the Optionee understands that he or she is providing the consents herein on a purely voluntary basis. If the Optionee does not consent, or if the Optionee later seeks to revoke his or her consent, his or her employment status or service and
career with the Company or any Subsidiary will not be adversely affected; the only adverse consequence of refusing or withdrawing consent is that the Company would not be able to grant the Optionee Stock Options or other equity awards or administer
or maintain such awards. Therefore, the Optionee understands that refusing or withdrawing his or her consent may affect the Optionee’s ability to participate in the Plan. For more information on the consequences of the Optionee’s refusal
to consent or withdrawal of consent, the Optionee understands that he or she may contact his or her local human resources representative. 

  
 7 

 12. Governing Law; Venue. This Stock Option grant and the provisions of this Agreement are
governed by, and subject to, the laws of the State of Delaware, without regard to the conflict of law provisions. For purposes of any action, lawsuit or other proceedings brought to enforce this Agreement, relating to it, or arising from it, the
parties hereby submit to and consent to the sole and exclusive jurisdiction of the courts of San Francisco County, California, or the federal courts for the United States for the Northern District of California, and no other courts, including the
courts where this grant is made and/or to be performed. 
 13. Electronic Delivery and Acceptance. The Company may, in its sole
discretion, decide to deliver any documents related to current or future participation in the Plan by electronic means. The Optionee hereby consents to receive such documents by electronic delivery and agrees to participate in the Plan through an
on-line or electronic system established and maintained by the Company or a third party designated by the Company. 
 14.
Severability. The provisions of this Agreement are severable and if any one or more provisions are determined to be illegal or otherwise unenforceable, in whole or in part, the remaining provisions shall nevertheless be binding and
enforceable. 
 15. Insider Trading Restrictions/Market Abuse Laws. The Optionee acknowledges that, depending on the Optionee’s
country of residence, the Optionee may be subject to insider trading restrictions and/or market abuse laws, which may affect the Optionee’s ability to acquire or sell Option Shares or rights to Option Shares (e.g., the Option) under the Plan
during such times as the Optionee is considered to have “inside information” regarding the Company (as defined by the laws in the Optionee’s country). Any restrictions under these laws or regulations are separate from and in addition
to any restrictions that may be imposed under any applicable Company insider trading policy. The Optionee acknowledges that it is his or her responsibility to comply with any applicable restrictions, and the Optionee is advised to speak to his or
her personal advisor on this matter. 
 16. Imposition of Other Requirements. The Company reserves the right to impose other
requirements on the Optionee’s participation in the Plan, on this Stock Option and on any Option Shares purchased upon exercise of this Stock Option, to the extent the Company determines it is necessary or advisable for legal or administrative
reasons, and to require the Optionee to sign any additional agreements or undertakings that may be necessary to accomplish the foregoing. 

17. Waiver. The Optionee acknowledges that a waiver by the Company of breach of any provision of this Agreement shall not operate or be
construed as a waiver of any other provision of this Agreement, or of any subsequent breach by the Optionee or any other Plan participant. 

18. Notices. Notices hereunder shall be mailed or delivered to the Company at its principal place of business and shall be mailed or
delivered to the Optionee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

  
 8 

 
			
	ZENDESK, INC.
		
	By:	 	  

		 	Title:

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned.
Electronic acceptance of this Agreement pursuant to the Company’s instructions to the Optionee (including through an online acceptance process) is acceptable. 
  

									
	Dated:	 	  
	 		 		 	  

		 		 		 		 	Optionee’s Signature
					
		 		 		 		 	Optionee’s name and address:
					
		 		 		 		 	  

					
		 		 		 		 	  

					
		 		 		 		 	  

  
 9 

 NON-QUALIFIED STOCK OPTION AGREEMENT 

FOR NON-EMPLOYEE DIRECTORS 

UNDER THE ZENDESK, INC. 

2014 STOCK OPTION AND INCENTIVE PLAN 
  

									
	Name of Optionee:	 		 		 		 	
		 	  
	 	
				
	No. of Option Shares:	 		 		 	
		 	  
	 		 	
					
	Option Exercise Price per Share:	 	$	 		 		 	
		 		 	  
	 		 	
		 	[FMV on Grant Date]
					
	Grant Date:	 		 		 		 	
		 	  
	 		 	
					
	Expiration Date:	 		 		 		 	
		 	  
	 		 	
		 	[No more than 10 years]

 Pursuant to the Zendesk, Inc. 2014 Stock Option and Incentive Plan as amended through the date hereof (the
“Plan”), Zendesk, Inc. (the “Company”) hereby grants to the Optionee named above, who is a Director of the Company but is not an employee of the Company, an option (the “Stock Option”) to purchase on or prior to the
Expiration Date specified above all or part of the number of shares of Common Stock, par value $0.01 per share (the “Stock”), of the Company specified above at the Option Exercise Price per Share specified above subject to the terms and
conditions set forth herein and in the Plan. This Stock Option is not intended to be an “incentive stock option” under Section 422 of the Internal Revenue Code of 1986, as amended. 

1. Exercisability Schedule. No portion of this Stock Option may be exercised until such portion shall have become exercisable. Except
as set forth below, and subject to the discretion of the Administrator (as defined in Section 2 of the Plan) to accelerate the exercisability schedule hereunder, this Stock Option shall be exercisable with respect to the following number of
Option Shares on the dates indicated so long as the Optionee remains in service as a member of the Board on such dates: 
  

			
	 Incremental Number of Option Shares Exercisable
	  	Exercisability Date
		
	              (    %)
	  	            
	              (    %)
	  	
	              (    %)
	  	
	              (    %)
	  	
	              (    %)
	  	

 Once exercisable, this Stock Option shall continue to be exercisable at any time or times prior
to the close of business on the Expiration Date, subject to the provisions hereof and of the Plan. 
 2. Manner of Exercise. 

(a) The Optionee may exercise this Stock Option only in the following manner: from time to time on or prior to the Expiration Date of this
Stock Option, the Optionee may give written notice to the Administrator of his or her election to purchase some or all of the Option Shares purchasable at the time of such notice. This notice shall specify the number of Option Shares to be
purchased. 
 Payment of the purchase price for the Option Shares may be made by one or more of the following methods: (i) in cash, by
certified or bank check or other instrument acceptable to the Administrator; (ii) through the delivery (or attestation to the ownership) of shares of Stock that have been purchased by the Optionee on the open market or that are beneficially
owned by the Optionee and are not then subject to any restrictions under any Company plan and that otherwise satisfy any holding periods as may be required by the Administrator; (iii) by the Optionee delivering to the Company a properly
executed exercise notice together with irrevocable instructions to a broker to promptly deliver to the Company cash or a check payable and acceptable to the Company to pay the option purchase price, provided that in the event the Optionee chooses to
pay the option purchase price as so provided, the Optionee and the broker shall comply with such procedures and enter into such agreements of indemnity and other agreements as the Administrator shall prescribe as a condition of such payment
procedure; (iv) by a “net exercise” arrangement pursuant to which the Company will reduce the number of shares of Stock issuable upon exercise by the largest whole number of shares with a Fair Market Value that does not exceed the
aggregate exercise price; or (v) a combination of (i), (ii), (iii) and (iv) above. Payment instruments will be received subject to collection. 

The transfer to the Optionee on the records of the Company or of the transfer agent of the Option Shares will be contingent upon (i) the
Company’s receipt from the Optionee of the full purchase price for the Option Shares, as set forth above, (ii) the satisfaction of any obligations for Tax-Related Items (as defined below) due in connection with the Option, (iii) the
fulfillment of any other requirements contained herein or in the Plan or in any other agreement or provision of laws, and (iv) the receipt by the Company of any agreement, statement or other evidence that the Company may require to satisfy
itself that the issuance of Stock to be purchased pursuant to the exercise of Stock Options under the Plan and any subsequent resale of the shares of Stock will be in compliance with applicable laws and regulations. In the event the Optionee chooses
to pay the purchase price by previously-owned shares of Stock through the attestation method, the number of shares of Stock transferred to the Optionee upon the exercise of the Stock Option shall be net of the Shares attested to. 

(b) The shares of Stock purchased upon exercise of this Stock Option shall be transferred to the Optionee on the records of the Company or of
the transfer agent upon compliance to the satisfaction of the Administrator with all requirements under applicable laws or regulations in connection with such transfer and with the requirements hereof and of the Plan. The determination of the
Administrator as to such compliance shall be final and binding on the 

  
 2 

 
Optionee. The Optionee shall not be deemed to be the holder of, or to have any of the rights of a holder with respect to, any shares of Stock subject to this Stock Option unless and until this
Stock Option shall have been exercised pursuant to the terms hereof, the Company or the transfer agent shall have transferred the shares to the Optionee, and the Optionee’s name shall have been entered as the stockholder of record on the books
of the Company. Thereupon, the Optionee shall have full voting, dividend and other ownership rights with respect to such shares of Stock. 

(c) The minimum number of shares with respect to which this Stock Option may be exercised at any one time shall be 100 shares, unless the
number of shares with respect to which this Stock Option is being exercised is the total number of shares subject to exercise under this Stock Option at the time. 

(d) Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be exercisable after the Expiration Date
hereof. 
 3. Termination as Director. If the Optionee ceases to be a Director of the Company, the period within which to exercise
the Stock Option may be subject to earlier termination as set forth below. 
 (a) Termination Due to Death. If the Optionee’s
service as a Director terminates by reason of the Optionee’s death, any portion of this Stock Option outstanding on such date, to the extent exercisable on the date of death, may thereafter be exercised by the Optionee’s legal
representative or legatee for a period of [12] months from the date of death or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of death shall terminate immediately and be of no
further force or effect. 
 (b) Other Termination. If the Optionee ceases to be a Director for any reason other than the
Optionee’s death, any portion of this Stock Option outstanding on such date may be exercised, to the extent exercisable on the date the Optionee ceased to be a Director, for a period of [six] months from the date the Optionee ceased to
be a Director or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date the Optionee ceases to be a Director shall terminate immediately and be of no further force or effect. 

4. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Stock Option shall be subject to and governed by all
the terms and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the meaning specified in the Plan, unless a different meaning is specified
herein. 
 5. Transferability. This Agreement is personal to the Optionee, is non-assignable and is not transferable in any manner,
by operation of law or otherwise, other than by will or the laws of descent and distribution. This Stock Option is exercisable, during the Optionee’s lifetime, only by the Optionee, and thereafter, only by the Optionee’s legal
representative or legatee. 
 6. No Obligation to Continue as a Director. Neither the Plan nor this Stock Option confers upon the
Optionee any rights with respect to continuance as a Director. 

  
 3 

 7. Responsibility for Taxes. The Grantee acknowledges that, regardless of any action taken
by the Company, the ultimate liability for all Federal, state and other income tax, social insurance, payroll tax, fringe benefits tax, payment on account or other tax related items related to the Grantee’s participation in the Plan and legally
applicable to the Grantee (“Tax-Related Items”) is and remains the Grantee’s responsibility and may exceed the amount (if any) actually withheld by the Company. To the extent that the Company is required to withhold any Tax-Related
Items, such withholding may be satisfied in accordance with the terms of the Plan. 
 8. Integration. This Agreement constitutes the
entire agreement between the parties with respect to this Stock Option and supersedes all prior agreements and discussions between the parties concerning such subject matter. 

9. Nature of Grant. In accepting this Stock Option, the Optionee acknowledges, understands and agrees that: 

(a) the Plan is established voluntarily by the Company and it is discretionary in nature and it may be modified, amended, suspended or
terminated by the Company at any time, to the extent permitted by the Plan; 
 (b) the grant of this Stock Option is voluntary and
occasional and does not create any contractual or other right to receive future grants of stock options, or benefits in lieu of stock options, even if stock options have been granted in the past; 

(c) all decisions with respect to future stock option or other grants, if any, will be at the sole discretion of the Company; 

(d) this Stock Option grant and the Optionee’s participation in the Plan shall not be interpreted as forming an employment or other
service contract with the Company; 
 (e) the Optionee is voluntarily participating in the Plan; 

(f) this Stock Option and any Option Shares acquired under the Plan are not intended to replace any pension rights or compensation; 

(g) this Stock Option and any Option Shares acquired under the Plan, and the income and value of same, are not part of normal or expected
compensation for any purpose, including, without limitation, calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses, long-service awards, pension or retirement benefits or payments or welfare
benefits or similar payments; 
 (h) the future value of this Option Shares underlying the Stock Option is unknown, indeterminable, and
cannot be predicted with certainty; 
 (i) if the underlying Option Shares do not increase in value, this Stock Option will have no value;

  
 4 

 (j) if the Optionee exercises this Stock Option and acquires Option Shares, the value of such
Option Shares may increase or decrease in value, even below the Option Exercise Price; 
 (k) no claim or entitlement to compensation or
damages shall arise from forfeiture of this Stock Option resulting from the termination of the Optionee’s employment or other service relationship (for any reason whatsoever, whether or not later found to be invalid or in breach of employment
laws in the jurisdiction where the Optionee provides services or the terms of the Optionee’s employment or service agreement, if any), and in consideration of the grant of this Stock Option to which the Optionee is otherwise not entitled, the
Optionee irrevocably agrees never to institute any claim against the Company or any of its Subsidiaries, waives his or her ability, if any, to bring any such claim, and releases the Company and its Subsidiaries from any such claim; if,
notwithstanding the foregoing, any such claim is allowed by a court of competent jurisdiction, then, by participating in the Plan, the Optionee shall be deemed irrevocably to have agreed not to pursue such claim and agrees to execute any and all
documents necessary to request dismissal or withdrawal of such claim; and 
 (l) unless otherwise provided in the Plan or by the Company in
its discretion, this Stock Option and the benefits evidenced by this Agreement do not create any entitlement to have this Stock Option or any such benefits transferred to, or assumed by, another company nor to be exchanged, cashed out or substituted
for, in connection with any corporate transaction affecting the Stock. 
 10. No Advice Regarding Grant. The Company is not providing
any tax, legal or financial advice, nor is the Company making any recommendations regarding the Optionee’s participation in the Plan, or the Optionee’s acquisition or sale of the underlying Option Shares. The Optionee is hereby advised to
consult with his or her own personal tax, legal and financial advisors regarding his or her participation in the Plan before taking any action related to the Plan. 

11. Data Privacy. The Optionee hereby explicitly and unambiguously consents to the collection, use and transfer, in
electronic or other form, of the Optionee’s personal data as described in this Agreement and any other Stock Option grant materials by and among, as applicable, the Company and any Subsidiary for the exclusive purpose of implementing,
administering and managing the Optionee’s participation in the Plan. 
 The Optionee understands that the Company and its
Subsidiaries may hold certain personal information about the Optionee, including, but not limited to, the Optionee’s name, home address and telephone number, date of birth, social insurance number or other identification number, salary,
nationality, job title, any shares of stock or directorships held in the Company, details of all stock options or any other entitlement to shares of stock awarded, canceled, exercised, vested, unvested or outstanding in the Optionee’s favor
(“Data”), for the exclusive purpose of implementing, administering and managing the Plan. 
 The Optionee
understands that Data will be transferred to the stock plan service provider selected by the Company, which is assisting the Company with the implementation, administration and management of the Plan. The Optionee understands that the recipients of
the Data may be located in the United States or elsewhere, and that the recipient’s country 

  
 5 

 
(e.g., the United States) may have different data privacy laws and protections than the Optionee’s country. The Optionee understands that he or she may request a list with the names and
addresses of any potential recipients of the Data by contacting his or her local human resources representative. The Optionee authorizes the Company, the stock plan service provider and any other possible recipients which may assist the Company
(presently or in the future) with implementing, administering and managing the Plan to receive, possess, use, retain and transfer the Data, in electronic or other form, for the sole purposes of implementing, administering and managing the
Optionee’s participation in the Plan. The Optionee understands that Data will be held only as long as is necessary to implement, administer and manage the Optionee’s participation in the Plan. The Optionee understands that he or she may,
at any time, view Data, request additional information about the storage and processing of Data, require any necessary amendments to Data or refuse or withdraw the consents herein, in any case without cost, by contacting in writing his or her local
human resources representative. Further, the Optionee understands that he or she is providing the consents herein on a purely voluntary basis. If the Optionee does not consent, or if the Optionee later seeks to revoke his or her consent, his or her
employment status or service and career with the Company or any Subsidiary will not be adversely affected; the only adverse consequence of refusing or withdrawing consent is that the Company would not be able to grant the Optionee Stock Options or
other equity awards or administer or maintain such awards. Therefore, the Optionee understands that refusing or withdrawing his or her consent may affect the Optionee’s ability to participate in the Plan. For more information on the
consequences of the Optionee’s refusal to consent or withdrawal of consent, the Optionee understands that he or she may contact his or her local human resources representative. 

12. Governing Law; Venue. This Stock Option grant and the provisions of this Agreement are governed by, and subject to, the laws of the
State of Delaware, without regard to the conflict of law provisions. For purposes of any action, lawsuit or other proceedings brought to enforce this Agreement, relating to it, or arising from it, the parties hereby submit to and consent to the sole
and exclusive jurisdiction of the courts of San Francisco County, California, or the federal courts for the United States for the Northern District of California, and no other courts, including the courts where this grant is made and/or to be
performed. 
 13. Electronic Delivery and Acceptance. The Company may, in its sole discretion, decide to deliver any documents
related to current or future participation in the Plan by electronic means. The Optionee hereby consents to receive such documents by electronic delivery and agrees to participate in the Plan through an on-line or electronic system established and
maintained by the Company or a third party designated by the Company. 
 14. Severability. The provisions of this Agreement are
severable and if any one or more provisions are determined to be illegal or otherwise unenforceable, in whole or in part, the remaining provisions shall nevertheless be binding and enforceable. 

15. Imposition of Other Requirements. The Company reserves the right to impose other requirements on the Optionee’s participation
in the Plan, on this Stock Option and on any Option Shares purchased upon exercise of this Stock Option, to the extent the Company determines it is necessary or advisable for legal or administrative reasons, and to require the Optionee to sign any
additional agreements or undertakings that may be necessary to accomplish the foregoing. 

  
 6 

 16. Waiver. The Optionee acknowledges that a waiver by the Company of breach of any
provision of this Agreement shall not operate or be construed as a waiver of any other provision of this Agreement, or of any subsequent breach by the Optionee or any other Plan participant. 

17. Notices. Notices hereunder shall be mailed or delivered to the Company at its principal place of business and shall be mailed or
delivered to the Optionee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

 

			
	ZENDESK, INC.
		
	By:	 	  

		 	Title:

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned.
Electronic acceptance of this Agreement pursuant to the Company’s instructions to the Optionee (including through an online acceptance process) is acceptable. 
  

							
	Dated:	 	  
	 		 	  

		 		 		 	Optionee’s Signature
				
		 		 		 	Optionee’s name and address:
				
		 		 		 	  

				
		 		 		 	  

				
		 		 		 	  

  
 7 

 NON-QUALIFIED STOCK OPTION AGREEMENT 

FOR NON-U.S. OPTIONEES 

UNDER THE ZENDESK, INC. 

2014 STOCK OPTION AND INCENTIVE PLAN 
  

									
	Name of Optionee:	 		 		 	
		 	  
	 	
					
	No. of Option Shares:	 		 		 		 	
		 	  
	 		 	
					
	Option Exercise Price per Share:	 	$	 		 		 	
		 		 	  
	 		 	
		 	[FMV on Grant Date]
					
	Grant Date:	 		 		 		 	
		 	  
	 		 	
					
	Expiration Date:	 		 		 		 	
		 	  
	 		 	

 Pursuant to the Zendesk, Inc. 2014 Stock Option and Incentive Plan as amended through the date hereof (the
“Plan”), Zendesk, Inc. (the “Company”) hereby grants to the Optionee named above an option (the “Stock Option”) to purchase on or prior to the Expiration Date specified above all or part of the number of shares of
Common Stock, par value $0.01 per share (the “Stock”) of the Company specified above at the Option Exercise Price per Share specified above. This Stock Option shall be governed by and subject to the terms and conditions of the Plan and
this Non-Qualified Stock Option Agreement for Non-U.S. Optionees (the “Stock Option Agreement”), including any special terms and conditions for the Optionee’s country set forth in any appendix to this Stock Option Agreement (the
“Appendix”) (together with the Stock Option Agreement, the “Agreement”). 
 This Stock Option is not intended to be an
“incentive stock option” under Section 422 of the U.S. Internal Revenue Code of 1986, as amended. 
 1. Exercisability
Schedule. No portion of this Stock Option may be exercised until such portion shall have become exercisable. Except as set forth below, and subject to the discretion of the Administrator (as defined in Section 2 of the Plan) to accelerate
the exercisability schedule hereunder, this Stock Option shall be exercisable with respect to the following number of Option Shares on the dates indicated so long as Optionee remains an employee or other service provider with the Company or a
Subsidiary on such dates, as further described in Paragraph 3 of this Stock Option Agreement: 
  

			
	 Incremental Number of Option Shares Exercisable
	  	Exercisability Date
		
	             (    %)
	  	            
	             (    %)
	  	
	             (    %)
	  	
	             (    %)
	  	
	             (    %)
	  	

 Once exercisable, this Stock Option shall continue to be exercisable at any time or times prior
to the close of business on the Expiration Date, subject to the provisions of the Agreement and of the Plan. 
 2. Manner of
Exercise. 
 (a) The Optionee may exercise this Stock Option only in the following manner: from time to time on or prior to the
Expiration Date of this Stock Option, the Optionee may give written notice to the Administrator of his or her election to purchase some or all of the Option Shares purchasable at the time of such notice. This notice shall specify the number of
Option Shares to be purchased. 
 Payment of the purchase price for the Option Shares may be made by one or more of the following methods:
(i) in cash, by certified or bank check or other instrument acceptable to the Administrator; (ii) by the Optionee delivering to the Company a properly executed exercise notice together with irrevocable instructions to a broker to promptly
deliver to the Company cash or a check payable and acceptable to the Company to pay the option purchase price, provided that in the event the Optionee chooses to pay the option purchase price as so provided, the Optionee and the broker shall comply
with such procedures and enter into such agreements of indemnity and other agreements as the Administrator shall prescribe as a condition of such payment procedure; (iii) if permitted by the Administrator, by a “net exercise”
arrangement pursuant to which the Company will reduce the number of shares of Stock issuable upon exercise by the largest whole number of shares with a Fair Market Value that does not exceed the aggregate exercise price; or (iv) a combination
of (i), (ii) and (iii) above. Payment instruments will be received subject to collection. 
 The transfer to the Optionee on the
records of the Company or of the transfer agent of the Option Shares will be contingent upon (i) the Company’s receipt from the Optionee of the full purchase price in the Agreement for the Option Shares, as set forth above, (ii) the
satisfaction of any obligations for Tax-Related Items (as defined in Paragraph 6 below) due in connection with the Option, (iii) the fulfillment of any other requirements contained in the Agreement or in the Plan or in any other agreement or
provision of laws, and (iii) the receipt by the Company of any agreement, statement or other evidence that the Company may require to satisfy itself that the issuance of Stock to be purchased pursuant to the exercise of Stock Options under the
Plan and any subsequent resale of the shares of Stock will be in compliance with applicable laws and regulations. 

  
 2 

 (b) The shares of Stock purchased upon exercise of this Stock Option shall be transferred to the
Optionee on the records of the Company or of the transfer agent upon compliance to the satisfaction of the Administrator with all requirements under applicable laws or regulations in connection with such transfer and with the requirements of the
Agreement and of the Plan. The determination of the Administrator as to such compliance shall be final and binding on the Optionee. The Optionee shall not be deemed to be the holder of, or to have any of the rights of a holder with respect to, any
shares of Stock subject to this Stock Option unless and until this Stock Option shall have been exercised pursuant to the terms hereof, the Company or the transfer agent shall have transferred the shares to the Optionee, and the Optionee’s name
shall have been entered as the stockholder of record on the books of the Company. Thereupon, the Optionee shall have full voting, dividend and other ownership rights with respect to such shares of Stock. 

(c) The minimum number of shares with respect to which this Stock Option may be exercised at any one time shall be 100 shares, unless the
number of shares with respect to which this Stock Option is being exercised is the total number of shares subject to exercise under this Stock Option at the time. 

(d) Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be exercisable after the Expiration Date
hereof. 
 3. Termination of Service Relationship. If the Optionee’s service relationship by the Company or its Subsidiaries is
terminated, the period within which to exercise the Stock Option may be subject to earlier termination as set forth below. For purposes of this Stock Option, the Optionee’s service relationship will be considered terminated as of the date the
Optionee is no longer actively providing services to the Company or any Subsidiary (regardless of the reason for such termination and whether or not later found to be invalid or in breach of labor laws in the jurisdiction where the Optionee is
providing services or the terms of the Optionee’s service agreement, if any). Unless otherwise determined by the Company, (i) the Optionee’s right to vest in this Stock Option under the Plan, if any, will terminate as of such date and
will not be extended by any notice period (e.g., the Optionee’s period of service would not include any contractual notice period or any period of “garden leave” or similar period mandated under employment laws in the
jurisdiction where the Optionee is a service provider or the terms of the Optionee’s service agreement, if any); and (ii) the period (if any) during which the Optionee may exercise this Stock Option after such termination will commence on
the date the Optionee ceases to actively provide services and will not be extended by any notice period mandated under labor laws in the jurisdiction where the Optionee is providing services. The Administrator shall have the exclusive discretion to
determine when the Optionee is no longer actively providing services for purposes of his or her Stock Option grant (including whether the Optionee may still be considered to be providing services while on a leave of absence). 

(a) Termination Due to Death. If the Optionee’s service relationship terminates by reason of the Optionee’s death, any
portion of this Stock Option outstanding on such date, to the extent exercisable on the date of death, may thereafter be exercised by the Optionee’s legal representative or legatee, for a period of [12] months from the date of death or until
the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of death shall terminate immediately and be of no further force or effect. 

  
 3 

 (b) Termination Due to Disability. If the Optionee’s service relationship terminates
by reason of the Optionee’s disability (as determined by the Administrator), any portion of this Stock Option outstanding on such date, to the extent exercisable on the date of such termination, may thereafter be exercised by the Optionee for a
period of [12] months from the date of termination or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of termination shall terminate immediately and be of no further force or effect. 

(c) Termination for Cause. If the Optionee’s service relationship terminates for Cause, any portion of this Stock Option
outstanding on such date shall terminate immediately and be of no further force and effect. For purposes hereof, “Cause” shall mean a determination by the Administrator that the Optionee shall be dismissed as a result of (i) any
material breach by the Optionee of any agreement between the Optionee and the Company or any Subsidiary; (ii) the conviction of, indictment for or plea of nolo contendere by the Optionee to a felony or a crime involving moral turpitude; or
(iii) any material misconduct or willful and deliberate non-performance (other than by reason of disability) by the Optionee of the Optionee’s duties to the Company or any Subsidiary. 

(d) Other Termination. If the Optionee’s service relationship terminates for any reason other than the Optionee’s death, the
Optionee’s disability or Cause, and unless otherwise determined by the Administrator, any portion of this Stock Option outstanding on such date may be exercised, to the extent exercisable on the date of termination, for a period of three months
from the date of termination or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of termination shall terminate immediately and be of no further force or effect. 

The Administrator’s determination of the reason for termination of the Optionee’s service relationship shall be conclusive and
binding on the Optionee and his or her representatives or legatees. 
 4. Incorporation of Plan. Notwithstanding anything herein to
the contrary, this Stock Option shall be subject to and governed by all the terms and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the
meaning specified in the Plan, unless a different meaning is specified herein. 
 5. Transferability. This Agreement is personal to
the Optionee, is non-assignable and is not transferable in any manner, by operation of law or otherwise, other than by will or the laws of descent and distribution. This Stock Option is exercisable, during the Optionee’s lifetime, only by the
Optionee, and thereafter, only by the Optionee’s legal representative or legatee. 
 6. Responsibility for Taxes. The Optionee
acknowledges that, regardless of any action taken by the Company or, if different, any Subsidiary for which the Optionee renders services (the “Service Recipient”), the ultimate liability for all income tax, social insurance, payroll tax,
fringe benefits tax, payment on account or other tax-related items related to the Optionee’s participation in the Plan and legally applicable to the Optionee (“Tax-Related Items”) 

  
 4 

 
is and remains the Optionee’s responsibility and may exceed the amount actually withheld by the Company or the Service Recipient. The Optionee further acknowledges that the Company and/or
the Service Recipient (i) make no representations or undertakings regarding the treatment of any Tax-Related Items in connection with any aspect of this Stock Option, including, but not limited to, the grant, vesting or exercise of this Stock
Option, the subsequent sale of Option Shares acquired pursuant to such exercise and the receipt of any dividends; and (ii) do not commit to and are under no obligation to structure the terms of the grant or any aspect of this Stock Option to
reduce or eliminate the Optionee’s liability for Tax-Related Items or achieve any particular tax result. Further, if the Optionee is subject to Tax-Related Items in more than one jurisdiction between the Grant Date and the date of any relevant
taxable or tax withholding event, as applicable, the Optionee acknowledges that the Company and/or the Service Recipient (or former service recipient, as applicable) may be required to withhold or account for Tax-Related Items in more than one
jurisdiction. 
 Prior to the relevant taxable or tax withholding event, as applicable, the Optionee agrees to make adequate arrangements satisfactory to
the Company and/or the Service Recipient to satisfy all Tax-Related Items. In this regard, the Optionee authorizes the Company and/or the Service Recipient, or their respective agents, at their discretion, to satisfy the obligations with regard to
all Tax-Related Items by one or a combination of the following: 
  

	 	(a)	withholding from the Optionee’s wages or other cash compensation paid to the Optionee by the Company and/or the Service Recipient; or 

 

	 	(b)	withholding from proceeds of the sale of Option Shares acquired upon exercise of the Stock Option either through a voluntary sale or through a mandatory sale arranged by the Company (on the Optionee’s behalf
pursuant to this authorization without further consent); or 

  

	 	(c)	withholding in Option Shares to be issued upon exercise of the Option; or 

  

	 	(d)	by any other method deemed by the Company to comply with applicable laws. 

 Depending on the
withholding method, the Company may withhold or account for Tax-Related Items by considering applicable minimum statutory withholding amounts or other applicable withholding rates, including maximum applicable rates, in which case the Optionee will
receive a refund of any over-withheld amount in cash and will have no entitlement to the equivalent in shares. If the obligation for Tax-Related Items is satisfied by withholding in Option Shares, for tax purposes, the Optionee is deemed to have
been issued the full number of Option Shares subject to the exercised Stock Option, notwithstanding that a number of the Option Shares are held back solely for the purpose of paying the Tax-Related Items. 

Finally, the Optionee agrees to pay to the Company or the Service Recipient any amount of Tax-Related Items that the Company or the Service
Recipient may be required to withhold or account for as a result of the Optionee’s participation in the Plan that cannot be satisfied by the means previously described. The Company may refuse to issue or deliver the Option Shares or the
proceeds of the sale of Option Shares if the Optionee fails to comply with his or her obligations in connection with the Tax-Related Items. 

  
 5 

 7. No Obligation to Continue Service Relationship. Neither the Company nor any Subsidiary
is obligated by or as a result of the Plan or this Agreement to continue the Optionee’s service relationship and neither the Plan nor this Agreement shall interfere in any way with the right of the Company or any Subsidiary to terminate the
Optionee’s ervice relationship at any time. 
 8. Integration. This Agreement constitutes the entire agreement between the
parties with respect to this Stock Option and supersedes all prior agreements and discussions between the parties concerning such subject matter. 

9. Nature of Grant. In accepting this Stock Option, the Optionee acknowledges, understands and agrees that: 

(a) the Plan is established voluntarily by the Company and it is discretionary in nature and it may be modified, amended, suspended or
terminated by the Company at any time, to the extent permitted by the Plan; 
 (b) the grant of this Stock Option is voluntary and
occasional and does not create any contractual or other right to receive future grants of stock options, or benefits in lieu of stock options, even if stock options have been granted in the past; 

(c) all decisions with respect to future stock option or other grants, if any, will be at the sole discretion of the Company; 

(d) this Stock Option grant and the Optionee’s participation in the Plan shall not be interpreted as forming a service contract with the
Company; 
 (e) the Optionee is voluntarily participating in the Plan; 

(f) this Stock Option and any Option Shares acquired under the Plan are not intended to replace any pension rights or compensation; 

(g) this Stock Option and any Option Shares acquired under the Plan, and the income and value of same, are not part of normal or expected
compensation for any purpose, including, without limitation, calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses, long-service awards, pension or retirement benefits or payments or welfare
benefits or similar payments; 
 (h) the future value of this Option Shares underlying the Stock Option is unknown, indeterminable, and
cannot be predicted with certainty; 
 (i) if the underlying Option Shares do not increase in value, this Stock Option will have no value;

  
 6 

 (j) if the Optionee exercises this Stock Option and acquires Option Shares, the value of such
Option Shares may increase or decrease in value, even below the Option Exercise Price; 
 (k) no claim or entitlement to compensation or
damages shall arise from forfeiture of this Stock Option resulting from the termination of the Optionee’s service relationship (for any reason whatsoever, whether or not later found to be invalid or in breach of employment laws in the
jurisdiction where the Optionee is providing services or the terms of the Optionee’s service agreement, if any), and in consideration of the grant of this Stock Option to which the Optionee is otherwise not entitled, the Optionee irrevocably
agrees never to institute any claim against the Company, the Service Recipient or any other Subsidiary, waives his or her ability, if any, to bring any such claim, and releases the Company, the Service Recipient and any other Subsidiary from any
such claim; if, notwithstanding the foregoing, any such claim is allowed by a court of competent jurisdiction, then, by participating in the Plan, the Optionee shall be deemed irrevocably to have agreed not to pursue such claim and agrees to execute
any and all documents necessary to request dismissal or withdrawal of such claim; 
 (l) unless otherwise provided in the Plan or by the
Company in its discretion, this Stock Option and the benefits evidenced by this Agreement do not create any entitlement to have this Stock Option or any such benefits transferred to, or assumed by, another company nor to be exchanged, cashed out or
substituted for, in connection with any corporate transaction affecting the Stock; and 
 (m) neither the Company, the Service Recipient nor
any other Subsidiary shall be liable for any foreign exchange rate fluctuation between the Optionee’s local currency and the United States Dollar that may affect the value of this Stock Option or of any amounts due to the Optionee pursuant to
the exercise of this Stock Option or the subsequent sale of any Option Shares acquired upon exercise. 
 10. No Advice Regarding
Grant. The Company is not providing any tax, legal or financial advice, nor is the Company making any recommendations regarding the Optionee’s participation in the Plan, or the Optionee’s acquisition or sale of the underlying Option
Shares. The Optionee is hereby advised to consult with his or her own personal tax, legal and financial advisors regarding his or her participation in the Plan before taking any action related to the Plan. 

11. Data Privacy. The Optionee hereby explicitly and unambiguously consents to the collection, use and transfer, in
electronic or other form, of the Optionee’s personal data as described in this Agreement and any other Stock Option grant materials by and among, as applicable, the Company, the Service Recipient and any other Subsidiary for the exclusive
purpose of implementing, administering and managing the Optionee’s participation in the Plan. 
 The Optionee understands
that the Company, the Service Recipient and any other Subsidiary may hold certain personal information about the Optionee, including, but not limited to, the Optionee’s name, home address and telephone number, date of birth, social insurance
number or other identification number, salary, nationality, job title, any shares of stock or directorships held in the Company, details of all stock options or any other 

  
 7 

 
entitlement to shares of stock awarded, canceled, exercised, vested, unvested or outstanding in the Optionee’s favor (“Data”), for the exclusive purpose of implementing,
administering and managing the Plan. 
 The Optionee understands that Data will be transferred to the stock plan service
provider selected by the Company, which is assisting the Company with the implementation, administration and management of the Plan. The Optionee understands that the recipients of the Data may be located in the United States or elsewhere, and that
the recipient’s country (e.g., the United States) may have different data privacy laws and protections than the Optionee’s country. The Optionee understands that he or she may request a list with the names and addresses of any potential
recipients of the Data by contacting his or her local human resources representative. The Optionee authorizes the Company, the stock plan service provider and any other possible recipients which may assist the Company (presently or in the future)
with implementing, administering and managing the Plan to receive, possess, use, retain and transfer the Data, in electronic or other form, for the sole purposes of implementing, administering and managing the Optionee’s participation in the
Plan. The Optionee understands that Data will be held only as long as is necessary to implement, administer and manage the Optionee’s participation in the Plan. The Optionee understands that he or she may, at any time, view Data, request
additional information about the storage and processing of Data, require any necessary amendments to Data or refuse or withdraw the consents herein, in any case without cost, by contacting in writing his or her local human resources representative.
Further, the Optionee understands that he or she is providing the consents herein on a purely voluntary basis. If the Optionee does not consent, or if the Optionee later seeks to revoke his or her consent, his or her service relationship with the
Company, the Service Recipient or any other Subsidiary will not be adversely affected; the only adverse consequence of refusing or withdrawing consent is that the Company would not be able to grant the Optionee Stock Options or other equity awards
or administer or maintain such awards. Therefore, the Optionee understands that refusing or withdrawing his or her consent may affect the Optionee’s ability to participate in the Plan. For more information on the consequences of the
Optionee’s refusal to consent or withdrawal of consent, the Optionee understands that he or she may contact his or her local human resources representative. 

12. Governing Law; Venue. This Stock Option grant and the provisions of this Agreement are governed by, and subject to, the laws of the
State of Delaware, without regard to the conflict of law provisions. For purposes of any action, lawsuit or other proceedings brought to enforce this Agreement, relating to it, or arising from it, the parties hereby submit to and consent to the sole
and exclusive jurisdiction of the courts of San Francisco County, California, or the federal courts for the United States for the Northern District of California, and no other courts, including the courts where this grant is made and/or to be
performed. 
 13. Electronic Delivery and Acceptance. The Company may, in its sole discretion, decide to deliver any documents
related to current or future participation in the Plan by electronic means. The Optionee hereby consents to receive such documents by electronic delivery and agrees to participate in the Plan through an on-line or electronic system established and
maintained by the Company or a third party designated by the Company. 

  
 8 

 14. Language. If the Optionee has received this Agreement, or any other document related
to this Stock Option and/or the Plan translated into a language other than English and if the meaning of the translated version is different than the English version, the English version will control. 

15. Severability. The provisions of this Agreement are severable and if any one or more provisions are determined to be illegal or
otherwise unenforceable, in whole or in part, the remaining provisions shall nevertheless be binding and enforceable. 
 16. Notices.
Notices hereunder shall be mailed or delivered to the Company at its principal place of business and shall be mailed or delivered to the Optionee at the address on file with the Company or, in either case, at such other address as one party may
subsequently furnish to the other party in writing. 
 17. Appendix. Notwithstanding any provisions in this Stock Option Agreement,
this Stock Option grant shall be subject to any special terms and conditions set forth in any Appendix to this Stock Option Agreement for the Optionee’s country. Moreover, if the Optionee relocates to one of the countries included in the
Appendix, the special terms and conditions for such country will apply to the Optionee, to the extent the Company determines that the application of such terms and conditions is necessary or advisable for legal or administrative reasons. The
Appendix constitutes part of this Stock Option Agreement. 
 18. Insider Trading Restrictions/Market Abuse Laws. The Optionee
acknowledges that, depending on the Optionee’s country of residence, the Optionee may be subject to insider trading restrictions and/or market abuse laws, which may affect the Optionee’s ability to acquire or sell Option Shares or rights
to Option Shares (e.g., the Option) under the Plan during such times as the Optionee is considered to have “inside information” regarding the Company (as defined by the laws in the Optionee’s country). Any restrictions under
these laws or regulations are separate from and in addition to any restrictions that may be imposed under any applicable Company insider trading policy. The Optionee acknowledges that it is his or her responsibility to comply with any applicable
restrictions, and the Optionee is advised to speak to his or her personal advisor on this matter. 
 19. Imposition of Other
Requirements. The Company reserves the right to impose other requirements on the Optionee’s participation in the Plan, on this Stock Option and on any Option Shares purchased upon exercise of this Stock Option, to the extent the Company
determines it is necessary or advisable for legal or administrative reasons, and to require the Optionee to sign any additional agreements or undertakings that may be necessary to accomplish the foregoing. 

20. Waiver. The Optionee acknowledges that a waiver by the Company of breach of any provision of this Agreement shall not operate or be
construed as a waiver of any other provision of this Agreement, or of any subsequent breach by the Optionee or any other Plan participant. 

  
 9 

 
			
	ZENDESK, INC.
		
	By:	 	  

		 	Title:

 The Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned. Electronic
acceptance of this Agreement pursuant to the Company’s instructions to the Optionee (including through an online acceptance process) is acceptable. 
  

							
	Dated:	 	  
	 		 	  

		 		 		 	Optionee’s Signature
				
		 		 		 	Optionee’s name and address:
				
		 		 		 	  

				
		 		 		 	  

				
		 		 		 	  

  
 10 

 APPENDIX 

TO THE 
 STOCK OPTION
AGREEMENT FOR NON-U.S. OPTIONEES 
 Terms and Conditions 

This Appendix includes additional terms and conditions that govern this Stock Option if the Optionee works and/or resides in one of the countries listed below.
If the Optionee is a citizen or resident of a country other than the one in which the Optionee is currently working and/or residing (or is considered as such for local law purposes), or the Optionee transfers employment to a different country after
this Stock Option is granted, the Company will, in its discretion, determine the extent to which the terms and conditions contained herein will apply to the Optionee. 

Notifications 
 This Appendix also includes
information regarding certain other issues of which the Optionee should be aware with respect to the Optionee’s participation in the Plan. The information is based on the securities, exchange control and other laws in effect in the respective
countries as of December 2013. Such laws are often complex and change frequently. As a result, the Company strongly recommends that the Optionee not rely on the information noted herein as the only source of information relating to the consequences
of participation in the Plan because the information may be out-of-date at the time the Optionee vests in or exercises this Stock Option or sells any Option Shares acquired at exercise. 

In addition, the information contained herein is general in nature and may not apply to the Optionee’s particular situation. As a result, the Company is
not in a position to assure the Optionee of any particular result. Accordingly, the Optionee is strongly advised to seek appropriate professional advice as to how the relevant laws in the Optionee’s country may apply to the Optionee’s
individual situation. 
 If the Optionee is a citizen or resident of a country other than the one in which the Optionee is currently working and/or residing
(or is considered as such for local law purposes), or if the Optionee transfers employment to a different country after this Stock Option is granted, the notifications contained in this Appendix may not be applicable to the Optionee in the same
manner. 
 Capitalized terms used but not defined in this Appendix shall have the same meanings assigned to them in the Plan and the Stock Option Agreement.

  
 11 

 AUSTRALIA 

Terms and Conditions 
 Exercisability
Schedule. The following provision supplements Paragraph 1 of the Stock Option Agreement: 
 The Optionee shall not be permitted to exercise this Stock
Option when the Fair Market Value per Option Share is equal to or less than the Option Exercise Price. If all or a portion of this Stock Option vests when the Fair Market Value per Option Share is equal to or less than the Option Exercise Price,
this Stock Option may only be exercised starting on the first U.S. business day following the day on which the Fair Market Value per Option Share exceeds the Option Exercise Price. If the first U.S. business day following the day on which the Fair
Market Value per Option Share exceeds the Option Exercise Price falls in closed trading window (determined under applicable law or pursuant to the Company’s insider trading policy, if any), this Stock Option may be exercised only on the first
U.S. business day following such closed trading window, provided the Fair Market Value per Option Share exceeds the Option Exercise Price on such day. 

Expiration Date. Notwithstanding the Expiration Date set forth in the Stock Option Agreement, this Stock Option shall expire on the day immediately
preceding the seventh (7th) anniversary of the Grant Date. 
 Notifications 

Securities Law Information. If the Optionee acquires Option Shares under the Plan and offers the Option Shares for sale to a person or entity resident
in Australia, the offer may be subject to disclosure requirements under Australian law. The Optionee should consult with his or her personal legal advisor before making any such offer in Australia. 

BRAZIL 
 Terms and Conditions 

Compliance with Law. The Optionee must comply with applicable Brazilian laws and is responsible for paying any and all applicable taxes associated with
the exercise of this Stock Option, the receipt of any dividends, and the sale of Option Shares acquired under the Plan. 
 Notifications 

Exchange Control Information. If the Optionee is resident or domiciled in Brazil, the Optionee will be required to submit an annual declaration of
assets and rights held outside of Brazil to the Central Bank of Brazil if the aggregate value of such assets and rights equals or exceeds US$100,000. Assets and rights that must be reported include any Option Shares acquired under the Plan. Foreign
individuals holding Brazilian visas are considered Brazilian residents for purposes of this reporting requirement and must declare at least the assets held abroad that were acquired subsequent to the date of admittance as a resident of Brazil. 

  
 12 

 FRANCE 

Terms and Conditions 
 Language Consent. By
accepting this Stock Option, the Optionee confirms having read and understood the documents relating to this Stock Option (the Plan and the Agreement) which were provided to the Optionee in English. The Optionee accepts the terms of those documents
accordingly. 
 Reconnaissance Relative à la Langue Utilisée. En acceptant le attribution, le Participant confirme avoir lu et
compris les documents relatifs à cette attribution (le Plan et ce Contrat) qui ont été communiqués au Participant en langue anglaise. Le Participant accepte les termes de ces documents en connaissance de cause. 

Notifications 
 Foreign Asset/Account Reporting
Information. If the Optionee maintains a foreign bank account, the Optionee is required to report such account to the French tax authorities on his or her annual tax return. 

GERMANY 
 Notifications 

Exchange Control Information. Cross-border payments in excess of €12,500 must be reported monthly to the German Federal Bank (Bundesbank).
In case of payments in connection with securities (including proceeds realized upon the sale of Option Shares or the receipt of any dividends), the report must be made by the 5th day of the month following the month in which the payment was
received. Effective from September 2013, the report must be filed electronically. The form of report (“Allgemeine Meldeportal Statistik”) can be accessed via the Bundesbank’s website (www.bundesbank.de) and is available in both
German and English. The Optionee is responsible for making this report. 
 IRELAND 

Notifications 
 Director Reporting
Obligation. If the Optionee is a director, shadow director or secretary of a Subsidiary in Ireland, the Optionee must notify the Irish Subsidiary in writing within five business days of receiving or disposing of an interest in the Company
(e.g., Stock Options, Option Shares), or within five business days of becoming aware of the event giving rise to the notification requirement or within five days of becoming a director or secretary if such an interest exists at the time. This
notification requirement also applies with respect to the interests of the Optionee’s spouse or children under the age of 18 (whose interests will be attributed to the Optionee if the Optionee is a director, shadow director or secretary). 

  
 13 

 JAPAN 

Notifications 
 Exchange Control Information.
If the Optionee pays more than ¥30,000,000 for the purchase of Option Shares in any one transaction, the Optionee must file an ex post facto Payment Report with the Ministry of Finance (through the Bank of Japan or the bank carrying out
the transaction). The precise reporting requirements vary depending on whether the relevant payment is made through a bank in Japan. If the Optionee acquires Option Shares with a value in excess of ¥100,000,000 in a single transaction, the
Optionee must also file an ex post facto Report Concerning Acquisition of Shares with the Ministry of Finance through the Bank of Japan within 20 days of acquiring the Option Shares. The forms to make these reports can be acquired at the Bank
of Japan. 
 A Payment Report is required independently of a Report Concerning Acquisition of Securities. Consequently, if the total amount that the
Optionee pays on a one-time basis at exercise of this Stock Option exceeds ¥100,000,000, the Optionee must file both a Payment Report and a Report Concerning Acquisition of Securities. 

Foreign Asset/Account Reporting Information. The Optionee is required to report details of any assets held outside of Japan as of December 31,
including Option Shares acquired under the Plan, to the extent such assets have a total net fair market value exceeding ¥50,000,000. Such report will be due by March 15 each year. The Optionee is responsible for complying with this
reporting obligation and is advised to consult his or her personal tax advisor in this regard. 
 PHILIPPINES 

Notifications 
 Securities Law Information.
The Optionee acknowledges that he or she is permitted to sell Option Shares acquired under the Plan through the designated Plan broker appointed by the Company (or such other broker to whom the Optionee transfers his or her Option Shares), provided
that such sale takes place outside of the Philippines through the facilities of the [insert stock market on which shares will be listed] on which the Option Shares are listed. 

SINGAPORE 
 Notifications 

Securities Law Information. The grant of the Stock Options is being made pursuant to the “Qualifying Person” exemption” under section
273(1)(f) of the Securities and Futures Act (Chapter 289, 2006 Ed.) (“SFA”). The Plan has not been lodged or registered as a prospectus with the Monetary Authority of Singapore. The Optionee should note that the Stock Options are subject
to section 257 of the SFA and the Optionee will not be able to make (i) any subsequent sale of the Option Shares in Singapore or (ii) any offer of such subsequent sale of the Option Shares subject to the Stock Options in Singapore, unless
such sale or offer in is made pursuant to 

  
 14 

 
the exemptions under Part XIII Division 1 Subdivision (4) (other than section 280) of the SFA. The Option Shares are currently traded on the [insert stock exchange on which shares will be
listed], which is located outside of Singapore, under the ticker symbol “[insert]” and Option Shares acquired under the Plan may be sold through this exchange. 

Director Reporting Obligation. If the Optionee is a director, associate director or shadow director of a Singapore Subsidiary, he or she is subject to
certain notification requirements under the Singapore Companies Act, regardless of whether he or she is a Singapore resident or employed in Singapore. Among these requirements is the obligation to notify the Singapore Subsidiary in writing when the
Optionee receives or disposes of an interest (e.g., Stock Options, Option Shares) in the Company or a Subsidiary. These notifications must be made within two business days of acquiring or disposing of any interest in the Company or any
Subsidiary or within two business days of becoming a director, associate director or shadow director if such an interest exists at that time. 
 UNITED
KINGDOM 
 Terms and Conditions 

Responsibility for Taxes. The following provisions supplement Paragraph 6 of the Stock Option Agreement: 

If payment or withholding of income tax is not made within ninety (90) days of the event giving rise to the Tax-Related Items or such other period
specified in Section 222(1)(c) of the U.K. Income Tax (Earnings and Pensions) Act 2003 (the “Due Date”), the amount of any uncollected income tax will constitute a loan owed by the Optionee to the Service Recipient, effective on the
Due Date. The loan will bear interest at the then-current official rate of Her Majesty’s Revenue and Customs (“HMRC”) and it will be immediately due and repayable by the Optionee, and the Company or the Service Recipient may recover
it at any time thereafter by any of the means referred to in Paragraph 6 of the Stock Option Agreement. 
 Notwithstanding the foregoing, if the Optionee is
a director or executive officer of the Company (within the meaning of Section 13(k) of the 1934 Act), the Optionee will not be eligible for such a loan to cover the unpaid income tax. In the event that the Optionee is such a director or
executive officer and the income tax is not collected from or paid by the Optionee by the Due Date, the amount of any uncollected taxes will constitute a benefit to the Optionee on which additional income tax and national insurance contributions
(“NICs”) will be payable. The Optionee will be responsible for reporting and paying any income tax due on this additional benefit directly to HMRC under the self-assessment regime and for paying to the Company or the Service Recipient, as
applicable, any employee NICs due on this additional benefit, which the Company or the Service Recipient may recover from the Optionee by any of the means referred to in Paragraph 6 of the Stock Option Agreement. 

Joint Election. As a condition of the Optionee’s participation in the Plan and the exercise of the Stock Option, the Optionee shall accept any
liability for secondary Class 1 NICs which may be payable by the Company and/or the Service Recipient in connection with the Stock Option and 

  
 15 

 
any event giving rise to Tax-Related Items (the “Employer’s Liability”). Without prejudice to the foregoing, the Optionee shall enter into a joint election with the Company or the
Service Recipient, the form of such joint election being formally approved by HMRC (the “Joint Election”), and any other required consent or elections, including any such other joint elections as may be required between the Optionee and
any successor to the Company and/or the Service Recipient. The Company and/or the Service Recipient may collect the Employer’s Liability from the Optionee by any of the means set forth in Paragraph 6 of the Stock Option Agreement. 

  
 16 

 RESTRICTED STOCK UNIT AWARD AGREEMENT 

FOR COMPANY EMPLOYEES 

UNDER THE ZENDESK, INC. 

2014 STOCK OPTION AND INCENTIVE PLAN 
  

							
	Name of Grantee:	 	  
	 	
				
	No. of Restricted Stock Units:	 	  
	 		 	
				
	Grant Date:	 	  
	 		 	

 Pursuant to the Zendesk, Inc. 2014 Stock Option and Incentive Plan as amended through the date hereof (the
“Plan”), Zendesk, Inc. (the “Company”) hereby grants an award of the number of Restricted Stock Units listed above (an “Award”) to the Grantee named above. Each Restricted Stock Unit shall relate to one share of Common
Stock, par value $0.01 per share (the “Stock”) of the Company. 
 1. Restrictions on Transfer of Award. This Award may not
be sold, transferred, pledged, assigned or otherwise encumbered or disposed of by the Grantee, and any shares of Stock issuable with respect to the Award may not be sold, transferred, pledged, assigned or otherwise encumbered or disposed of until
(i) the Restricted Stock Units have vested as provided in Paragraph 2 of this Agreement and (ii) shares of Stock have been issued to the Grantee in accordance with the terms of the Plan and this Agreement. 

2. Vesting of Restricted Stock Units. The restrictions and conditions of Paragraph 1 of this Agreement shall lapse on the Vesting Date
or Dates specified in the following schedule so long as the Grantee remains an employee of the Company or a Subsidiary on such Dates. If a series of Vesting Dates is specified, then the restrictions and conditions in Paragraph 1 shall lapse only
with respect to the number of Restricted Stock Units specified as vested on such date. 
  

			
	 Incremental Number of Restricted Stock Units Vested
	  	Vesting Date
		
	              (    %)
	  	
	              (    %)
	  	
	              (    %)
	  	
	              (    %)
	  	

 The Administrator may at any time accelerate the vesting schedule specified in this Paragraph 2. 

3. Termination of Employment. If the Grantee’s employment with the Company and its Subsidiaries terminates for any reason
(including death or disability) prior to the satisfaction of the vesting conditions set forth in Paragraph 2 above, any Restricted Stock Units that have not vested as of such date shall automatically and without notice terminate and be forfeited,
and neither the Grantee nor any of his or her successors, heirs, assigns, or personal representatives will thereafter have any further rights or interests in such unvested Restricted Stock Units. 

 For purposes of the Award, the Grantee’s employment will be considered terminated as of the
date the Grantee is no longer actively providing services to the Company or any Subsidiary (regardless of the reason for such termination and whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the
Grantee is employed or the terms of the Grantee’s employment agreement, if any). Unless otherwise determined by the Company, the Grantee’s right to vest in the Restricted Stock Units under the Plan, if any, will terminate as of such date
and will not be extended by any notice period (e.g., the Grantee’s period of service would not include any contractual notice period or any period of “garden leave” or similar period mandated under employment laws in the jurisdiction
where the Grantee is employed or the terms of the Grantee’s employment agreement, if any). The Administrator shall have the exclusive discretion to determine when the Grantee is no longer actively providing services for purposes of his or her
Award (including whether the Grantee may still be considered to be providing services while on a leave of absence). 
 4. Issuance of
Shares of Stock. As soon as practicable following each Vesting Date (but in no event later than two and one-half months after the end of the year in which the Vesting Date occurs), the Company shall issue to the Grantee the number of shares of
Stock equal to the aggregate number of Restricted Stock Units that have vested pursuant to Paragraph 2 of this Agreement on such date and the Grantee shall thereafter have all the rights of a stockholder of the Company with respect to such shares.

 5. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Agreement shall be subject to and governed by all
the terms and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the meaning specified in the Plan, unless a different meaning is specified
herein. 
 6. Responsibility for Taxes. The Grantee acknowledges that, regardless of any action taken by the Company or, if
different, the Subsidiary which employs the Grantee (the “Employer”), the ultimate liability for all Federal, state and other income tax, social insurance, payroll tax, fringe benefits tax, payment on account or other tax related items
related to the Grantee’s participation in the Plan and legally applicable to the Grantee (“Tax-Related Items”) is and remains the Grantee’s responsibility and may exceed the amount actually withheld by the Company or the
Employer. The Grantee further acknowledges that the Company and/or the Employer (i) make no representations or undertakings regarding the treatment of any Tax-Related Items in connection with any aspect of the Restricted Stock Units, including,
but not limited to, the grant, vesting or settlement of the Restricted Stock Units, the subsequent sale of any shares of Stock acquired under the Plan and the receipt of any dividends or dividend equivalents; and (ii) do not commit to and are
under no obligation to structure the terms of the grant or any aspect of the Restricted Stock Units to reduce or eliminate the Grantee’s liability for Tax-Related Items or achieve any particular tax result. Further, if the Grantee is subject to
Tax-Related Items in more than one jurisdiction between the Grant Date and the date of any relevant taxable or tax withholding event, as applicable, the Grantee acknowledges that the Company and/or the Employer (or former employer, as applicable)
may be required to withhold or account for Tax-Related Items in more than one jurisdiction. 

  
 2 

 (a) Prior to the relevant taxable or tax withholding event, as applicable, the Grantee agrees to
make adequate arrangements satisfactory to the Company and/or the Employer to satisfy all Tax-Related Items. In this regard, the Grantee authorizes the Company and/or the Employer, or their respective agents, at their discretion, to satisfy their
withholding obligations, if any, with regard to all Tax-Related Items by one or a combination of the following: 
 (i)
withholding from the Grantee’s wages or other cash compensation paid to the Grantee by the Company and/or the Employer; or 

(ii) withholding from proceeds of the sale of shares of Stock acquired upon settlement of the Restricted Stock Units either
through a voluntary sale or through a mandatory sale arranged by the Company (on the Grantee’s behalf pursuant to this authorization without further consent); or 

(iii) withholding from shares of Stock to be issued upon settlement of the Restricted Stock Units a number of shares with an
aggregate Fair Market Value that would satisfy the required minimum withholding amount due; or 
 (iv) by any other method
deemed by the Company to comply with applicable laws. 
 (b) Depending on the withholding method and subject to the foregoing, the Company
may withhold or account for Tax-Related Items by considering applicable minimum statutory withholding amounts or other applicable withholding rates, including maximum applicable rates, in which case the Grantee will receive a refund of any
over-withheld amount in cash and will have no entitlement to the equivalent in shares. If the obligation for Tax-Related Items is satisfied by withholding in shares of Stock, for tax purposes, the Grantee is deemed to have been issued the full
number of shares subject to the vested Restricted Stock Units, notwithstanding that a number of the shares are held back solely for the purpose of paying the Tax-Related Items. 

(c) Finally, the Grantee agrees to pay to the Company or the Employer any amount of Tax-Related Items that the Company or the Employer may be
required to withhold or account for as a result of the Grantee’s participation in the Plan that cannot be satisfied by the means previously described. The Company may refuse to issue or deliver the shares or the proceeds of the sale of shares
of Stock if the Grantee fails to comply with his or her obligations in connection with the Tax-Related Items. 
 7. Section 409A of
the Code. This Agreement shall be interpreted in such a manner that all provisions relating to the settlement of the Award are exempt from the requirements of Section 409A of the Code as “short-term deferrals” as described in
Section 409A of the Code. 
 8. No Obligation to Continue Employment. Neither the Company nor any Subsidiary is obligated by or
as a result of the Plan or this Agreement to continue the Grantee in employment and neither the Plan nor this Agreement shall interfere in any way with the right of the Company or any Subsidiary to terminate the employment of the Grantee at any
time. 

  
 3 

 9. Integration. This Agreement constitutes the entire agreement between the parties with
respect to this Award and supersedes all prior agreements and discussions between the parties concerning such subject matter. 
 10.
Nature of Grant. In accepting the Award, the Grantee acknowledges, understands and agrees that: 
 (a) the Plan is established
voluntarily by the Company, it is discretionary in nature and it may be modified, amended, suspended or terminated by the Company at any time, to the extent permitted by the Plan; 

(b) the grant of the Restricted Stock Units is voluntary and occasional and does not create any contractual or other right to receive future
grants of restricted stock units, or benefits in lieu of restricted stock units, even if restricted stock units have been granted in the past; 

(c) all decisions with respect to future restricted stock units or other grants, if any, will be at the sole discretion of the Company; 

(d) the Award and the Grantee’s participation in the Plan shall not be interpreted as forming an employment contract with the Company;

 (e) the Grantee is voluntarily participating in the Plan; 

(f) the Award and any shares of Stock acquired under the Plan are not intended to replace any pension rights or compensation; 

(g) the Award and any shares of Stock acquired under the Plan, and the income and value of same, are not part of normal or expected
compensation for any purpose, including, without limitation, calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses, long-service awards, pension or retirement benefits or payments or welfare
benefits or similar payments; 
 (h) the future value of the shares of Stock underlying the Award is unknown, indeterminable, and cannot be
predicted with certainty; 
 (i) no claim or entitlement to compensation or damages shall arise from forfeiture of the Award resulting from
the termination of the Grantee’s employment relationship (for any reason whatsoever, whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Grantee is employed or the terms of the Grantee’s
employment agreement, if any), and in consideration of the grant of the Restricted Stock Units to which the Grantee is otherwise not entitled, the Grantee irrevocably agrees never to institute any claim against the Employer, the Company or any of
its Subsidiaries, waives his or her ability, if any, to bring any such claim, and releases the Employer, the Company and its Subsidiaries from any such claim; if, notwithstanding the foregoing, any such claim is allowed by a court of competent
jurisdiction, then, by participating in the Plan, the Grantee shall be deemed irrevocably to have agreed not to pursue such claim and agrees to execute any and all documents necessary to request dismissal or withdrawal of such claim; and 

(j) unless otherwise provided in the Plan or by the Company in its discretion, the Award and the benefits evidenced by this Agreement do not
create any entitlement to have the Restricted Stock Units or any such benefits transferred to, or assumed by, another company nor to be exchanged, cashed out or substituted for, in connection with any corporate transaction affecting the Stock. 

  
 4 

 11. No Advice Regarding Grant. The Company is not providing any tax, legal or financial
advice, nor is the Company making any recommendations regarding the Grantee’s participation in the Plan, or the Grantee’s acquisition or sale of the underlying shares of Stock. The Grantee is hereby advised to consult with his or her own
personal tax, legal and financial advisors regarding his or her participation in the Plan before taking any action related to the Plan. 

12. Data Privacy. The Grantee hereby explicitly and unambiguously consents to the collection, use and transfer, in
electronic or other form, of the Grantee’s personal data as described in this Agreement and any other Award grant materials by and among, as applicable, the Employer, the Company and any Subsidiary for the exclusive purpose of implementing,
administering and managing the Grantee’s participation in the Plan. 
 The Grantee understands that the Employer, the
Company and its Subsidiaries may hold certain personal information about the Grantee, including, but not limited to, the Grantee’s name, home address and telephone number, date of birth, social insurance number or other identification number,
salary, nationality, job title, any shares of stock or directorships held in the Company, details of all awards or any other entitlement to shares of Stock awarded, canceled, exercised, vested, unvested or outstanding in the Grantee’s favor
(“Data”), for the exclusive purpose of implementing, administering and managing the Plan. 
 The Grantee understands
that Data will be transferred to the stock plan service provider selected by the Company, which is assisting the Company with the implementation, administration and management of the Plan. The Grantee understands that the recipients of the Data may
be located in the United States or elsewhere, and that the recipient’s country (e.g., the United States) may have different data privacy laws and protections than the Grantee’s country. The Grantee understands that he or she may request a
list with the names and addresses of any potential recipients of the Data by contacting his or her local human resources representative. The Grantee authorizes the Company, the stock plan service provider and any other possible recipients which may
assist the Company (presently or in the future) with implementing, administering and managing the Plan to receive, possess, use, retain and transfer the Data, in electronic or other form, for the sole purposes of implementing, administering and
managing the Grantee’s participation in the Plan. The Grantee understands that Data will be held only as long as is necessary to implement, administer and manage the Grantee’s participation in the Plan. The Grantee understands that he or
she may, at any time, view Data, request additional information about the storage and processing of Data, require any necessary amendments to Data or refuse or withdraw the consents herein, in any case without cost, by contacting in writing his or
her local human resources representative. Further, the Grantee understands that he or she is providing the consents herein on a purely voluntary basis. If the Grantee does not consent, or if the Grantee later seeks to revoke his or her consent, his
or her employment status or service and career with the Company or any Subsidiary will not be adversely affected; the only adverse consequence of refusing or withdrawing consent is that the Company would not be able to

  
 5 

 
grant the Grantee Restricted Stock Units or other equity awards or administer or maintain such awards. Therefore, the Grantee understands that refusing or withdrawing his or her consent may
affect the Grantee’s ability to participate in the Plan. For more information on the consequences of the Grantee’s refusal to consent or withdrawal of consent, the Grantee understands that he or she may contact his or her local human
resources representative. 
 13. Governing Law; Venue. The Award and the provisions of this Agreement are governed by, and
subject to, the laws of the State of Delaware, without regard to the conflict of law provisions. For purposes of any action, lawsuit or other proceedings brought to enforce this Agreement, relating to it, or arising from it, the parties hereby
submit to and consent to the sole and exclusive jurisdiction of the courts of San Francisco County, California, or the federal courts for the United States for the Northern District of California, and no other courts, including any courts where this
grant is made and/or to be performed. 
 14. Electronic Delivery and Acceptance. The Company may, in its sole discretion, decide to
deliver any documents related to current or future participation in the Plan by electronic means. The Grantee hereby consents to receive such documents by electronic delivery and agrees to participate in the Plan through an on-line or electronic
system established and maintained by the Company or a third party designated by the Company. 
 15. Severability. The provisions of
this Agreement are severable and if any one or more provisions are determined to be illegal or otherwise unenforceable, in whole or in part, the remaining provisions shall nevertheless be binding and enforceable. 

16. Notices. Notices hereunder shall be mailed or delivered to the Company at its principal place of business and shall be mailed or
delivered to the Grantee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

17. Insider Trading Restrictions/Market Abuse Laws. The Grantee acknowledges that, depending on the Grantee’s country of
residence, the Grantee may be subject to insider trading restrictions and/or market abuse laws, which may affect the Grantee’s ability to acquire or sell shares of Stock or rights to shares of Stock (e.g., Restricted Stock Units) under
the Plan during such times as the Grantee is considered to have “inside information” regarding the Company (as defined by the laws in the Grantee’s country). Any restrictions under these laws or regulations are separate from and in
addition to any restrictions that may be imposed under any applicable Company insider trading policy. The Grantee acknowledges that it is his or her responsibility to comply with any applicable restrictions, and the Grantee is advised to speak to
his or her personal advisor on this matter. 
 18. Imposition of Other Requirements. The Company reserves the right to impose other
requirements on the Grantee’s participation in the Plan, on the Award and on any shares of Stock issued upon settlement of the Award, to the extent the Company determines it is necessary or advisable for legal or administrative reasons, and to
require the Grantee to sign any additional agreements or undertakings that may be necessary to accomplish the foregoing. 
 19.
Waiver. The Grantee acknowledges that a waiver by the Company of breach of any provision of this Agreement shall not operate or be construed as a waiver of any other provision of this Agreement, or of any subsequent breach by the Grantee or
any other Plan participant. 

  
 6 

 
			
	ZENDESK, INC.
		
	By:	 	  

		 	Title:

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned.
Electronic acceptance of this Agreement pursuant to the Company’s instructions to the Grantee (including through an online acceptance process) is acceptable. 
  

							
	Dated:	 	  
	 		 	  

		 		 		 	Grantee’s Signature
				
		 		 		 	Grantee’s name and address:
				
		 		 		 	  

				
		 		 		 	  

				
		 		 		 	  

  
 7 

 RESTRICTED STOCK UNIT AWARD AGREEMENT 

FOR NON-EMPLOYEE DIRECTORS 

UNDER THE ZENDESK, INC. 

2014 STOCK OPTION AND INCENTIVE PLAN 
  

							
	Name of Grantee:	 	  
	 	
				
	No. of Restricted Stock Units:	 	  
	 		 	
				
	Grant Date:	 	  
	 		 	

 Pursuant to the Zendesk, Inc. 2014 Stock Option and Incentive Plan as amended through the date hereof (the
“Plan”), Zendesk, Inc. (the “Company”) hereby grants an award of the number of Restricted Stock Units listed above (an “Award”) to the Grantee named above. Each Restricted Stock Unit shall relate to one share of Common
Stock, par value $0.01 per share (the “Stock”) of the Company. 
 1. Restrictions on Transfer of Award. This Award may not
be sold, transferred, pledged, assigned or otherwise encumbered or disposed of by the Grantee, and any shares of Stock issuable with respect to the Award may not be sold, transferred, pledged, assigned or otherwise encumbered or disposed of until
(i) the Restricted Stock Units have vested as provided in Paragraph 2 of this Agreement and (ii) shares of Stock have been issued to the Grantee in accordance with the terms of the Plan and this Agreement. 

2. Vesting of Restricted Stock Units. The restrictions and conditions of Paragraph 1 of this Agreement shall lapse on the Vesting Date
or Dates specified in the following schedule so long as the Grantee remains in service as a member of the Board on such Dates. If a series of Vesting Dates is specified, then the restrictions and conditions in Paragraph 1 shall lapse only with
respect to the number of Restricted Stock Units specified as vested on such date. 
  

			
	 Incremental Number of Restricted Stock Units Vested
	  	Vesting Date
		
	              (    %)
	  	
	              (    %)
	  	
	              (    %)
	  	
	              (    %)
	  	

 The Administrator may at any time accelerate the vesting schedule specified in this Paragraph 2. 

3. Termination of Service. If the Grantee’s service with the Company and its Subsidiaries terminates for any reason (including
death or disability) prior to the satisfaction of the vesting conditions set forth in Paragraph 2 above, any Restricted Stock Units that have not vested as of such date shall automatically and without notice terminate and be forfeited, and neither
the Grantee nor any of his or her successors, heirs, assigns, or personal representatives will thereafter have any further rights or interests in such unvested Restricted Stock Units. 

 4. Issuance of Shares of Stock. As soon as practicable following each Vesting Date (but in
no event later than two and one-half months after the end of the year in which the Vesting Date occurs), the Company shall issue to the Grantee the number of shares of Stock equal to the aggregate number of Restricted Stock Units that have vested
pursuant to Paragraph 2 of this Agreement on such date and the Grantee shall thereafter have all the rights of a stockholder of the Company with respect to such shares. 

5. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Agreement shall be subject to and governed by all the
terms and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the meaning specified in the Plan, unless a different meaning is specified herein.

 6. Responsibility for Taxes. The Grantee acknowledges that, regardless of any action taken by the Company, the ultimate liability
for all Federal, state and other income tax, social insurance, payroll tax, fringe benefits tax, payment on account or other tax related items related to the Grantee’s participation in the Plan and legally applicable to the Grantee
(“Tax-Related Items”) is and remains the Grantee’s responsibility and may exceed the amount (if any) actually withheld by the Company. To the extent that the Company is required to withhold upon settlement of this Award with respect
to any Tax-Related Items, such withholding may be satisfied in accordance with the terms of the Plan. 
 7. Section 409A of the
Code. This Agreement shall be interpreted in such a manner that all provisions relating to the settlement of the Award are exempt from the requirements of Section 409A of the Code as “short-term deferrals” as described in
Section 409A of the Code. 
 8. No Obligation to Continue as a Director. Neither the Plan nor this Award confers upon the
Grantee any rights with respect to continuance as a Director. 
 9. Integration. This Agreement constitutes the entire agreement
between the parties with respect to this Award and supersedes all prior agreements and discussions between the parties concerning such subject matter. 

10. Nature of Grant. In accepting the Award, the Grantee acknowledges, understands and agrees that: 

(a) the Plan is established voluntarily by the Company, it is discretionary in nature and it may be modified, amended, suspended or terminated
by the Company at any time, to the extent permitted by the Plan; 
 (b) the grant of the Restricted Stock Units is voluntary and occasional
and does not create any contractual or other right to receive future grants of restricted stock units, or benefits in lieu of restricted stock units, even if restricted stock units have been granted in the past; 

  
 2 

 (c) all decisions with respect to future restricted stock units or other grants, if any, will be
at the sole discretion of the Company; 
 (d) the Award and the Grantee’s participation in the Plan shall not be interpreted as forming
an employment or other service contract with the Company; 
 (e) the Grantee is voluntarily participating in the Plan; 

(f) the Award and any shares of Stock acquired under the Plan are not intended to replace any pension rights or compensation; 

(g) the Award and any shares of Stock acquired under the Plan, and the income and value of same, are not part of normal or expected
compensation for any purpose, including, without limitation, calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses, long-service awards, pension or retirement benefits or payments or welfare
benefits or similar payments; 
 (h) the future value of the shares of Stock underlying the Award is unknown, indeterminable, and cannot be
predicted with certainty; 
 (i) no claim or entitlement to compensation or damages shall arise from forfeiture of the Award resulting from
the termination of the Grantee’s employment or other service relationship (for any reason whatsoever, whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Grantee provides services or the terms
of the Grantee’s employment or service agreement, if any), and in consideration of the grant of the Restricted Stock Units to which the Grantee is otherwise not entitled, the Grantee irrevocably agrees never to institute any claim against the
Company or any of its Subsidiaries, waives his or her ability, if any, to bring any such claim, and releases the Company and its Subsidiaries from any such claim; if, notwithstanding the foregoing, any such claim is allowed by a court of competent
jurisdiction, then, by participating in the Plan, the Grantee shall be deemed irrevocably to have agreed not to pursue such claim and agree to execute any and all documents necessary to request dismissal or withdrawal of such claim; and 

(j) unless otherwise provided in the Plan or by the Company in its discretion, the Award and the benefits evidenced by this Agreement do not
create any entitlement to have the Restricted Stock Units or any such benefits transferred to, or assumed by, another company nor to be exchanged, cashed out or substituted for, in connection with any corporate transaction affecting the Stock. 

11. No Advice Regarding Grant. The Company is not providing any tax, legal or financial advice, nor is the Company making any
recommendations regarding the Grantee’s participation in the Plan, or the Grantee’s acquisition or sale of the underlying shares of Stock. The Grantee is hereby advised to consult with his or her own personal tax, legal and financial
advisors regarding his or her participation in the Plan before taking any action related to the Plan. 
 12. Data
Privacy. The Grantee hereby explicitly and unambiguously consents to the collection, use and transfer, in electronic or other form, of the Grantee’s personal data as described in this Agreement and any other Award grant materials by and
among, as applicable, the Company and any Subsidiary for the exclusive purpose of implementing, administering and managing the Grantee’s participation in the Plan. 

  
 3 

 The Grantee understands that the Company and its Subsidiaries may hold certain personal
information about the Grantee, including, but not limited to, the Grantee’s name, home address and telephone number, date of birth, social insurance number or other identification number, salary, nationality, job title, any shares of stock or
directorships held in the Company, details of all awards or any other entitlement to shares of Stock awarded, canceled, exercised, vested, unvested or outstanding in the Grantee’s favor (“Data”), for the exclusive purpose of
implementing, administering and managing the Plan. 
 The Grantee understands that Data will be transferred to the stock plan
service provider selected by the Company, which is assisting the Company with the implementation, administration and management of the Plan. The Grantee understands that the recipients of the Data may be located in the United States or elsewhere,
and that the recipient’s country (e.g., the United States) may have different data privacy laws and protections than the Grantee’s country. The Grantee understands that he or she may request a list with the names and addresses of any
potential recipients of the Data by contacting his or her local human resources representative. The Grantee authorizes the Company, the stock plan service provider and any other possible recipients which may assist the Company (presently or in the
future) with implementing, administering and managing the Plan to receive, possess, use, retain and transfer the Data, in electronic or other form, for the sole purposes of implementing, administering and managing the Grantee’s participation in
the Plan. The Grantee understands that Data will be held only as long as is necessary to implement, administer and manage the Grantee’s participation in the Plan. The Grantee understands that he or she may, at any time, view Data, request
additional information about the storage and processing of Data, require any necessary amendments to Data or refuse or withdraw the consents herein, in any case without cost, by contacting in writing his or her local human resources representative.
Further, the Grantee understands that he or she is providing the consents herein on a purely voluntary basis. If the Grantee does not consent, or if the Grantee later seeks to revoke his or her consent, his or her employment status or service and
career with the Company or any Subsidiary will not be adversely affected; the only adverse consequence of refusing or withdrawing consent is that the Company would not be able to grant the Grantee Restricted Stock Units or other equity awards or
administer or maintain such awards. Therefore, the Grantee understands that refusing or withdrawing his or her consent may affect the Grantee’s ability to participate in the Plan. For more information on the consequences of the Grantee’s
refusal to consent or withdrawal of consent, the Grantee understands that he or she may contact his or her local human resources representative. 

13. Governing Law; Venue. The Award and the provisions of this Agreement are governed by, and subject to, the laws of the State of
Delaware, without regard to the conflict of law provisions. For purposes of any action, lawsuit or other proceedings brought to enforce this Agreement, relating to it, or arising from it, the parties hereby submit to and consent to the sole and
exclusive jurisdiction of the courts of San Francisco County, California, or the federal courts for the United States for the Northern District of California, and no other courts, including any courts where this grant is made and/or to be performed.

  
 4 

 14. Electronic Delivery and Acceptance. The Company may, in its sole discretion, decide to
deliver any documents related to current or future participation in the Plan by electronic means. The Grantee hereby consents to receive such documents by electronic delivery and agrees to participate in the Plan through an on-line or electronic
system established and maintained by the Company or a third party designated by the Company. 
 15. Severability. The provisions of
this Agreement are severable and if any one or more provisions are determined to be illegal or otherwise unenforceable, in whole or in part, the remaining provisions shall nevertheless be binding and enforceable. 

16. Notices. Notices hereunder shall be mailed or delivered to the Company at its principal place of business and shall be mailed or
delivered to the Grantee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

17. Imposition of Other Requirements. The Company reserves the right to impose other requirements on the Grantee’s participation
in the Plan, on the Award and on any shares of Stock issued upon settlement of the Award, to the extent the Company determines it is necessary or advisable for legal or administrative reasons, and to require the Grantee to sign any additional
agreements or undertakings that may be necessary to accomplish the foregoing. 
 18. Waiver. The Grantee acknowledges that a waiver
by the Company of breach of any provision of this Agreement shall not operate or be construed as a waiver of any other provision of this Agreement, or of any subsequent breach by the Grantee or any other Plan participant. 

  
 5 

 
			
	ZENDESK, INC.
		
	By:	 	  

		 	Title:

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned.
Electronic acceptance of this Agreement pursuant to the Company’s instructions to the Grantee (including through an online acceptance process) is acceptable. 
  

							
	Dated:	 	  
	 		 	  

		 		 		 	Grantee’s Signature
				
		 		 		 	Grantee’s name and address:
				
		 		 		 	  

				
		 		 		 	  

				
		 		 		 	  

  
 6 

 RESTRICTED STOCK UNIT AWARD AGREEMENT 

FOR NON-U.S. GRANTEES 

UNDER THE ZENDESK, INC. 

2014 STOCK OPTION AND INCENTIVE PLAN 
  

							
	Name of Grantee:	 	  
	 	
				
	No. of Restricted Stock Units:	 	  
	 		 	
				
	Grant Date:	 	  
	 		 	

 Pursuant to the Zendesk, Inc. 2014 Stock Option and Incentive Plan as amended through the date hereof (the
“Plan”), Zendesk, Inc. (the “Company”) hereby grants an award of the number of Restricted Stock Units listed above (an “Award”) to the Grantee named above. Each Restricted Stock Unit shall relate to one share of Common
Stock, par value $0.014 per share (the “Stock”) of the Company. The Award shall be governed by and subject to the terms of the Plan and this Restricted Stock Unit Award Agreement for Non-U.S. Grantees (the “Award Agreement”)
including any special terms and conditions for the Grantee’s country set forth in any appendix to this Award Agreement (the “Appendix”) (together with the Award Agreement, the “Agreement”). 

1. Restrictions on Transfer of Award. This Award may not be sold, transferred, pledged, assigned or otherwise encumbered or disposed of
by the Grantee, and any shares of Stock issuable with respect to the Award may not be sold, transferred, pledged, assigned or otherwise encumbered or disposed of until (i) the Restricted Stock Units have vested as provided in Paragraph 2 of
this Award Agreement and (ii) shares of Stock have been issued to the Grantee in accordance with the terms of the Plan and this Agreement. 

2. Vesting of Restricted Stock Units. The restrictions and conditions of Paragraph 1 of this Award Agreement shall lapse on the Vesting
Date or Dates specified in the following schedule so long as the Grantee remains an employee or other service provider with the Company or a Subsidiary on such Dates, as further described in Paragraph 3 of this Award Agreement. If a series of
Vesting Dates is specified, then the restrictions and conditions in Paragraph 1 shall lapse only with respect to the number of Restricted Stock Units specified as vested on such date. 

 

			
	 Incremental Number of Restricted Stock Units Vested
	  	Vesting Date
		
	              (    %)
	  	
	              (    %)
	  	
	              (    %)
	  	
	              (    %)
	  	

 The Administrator may at any time accelerate the vesting schedule specified in this Paragraph 2. 

 3. Termination of Service Relationship. If the Grantee’s service relationship with
the Company and its Subsidiaries terminates for any reason (including death or disability) prior to the satisfaction of the vesting conditions set forth in Paragraph 2 above, any Restricted Stock Units that have not vested as of such date shall
automatically and without notice terminate and be forfeited, and neither the Grantee nor any of his or her successors, heirs, assigns, or personal representatives will thereafter have any further rights or interests in such unvested Restricted Stock
Units. 
 For purposes of the Award, the Grantee’s service relationship will be considered terminated as of the date the Grantee is no
longer actively providing services to the Company or any Subsidiary (regardless of the reason for such termination and whether or not later found to be invalid or in breach of labor laws in the jurisdiction where the Grantee is providing services or
the terms of the Grantee’s service agreement, if any). Unless otherwise determined by the Company, the Grantee’s right to vest in the Restricted Stock Units under the Plan, if any, will terminate as of such date and will not be extended by
any notice period (e.g., the Grantee’s period of service would not include any contractual notice period or any period of “garden leave” or similar period mandated under labor laws in the jurisdiction where the Grantee is
providing services or the terms of the Grantee’s service agreement, if any). The Administrator shall have the exclusive discretion to determine when the Grantee is no longer actively providing services for purposes of his or her Award
(including whether the Grantee may still be considered to be providing services while on a leave of absence). 
 4. Issuance of Shares of
Stock. As soon as practicable following each Vesting Date (but in no event later than two and one-half months after the end of the year in which the Vesting Date occurs), the Company shall issue to the Grantee the number of shares of Stock equal
to the aggregate number of Restricted Stock Units that have vested pursuant to Paragraph 2 of this Award Agreement on such date and the Grantee shall thereafter have all the rights of a stockholder of the Company with respect to such shares. 

5. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Agreement shall be subject to and governed by all the
terms and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the meaning specified in the Plan, unless a different meaning is specified herein.

 6. Responsibility for Taxes. The Grantee acknowledges that, regardless of any action taken by the Company or, if different, any
Subsidiary for which the Grantee renders services (the “Service Recipient”), the ultimate liability for all income tax, social insurance, payroll tax, fringe benefits tax, payment on account or other tax-related items related to the
Grantee’s participation in the Plan and legally applicable to the Grantee (“Tax-Related Items”) is and remains the Grantee’s responsibility and may exceed the amount actually withheld by the Company or the Service Recipient. The
Grantee further acknowledges that the Company and/or the Service Recipient (i) make no representations or undertakings regarding the treatment of any Tax-Related Items in connection with any aspect of the Restricted Stock Units, including, but
not limited to, the grant, vesting or settlement of the Restricted Stock Units, the subsequent sale of any shares of Stock acquired under the Plan and the receipt of any dividends or dividend equivalents; and (ii) do not commit to and are under
no obligation to structure the terms of the 

  
 2 

 
grant or any aspect of the Restricted Stock Units to reduce or eliminate the Grantee’s liability for Tax-Related Items or achieve any particular tax result. Further, if the Grantee is
subject to Tax-Related Items in more than one jurisdiction between the Grant Date and the date of any relevant taxable or tax withholding event, as applicable, the Grantee acknowledges that the Company and/or the Service Recipient (or former service
recipient, as applicable) may be required to withhold or account for Tax-Related Items in more than one jurisdiction. 
 Prior to the relevant taxable or
tax withholding event, as applicable, the Grantee agrees to make adequate arrangements satisfactory to the Company and/or the Service Recipient to satisfy all Tax-Related Items. In this regard, the Grantee authorizes the Company and/or the Service
Recipient, or their respective agents, at their discretion, to satisfy their withholding obligations, if any, with regard to all Tax-Related Items by one or a combination of the following: 

 

	 	(1)	withholding from the Grantee’s wages or other cash compensation paid to the Grantee by the Company and/or the Service Recipient; or 

 

	 	(2)	withholding from proceeds of the sale of shares of Stock acquired upon settlement of the Restricted Stock Units either through a voluntary sale or through a mandatory sale arranged by the Company (on the Grantee’s
behalf pursuant to this authorization without further consent); or 

  

	 	(3)	withholding in shares of Stock to be issued upon settlement of the Restricted Stock Units; or 

  

	 	(4)	by any other method deemed by the Company to comply with applicable laws. 

 Depending on the
withholding method, the Company may withhold or account for Tax-Related Items by considering applicable minimum statutory withholding amounts or other applicable withholding rates, including maximum applicable rates, in which case the Grantee will
receive a refund of any over-withheld amount in cash and will have no entitlement to the equivalent in shares. If the obligation for Tax-Related Items is satisfied by withholding in shares of Stock, for tax purposes, the Grantee is deemed to have
been issued the full number of shares subject to the vested Restricted Stock Units, notwithstanding that a number of the shares are held back solely for the purpose of paying the Tax-Related Items. 

Finally, the Grantee agrees to pay to the Company or the Service Recipient any amount of Tax-Related Items that the Company or the Service
Recipient may be required to withhold or account for as a result of the Grantee’s participation in the Plan that cannot be satisfied by the means previously described. The Company may refuse to issue or deliver the shares or the proceeds of the
sale of shares of Stock if the Grantee fails to comply with his or her obligations in connection with the Tax-Related Items. 
 7.
Section 409A of the Code. This Agreement shall be interpreted in such a manner that all provisions relating to the settlement of the Award are exempt from the requirements of Section 409A of the Code as “short-term
deferrals” as described in Section 409A of the Code. 
 8. No Obligation to Continue Service Relationship. Neither the
Company nor any Subsidiary is obligated by or as a result of the Plan or this Agreement to continue the Grantee’s 

  
 3 

 
service relationship and neither the Plan nor this Agreement shall interfere in any way with the right of the Company or any Subsidiary to terminate the Grantee’s service relationship at any
time. 
 9. Integration. This Agreement constitutes the entire agreement between the parties with respect to this Award and
supersedes all prior agreements and discussions between the parties concerning such subject matter. 
 10. Nature of Grant. In
accepting the Award, the Grantee acknowledges, understands and agrees that: 
 (i) the Plan is established voluntarily by the Company, it is
discretionary in nature and it may be modified, amended, suspended or terminated by the Company at any time, to the extent permitted by the Plan; 

(ii) the grant of the Restricted Stock Units is voluntary and occasional and does not create any contractual or other right to receive future
grants of restricted stock units, or benefits in lieu of restricted stock units, even if restricted stock units have been granted in the past; 

(iii) all decisions with respect to future restricted stock units or other grants, if any, will be at the sole discretion of the Company; 

(iv) the Award and the Grantee’s participation in the Plan shall not be interpreted as forming a service contract with the Company; 

(v) the Grantee is voluntarily participating in the Plan; 

(vi) the Award and any shares of Stock acquired under the Plan are not intended to replace any pension rights or compensation; 

(vii) the Award and any shares of Stock acquired under the Plan, and the income and value of same, are not part of normal or expected
compensation for any purpose, including, without limitation, calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses, long-service awards, pension or retirement benefits or payments or welfare
benefits or similar payments; 
 (viii) the future value of the shares of Stock underlying the Award is unknown, indeterminable, and cannot
be predicted with certainty; 
 (ix) no claim or entitlement to compensation or damages shall arise from forfeiture of the Award resulting
from the termination of the Grantee’s service relationship (for any reason whatsoever, whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Grantee is providing services or the terms of the
Grantee’s service agreement, if any), and in consideration of the grant of the Restricted Stock Units to which the Grantee is otherwise not entitled, the Grantee irrevocably agrees never to institute any claim against the Company, the Service
Recipient or any other Subsidiary, waives his or her ability, if any, to bring any such claim, and releases, the Company, the Service Recipient and any other 

  
 4 

 
Subsidiary from any such claim; if, notwithstanding the foregoing, any such claim is allowed by a court of competent jurisdiction, then, by participating in the Plan, the Grantee shall be deemed
irrevocably to have agreed not to pursue such claim and agree to execute any and all documents necessary to request dismissal or withdrawal of such claim; 

(x) unless otherwise provided in the Plan or by the Company in its discretion, the Award and the benefits evidenced by this Agreement do not
create any entitlement to have the Restricted Stock Units or any such benefits transferred to, or assumed by, another company nor to be exchanged, cashed out or substituted for, in connection with any corporate transaction affecting the Stock; and

 (xi) neither, the Company, the Service Recipient nor any other Subsidiary shall be liable for any foreign exchange rate fluctuation
between the Grantee’s local currency and the United States Dollar that may affect the value of the Award or of any amounts due to the Grantee pursuant to settlement of the Award or the subsequent sale of any shares of Stock acquired upon
settlement. 
 11. No Advice Regarding Grant. The Company is not providing any tax, legal or financial advice, nor is the Company
making any recommendations regarding the Grantee’s participation in the Plan, or the Grantee’s acquisition or sale of the underlying shares of Stock. The Grantee is hereby advised to consult with his or her own personal tax, legal and
financial advisors regarding his or her participation in the Plan before taking any action related to the Plan. 
 12.
Data Privacy. The Grantee hereby explicitly and unambiguously consents to the collection, use and transfer, in electronic or other form, of the Grantee’s personal data as described in this Agreement and any other Award grant materials by
and among, as applicable, the Company, the Service Recipient and any other Subsidiary for the exclusive purpose of implementing, administering and managing the Grantee’s participation in the Plan. 

The Grantee understands that the Company, the Service Recipient and any other Subsidiary may hold certain personal information about the
Grantee, including, but not limited to, the Grantee’s name, home address and telephone number, date of birth, social insurance number or other identification number, salary, nationality, job title, any shares of stock or directorships held in
the Company, details of all awards or any other entitlement to shares of Stock awarded, canceled, exercised, vested, unvested or outstanding in the Grantee’s favor (“Data”), for the exclusive purpose of implementing, administering and
managing the Plan. 
 The Grantee understands that Data will be transferred to the stock plan service provider selected by the
Company, which is assisting the Company with the implementation, administration and management of the Plan. The Grantee understands that the recipients of the Data may be located in the United States or elsewhere, and that the recipient’s
country (e.g., the United States) may have different data privacy laws and protections than the Grantee’s country. The Grantee understands that he or she may request a list with the names and addresses of any potential recipients of the Data by
contacting his or her local human resources representative. The Grantee authorizes the Company, the stock plan service 

  
 5 

 
provider and any other possible recipients which may assist the Company (presently or in the future) with implementing, administering and managing the Plan to receive, possess, use, retain and
transfer the Data, in electronic or other form, for the sole purposes of implementing, administering and managing the Grantee’s participation in the Plan. The Grantee understands that Data will be held only as long as is necessary to implement,
administer and manage the Grantee’s participation in the Plan. The Grantee understands that he or she may, at any time, view Data, request additional information about the storage and processing of Data, require any necessary amendments to Data
or refuse or withdraw the consents herein, in any case without cost, by contacting in writing his or her local human resources representative. Further, the Grantee understands that he or she is providing the consents herein on a purely voluntary
basis. If the Grantee does not consent, or if the Grantee later seeks to revoke his or her consent, his or her service relationship with the Company, the Service Recipient or any other Subsidiary will not be adversely affected; the only adverse
consequence of refusing or withdrawing consent is that the Company would not be able to grant the Grantee Restricted Stock Units or other equity awards or administer or maintain such awards. Therefore, the Grantee understands that refusing or
withdrawing his or her consent may affect the Grantee’s ability to participate in the Plan. For more information on the consequences of the Grantee’s refusal to consent or withdrawal of consent, the Grantee understands that he or she may
contact his or her local human resources representative. 
 13. Governing Law; Venue. The Award and the provisions of this
Agreement are governed by, and subject to, the laws of the State of Delaware, without regard to the conflict of law provisions. For purposes of any action, lawsuit or other proceedings brought to enforce this Agreement, relating to it, or arising
from it, the parties hereby submit to and consent to the sole and exclusive jurisdiction of the courts of San Francisco County, California, or the federal courts for the United States for the Northern District of California, and no other courts,
including any courts where this grant is made and/or to be performed. 
 14. Electronic Delivery and Acceptance. The Company may, in
its sole discretion, decide to deliver any documents related to current or future participation in the Plan by electronic means. The Grantee hereby consents to receive such documents by electronic delivery and agrees to participate in the Plan
through an on-line or electronic system established and maintained by the Company or a third party designated by the Company. 
 15.
Language. If the Grantee has received this Agreement, or any other document related to the Award and/or the Plan translated into a language other than English and if the meaning of the translated version is different than the English version,
the English version will control. 
 16. Severability. The provisions of this Agreement are severable and if any one or more
provisions are determined to be illegal or otherwise unenforceable, in whole or in part, the remaining provisions shall nevertheless be binding and enforceable. 

17. Notices. Notices hereunder shall be mailed or delivered to the Company at its principal place of business and shall be mailed or
delivered to the Grantee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

  
 6 

 18. Appendix. Notwithstanding any provisions in this Award Agreement, the Award shall be
subject to any special terms and conditions set forth in any Appendix to this Award Agreement for the Grantee’s country. Moreover, if the Grantee relocates to one of the countries included in the Appendix, the special terms and conditions for
such country will apply to the Grantee, to the extent the Company determines that the application of such terms and conditions is necessary or advisable for legal or administrative reasons. The Appendix constitutes part of this Award Agreement. 

19. Insider Trading Restrictions/Market Abuse Laws. The Grantee acknowledges that, depending on the Grantee’s country of
residence, the Grantee may be subject to insider trading restrictions and/or market abuse laws, which may affect the Grantee’s ability to acquire or sell shares of Stock or rights to shares of Stock (e.g., Restricted Stock Units) under
the Plan during such times as the Grantee is considered to have “inside information” regarding the Company (as defined by the laws in the Grantee’s country). Any restrictions under these laws or regulations are separate from and in
addition to any restrictions that may be imposed under any applicable Company insider trading policy. The Grantee acknowledges that it is his or her responsibility to comply with any applicable restrictions, and the Grantee is advised to speak to
his or her personal advisor on this matter. 
 20. Imposition of Other Requirements. The Company reserves the right to impose other
requirements on the Grantee’s participation in the Plan, on the Award and on any shares of Stock issued upon settlement of the Award, to the extent the Company determines it is necessary or advisable for legal or administrative reasons, and to
require the Grantee to sign any additional agreements or undertakings that may be necessary to accomplish the foregoing. 
 21.
Waiver. The Grantee acknowledges that a waiver by the Company of breach of any provision of this Agreement shall not operate or be construed as a waiver of any other provision of this Agreement, or of any subsequent breach by the Grantee or
any other Plan participant. 

  
 7 

 
			
	ZENDESK, INC.
		
	By:	 	  

		 	Title:

 The Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned. Electronic
acceptance of this Agreement pursuant to the Company’s instructions to the Grantee (including through an online acceptance process) is acceptable. 
  

							
	Dated:	 	  
	 		 	  

		 		 		 	Grantee’s Signature
				
		 		 		 	Grantee’s name and address:
				
		 		 		 	  

				
		 		 		 	  

				
		 		 		 	  

  
 8 

 APPENDIX 

TO THE 
 RESTRICTED
STOCK UNIT AWARD AGREEMENT 
 FOR NON-U.S. GRANTEES 

Terms and Conditions 
 This Appendix includes
additional terms and conditions that govern the Award if the Grantee works and/or resides in one of the countries listed below. If the Grantee is a citizen or resident of a country other than the one in which the Grantee is currently working and/or
residing (or is considered as such for local law purposes), or the Grantee transfers employment to a different country after the Award is granted, the Company will, in its discretion, determine the extent to which the terms and conditions contained
herein will apply to the Grantee. 
 Notifications 

This Appendix also includes information regarding certain other issues of which the Grantee should be aware with respect to the Grantee’s participation in
the Plan. The information is based on the securities, exchange control and other laws in effect in the respective countries as of December 2013. Such laws are often complex and change frequently. As a result, the Company strongly recommends that the
Grantee not rely on the information noted herein as the only source of information relating to the consequences of participation in the Plan because the information may be out-of-date at the time the Grantee vests in the Restricted Stock Units or
sells any shares of Stock issued at settlement of the Award. 
 In addition, the information contained herein is general in nature and may not apply to the
Grantee’s particular situation. As a result, the Company is not in a position to assure the Grantee of any particular result. Accordingly, the Grantee is strongly advised to seek appropriate professional advice as to how the relevant laws in
the Grantee’s country may apply to the Grantee’s individual situation. 
 If the Grantee is a citizen or resident of a country other than the one
in which the Grantee is currently working and/or residing (or is considered as such for local law purposes), or if the Grantee transfers employment to a different country after the Award is granted, the notifications contained in this Appendix may
not be applicable to the Grantee in the same manner. 
 Capitalized terms used but not defined in this Appendix shall have the same meanings assigned to
them in the Plan and the Award Agreement. 
 AUSTRALIA 

Notifications 
 Securities Law Information.
If the Grantee acquires shares of Stock under the Plan and offers the shares for sale to a person or entity resident in Australia, the offer may be subject to disclosure requirements under Australian law. The Grantee should consult with his or her
personal legal advisor before making any such offer in Australia. 

  
 9 

 BRAZIL 

Terms and Conditions 
 Compliance with Law.
The Grantee must comply with applicable Brazilian laws and is responsible for paying any and all applicable taxes associated with the settlement of the Award, the receipt of any dividends, and the sale of shares of Stock acquired under the Plan.

 Notifications 
 Exchange Control
Information. If the Grantee is a resident or is domiciled in Brazil, he or she will be required to submit an annual declaration of assets and rights held outside of Brazil to the Central Bank of Brazil if the aggregate value of such assets and
rights equals or exceeds US$100,000. Assets and rights that must be reported include any shares of Stock acquired under the Plan. Foreign individuals holding Brazilian visas are considered Brazilian residents for purposes of this reporting
requirement and must declare at least the assets held abroad that were acquired subsequent to the date of admittance as a resident of Brazil. 
 DENMARK

 Notifications 
 Securities/Tax Reporting
Information. The Grantee may hold shares of Stock acquired under the Plan in a safety-deposit account (e.g., a brokerage account) with either a Danish bank or with an approved foreign broker or bank. If the shares of Stock are held with a
foreign broker or bank, the Grantee is required to inform the Danish Tax Administration about the safety-deposit account. For this purpose, the Grantee must file a Form V (Erklaering V) with the Danish Tax Administration. Both the Grantee and the
broker or bank must sign the Form V. By signing the Form V, the broker or bank undertakes an obligation, without further request each year, to forward information to the Danish Tax Administration concerning the shares of Stock in the safety-deposit
account. In the event that the applicable broker or bank with which the account is held does not wish to, or, pursuant to the laws of the country in question, is not allowed to assume such obligation to report, the Grantee will be solely responsible
for providing certain details regarding the foreign brokerage or bank account and any shares of Stock acquired in connection with the Plan and held in such account to the Danish Tax Administration as part of the Grantee’s annual income tax
return. By signing the Form V, the Grantee authorizes the Danish Tax Administration to examine the account. A sample of the Declaration V can be found at the following website: www.skat.dk/getFile.aspx?Id=47392. 

In addition, if the Grantee opens a brokerage account (or a deposit account with a U.S. bank), the brokerage account (or bank account, as applicable) will be
treated as a deposit account because cash can be held in the account. Therefore, the Grantee must also file a Form K (Erklaering K) with the Danish Tax Administration. Both the Grantee and the broker must sign the Form K. By signing the
Form K, the broker or bank, as applicable, undertakes an obligation, without further 

  
 10 

 
request each year, to forward information to the Danish Tax Administration concerning the content of the deposit account. In the event that the applicable financial institution (broker or bank)
with which the account is held does not wish to, or, pursuant to the laws of the country in question, is not allowed to assume such obligation to report, the Grantee will be solely responsible for providing certain details regarding the foreign
brokerage or bank account to the Danish Tax Administration as part of the Grantee’s annual income tax return. By signing the Form K, the Grantee authorizes the Danish Tax Administration to examine the account. A sample of Declaration K can be
found at the following website: www.skat.dk/getFile.aspx?Id=42409&newwindow=true. 
 FRANCE 

Term and Conditions 
 Language Consent. By
accepting the Award, the Grantee confirms having read and understood the documents relating to this grant (the Plan and the Agreement) which were provided to the Grantee in English. The Grantee accepts the terms of those documents accordingly. 

Reconnaissance Relative à la Langue Utilisée. En acceptant le attribution, le Bénéficiaire confirme avoir lu et compris
les documents relatifs à cette attribution (le Plan et ce Contrat) qui ont été communiqués au Bénéficiaire en langue anglaise. Le Bénéficiaire accepte les termes de ces documents en
connaissance de cause. 
 Notifications 

Foreign Asset/Account Reporting Information. If the Grantee maintains a foreign bank account, the Grantee is required to report such account to the
French tax authorities on his or her annual tax return. 
 GERMANY 

Notifications 
 Exchange Control Information.
Cross-border payments in excess of €12,500 must be reported monthly to the German Federal Bank (Bundesbank). In case of payments in connection with securities (including proceeds realized upon the sale of shares of Stock or the receipt
of dividends), the report must be made by the 5th day of the month following the month in which the payment was received. Effective from September 2013, the report must be filed electronically. The form of report (“Allgemeine Meldeportal
Statistik”) can be accessed via the Bundesbank’s website (www.bundesbank.de) and is available in both German and English. The Grantee is responsible for making this report. 

  
 11 

 IRELAND 

Notifications 
 Director Reporting
Obligation. If the Grantee is a director, shadow director or secretary of a Subsidiary in Ireland, the Grantee must notify the Irish Subsidiary in writing within five business days of receiving or disposing of an interest in the Company
(e.g., Restricted Stock Units, shares of Stock), or within five business days of becoming aware of the event giving rise to the notification requirement or within five days of becoming a director or secretary if such an interest exists at the
time. This notification requirement also applies with respect to the interests of the Grantee’s spouse or children under the age of 18 (whose interests will be attributed to the Grantee if the Grantee is a director, shadow director or
secretary). 
 JAPAN 
 Notifications 

Foreign Asset/Account Reporting Information. The Grantee is required to report details of any assets held outside of Japan as of December 31,
including shares of Stock acquired under the Plan, to the extent such assets have a total net fair market value exceeding ¥50,000,000. Such report will be due by March 15 each year. The Grantee is responsible for complying with this
reporting obligation and is advised to consult with his or her personal tax advisor in this regard. 
 PHILIPPINES 

Notifications 
 Securities Law Information.
The Grantee acknowledges that he or she is permitted to sell shares of Stock acquired under the Plan through the designated Plan broker appointed by the Company (or such other broker to whom the Grantee transfers his or her shares of Stock),
provided that such sale takes place outside of the Philippines through the facilities of the [insert stock market on which shares will be listed] on which the shares are listed. 

SINGAPORE 
 Notifications 

Securities Law Information. The grant of the Restricted Stock Units is being made pursuant to the “Qualifying Person” exemption” under
section 273(1)(f) of the Securities and Futures Act (Chapter 289, 2006 Ed.) (“SFA”). The Plan has not been lodged or registered as a prospectus with the Monetary Authority of Singapore. The Grantee should note that the Restricted Stock
Units are subject to section 257 of the SFA and the Grantee will not be able to make (i) any subsequent sale of the shares of Stock in Singapore or (ii) any offer of such subsequent sale of the shares of Stock subject to the Restricted
Stock Units in Singapore, unless such sale or offer in is made pursuant to the exemptions under Part XIII Division 1 Subdivision (4) (other than section 280) of the SFA. The shares of Stock are currently traded on the [insert stock exchange on
which shares will be listed], which is located outside of Singapore, under the ticker symbol “[insert]” and shares of Stock acquired under the Plan may be sold through this exchange. 

  
 12 

 Director Reporting Obligation. If the Grantee is a director, associate director or shadow director of a
Singapore Subsidiary, he or she is subject to certain notification requirements under the Singapore Companies Act, regardless of whether he or she is a Singapore resident or employed in Singapore. Among these requirements is the obligation to notify
the Singapore Subsidiary in writing when the Grantee receives or disposes of an interest (e.g., Restricted Stock Units, shares of Stock) in the Company or a Subsidiary. These notifications must be made within two business days of acquiring or
disposing of any interest in the Company or any Subsidiary or within two business days of becoming a director, associate director or shadow director if such an interest exists at that time. 

UNITED KINGDOM 
 Terms and Conditions 

Responsibility for Taxes. The following provisions supplement Paragraph 6 of the Award Agreement: 

If payment or withholding of income tax is not made within ninety (90) days of the event giving rise to the Tax-Related Items or such other period
specified in Section 222(1)(c) of the U.K. Income Tax (Earnings and Pensions) Act 2003 (the “Due Date”), the amount of any uncollected income tax will constitute a loan owed by the Grantee to the Service Recipient, effective on the
Due Date. The loan will bear interest at the then-current official rate of Her Majesty’s Revenue and Customs (“HMRC”) and it will be immediately due and repayable by the Grantee, and the Company or the Service Recipient may recover it
at any time thereafter by any of the means referred to in Paragraph 6 of the Award Agreement. 
 Notwithstanding the foregoing, if the Grantee is a director
or executive officer of the Company (within the meaning of Section 13(k) of the 1934 Act), the Grantee will not be eligible for such a loan to cover the unpaid income tax. In the event that the Grantee is such a director or executive officer
and the income tax is not collected from or paid by the Grantee by the Due Date, the amount of any uncollected taxes will constitute a benefit to the Grantee on which additional income tax and national insurance contributions (“NICs”) will
be payable. The Grantee will be responsible for reporting and paying any income tax due on this additional benefit directly to HMRC under the self-assessment regime and for paying to the Company or the Service Recipient, as applicable, any employee
NICs due on this additional benefit, which the Company or the Service Recipient may recover from the Grantee by any of the means referred to in Paragraph 6 of the Award Agreement. 

Joint Election. As a condition of the Grantee’s participation in the Plan and vesting of the Restricted Stock Units, the Grantee shall accept any
liability for secondary Class 1 NICs which may be payable by the Company and/or the Service Recipient in connection with the Award and any event giving rise to Tax-Related Items (the “Employer’s Liability”). Without prejudice to the
foregoing, the Grantee shall enter into a joint election with the Company or the Service 

  
 13 

 
Recipient, the form of such joint election being formally approved by HMRC (the “Joint Election”), and any other required consent or elections, including any such other joint elections
as may be required between the Grantee and any successor to the Company and/or the Service Recipient. The Company and/or the Service Recipient may collect the Employer’s Liability from the Grantee by any of the means set forth in Paragraph 6 of
the Award Agreement. 

  
 14 

 RESTRICTED STOCK AWARD AGREEMENT 

UNDER THE ZENDESK, INC. 

2014 STOCK OPTION AND INCENTIVE PLAN 
  

							
	Name of Grantee:	 	  
	 	
				
	No. of Shares:	 	  
	 		 	
				
	Grant Date:	 	  
	 		 	

 Pursuant to the Zendesk, Inc. 2014 Stock Option and Incentive Plan as amended through the date hereof (the
“Plan”), Zendesk, Inc. (the “Company”) hereby grants a Restricted Stock Award (an “Award”) to the Grantee named above. Upon acceptance of this Award, the Grantee shall receive the number of shares of Common Stock, par
value $0.01 per share (the “Stock”) of the Company specified above, subject to the restrictions and conditions set forth herein and in the Plan. The Company acknowledges the receipt from the Grantee of consideration with respect to the par
value of the Stock in the form of cash, past or future services rendered to the Company by the Grantee or such other form of consideration as is acceptable to the Administrator. 

1. Award. The shares of Restricted Stock awarded hereunder shall be issued and held by the Company’s transfer agent in book entry
form, and the Grantee’s name shall be entered as the stockholder of record on the books of the Company. Thereupon, the Grantee shall have all the rights of a stockholder with respect to such shares, including voting and dividend rights,
subject, however, to the restrictions and conditions specified in Paragraph 2 below. The Grantee shall (i) sign and deliver to the Company a copy of this Award Agreement and (ii) deliver to the Company a stock power endorsed in blank. 

2. Restrictions and Conditions. 

(a) Any book entries for the shares of Restricted Stock granted herein shall bear an appropriate legend, as determined by the Administrator in
its sole discretion, to the effect that such shares are subject to restrictions as set forth herein and in the Plan. 
 (b) Shares of
Restricted Stock granted herein may not be sold, assigned, transferred, pledged or otherwise encumbered or disposed of by the Grantee prior to vesting. 

(c) If the Grantee’s employment with the Company and its Subsidiaries is voluntarily or involuntarily terminated for any reason
(including death) prior to vesting of shares of Restricted Stock granted herein, all shares of Restricted Stock shall immediately and automatically be forfeited and returned to the Company. 

3. Vesting of Restricted Stock. The restrictions and conditions in Paragraph 2 of this Agreement shall lapse on the Vesting Date or
Dates specified in the following schedule so long as the Grantee remains an employee of the Company or a Subsidiary on such Dates. If a series of Vesting Dates is specified, then the restrictions and conditions in Paragraph 2 shall lapse only with
respect to the number of shares of Restricted Stock specified as vested on such date. 
  

			
	 Incremental Number of Shares Vested
	  	Vesting Date
		
	              (    %)
	  	
	              (    %)
	  	            
	              (    %)
	  	            
	              (    %)
	  	            
	              (    %)
	  	            

 Subsequent to such Vesting Date or Dates, the shares of Stock on which all restrictions and
conditions have lapsed shall no longer be deemed Restricted Stock. The Administrator may at any time accelerate the vesting schedule specified in this Paragraph 3. 

4. Dividends. Dividends on shares of Restricted Stock shall be paid currently to the Grantee. 

5. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Award shall be subject to and governed by all the terms
and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the meaning specified in the Plan, unless a different meaning is specified herein. 

6. Transferability. This Agreement is personal to the Grantee, is non-assignable and is not transferable in any manner, by operation of
law or otherwise, other than by will or the laws of descent and distribution. 
 7. Responsibility for Taxes. The Grantee
acknowledges that, regardless of any action taken by the Company or, if different, the Subsidiary which employs the Grantee (the “Employer”), the ultimate liability for all Federal, state and other income tax, social insurance, payroll
tax, fringe benefits tax, payment on account or other tax related items related to the Grantee’s participation in the Plan and legally applicable to the Grantee (“Tax-Related Items”) is and remains the Grantee’s responsibility
and may exceed the amount actually withheld by the Company or the Employer. The Grantee further acknowledges that the Company and/or the Employer (i) make no representations or undertakings regarding the treatment of any Tax-Related Items in
connection with any aspect of the Award, including, but not limited to, the grant or vesting of the Restricted Stock, the subsequent sale of any shares of Stock acquired under the Plan and the receipt of any dividends or dividend equivalents; and
(ii) do not commit to and are under no obligation to structure the terms of the grant or any aspect of the Restricted Stock to reduce or eliminate the Grantee’s liability for Tax-Related Items or achieve any particular tax result. Further,
if the Grantee is subject to Tax-Related Items in more than one jurisdiction between the Grant Date and the date of any relevant taxable or tax withholding event, as applicable, the Grantee acknowledges that the Company and/or the Employer (or
former employer, as applicable) may be required to withhold or account for Tax-Related Items in more than one jurisdiction. 
 (a) Prior to
the relevant taxable or tax withholding event, as applicable, the Grantee agrees to make adequate arrangements satisfactory to the Company and/or the Employer 

  
 2 

 
to satisfy all Tax-Related Items. In this regard, the Grantee authorizes the Company and/or the Employer, or their respective agents, at their discretion, to satisfy their withholding
obligations, if any, with regard to all Tax-Related Items by one or a combination of the following: 
 (i) withholding from
the Grantee’s wages or other cash compensation paid to the Grantee by the Company and/or the Employer; or 
 (ii)
withholding from proceeds of the sale of shares of Stock that are no longer subject to restrictions either through a voluntary sale or through a mandatory sale arranged by the Company (on the Grantee’s behalf pursuant to this authorization
without further consent); or 
 (iii) by any other method deemed by the Company to comply with applicable laws. 

(b) Depending on the withholding method and subject to the foregoing, the Company may withhold or account for Tax-Related Items by considering
applicable minimum statutory withholding amounts or other applicable withholding rates, including maximum applicable rates, in which case the Grantee will receive a refund of any over-withheld amount in cash and will have no entitlement to the
equivalent in shares. 
 (c) Finally, the Grantee agrees to pay to the Company or the Employer any amount of Tax-Related Items that the
Company or the Employer may be required to withhold or account for as a result of the Grantee’s participation in the Plan that cannot be satisfied by the means previously described. The Company may refuse to remove the restrictions on the
shares of Stock if the Grantee fails to comply with his or her obligations in connection with the Tax-Related Items. 
 (d) Election
Under Section 83(b). The Grantee and the Company hereby agree that the Grantee may, within 30 days following the Grant Date of this Award, file with the Internal Revenue Service and the Company an election under Section 83(b) of the
Internal Revenue Code. In the event the Grantee makes such an election, he or she agrees to provide a copy of the election to the Company. The Grantee acknowledges that he or she is responsible for obtaining the advice of his or her tax advisors
with regard to the Section 83(b) election and that he or she is relying solely on such advisors and not on any statements or representations of the Company or any of its agents with regard to such election. 

8. No Obligation to Continue Employment. Neither the Company nor any Subsidiary is obligated by or as a result of the Plan or this
Agreement to continue the Grantee in employment and neither the Plan nor this Agreement shall interfere in any way with the right of the Company or any Subsidiary to terminate the employment of the Grantee at any time. 

9. Integration. This Agreement constitutes the entire agreement between the parties with respect to this Award and supersedes all prior
agreements and discussions between the parties concerning such subject matter. 
 10. Nature of Grant. In accepting the Award, the
Grantee acknowledges, understands and agrees that: 
 (a) the Plan is established voluntarily by the Company, it is discretionary in nature
and it may be modified, amended, suspended or terminated by the Company at any time, to the extent permitted by the Plan; 

  
 3 

 (b) the grant of the Restricted Stock is voluntary and occasional and does not create any
contractual or other right to receive future grants of restricted stock, or benefits in lieu of restricted stock, even if restricted stock has been granted in the past; 

(c) all decisions with respect to future restricted stock or other grants, if any, will be at the sole discretion of the Company; 

(d) the Award and the Grantee’s participation in the Plan shall not be interpreted as forming an employment or other service contract
with the Company; 
 (e) the Grantee is voluntarily participating in the Plan; 

(f) the Award and any shares of Stock acquired under the Plan are not intended to replace any pension rights or compensation; 

(g) the Award and any shares of Stock acquired under the Plan, and the income and value of same, are not part of normal or expected
compensation for any purpose, including, without limitation, calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses, long-service awards, pension or retirement benefits or payments or welfare
benefits or similar payments; 
 (h) the future value of the shares of Stock underlying the Award is unknown, indeterminable, and cannot be
predicted with certainty; 
 (i) no claim or entitlement to compensation or damages shall arise from forfeiture of the Award resulting from
the termination of the Grantee’s employment or other service relationship (for any reason whatsoever, whether or not later found to be invalid or in breach of employment laws in the jurisdiction where the Grantee provides services or the terms
of the Grantee’s employment or service agreement, if any), and in consideration of the grant of the Restricted Stock to which the Grantee is otherwise not entitled, the Grantee irrevocably agrees never to institute any claim against the Company
or any of its Subsidiaries, waives his or her ability, if any, to bring any such claim, and releases the Company and any Subsidiary from any such claim; if, notwithstanding the foregoing, any such claim is allowed by a court of competent
jurisdiction, then, by participating in the Plan, the Grantee shall be deemed irrevocably to have agreed not to pursue such claim and agree to execute any and all documents necessary to request dismissal or withdrawal of such claim; and 

(j) unless otherwise provided in the Plan or by the Company in its discretion, the Award and the benefits evidenced by this Agreement do not
create any entitlement to have the Restricted Stock or any such benefits transferred to, or assumed by, another company nor to be exchanged, cashed out or substituted for, in connection with any corporate transaction affecting the Stock. 

  
 4 

 11. No Advice Regarding Grant. The Company is not providing any tax, legal or financial
advice, nor is the Company making any recommendations regarding the Grantee’s participation in the Plan, or the Grantee’s acquisition or sale of the underlying shares of Stock. The Grantee is hereby advised to consult with his or her own
personal tax, legal and financial advisors regarding his or her participation in the Plan before taking any action related to the Plan. 

12. Data Privacy. The Grantee hereby explicitly and unambiguously consents to the collection, use and transfer, in
electronic or other form, of the Grantee’s personal data as described in this Agreement and any other Award grant materials by and among, as applicable, the Employer, the Company and any of its Subsidiaries for the exclusive purpose of
implementing, administering and managing the Grantee’s participation in the Plan. 
 The Grantee understands that the
Employer, the Company and its Subsidiaries may hold certain personal information about the Grantee, including, but not limited to, the Grantee’s name, home address and telephone number, date of birth, social insurance number or other
identification number, salary, nationality, job title, any shares of stock or directorships held in the Company, details of all awards or any other entitlement to shares of Stock awarded, canceled, exercised, vested, unvested or outstanding in the
Grantee’s favor (“Data”), for the exclusive purpose of implementing, administering and managing the Plan. 

The Grantee understands that Data will be transferred to the stock plan service provider selected by the Company, which is assisting the
Company with the implementation, administration and management of the Plan. The Grantee understands that the recipients of the Data may be located in the United States or elsewhere, and that the recipient’s country (e.g., the United States) may
have different data privacy laws and protections than the Grantee’s country. The Grantee understands that he or she may request a list with the names and addresses of any potential recipients of the Data by contacting his or her local human
resources representative. The Grantee authorizes the Company, the stock plan service provider and any other possible recipients which may assist the Company (presently or in the future) with implementing, administering and managing the Plan to
receive, possess, use, retain and transfer the Data, in electronic or other form, for the sole purposes of implementing, administering and managing the Grantee’s participation in the Plan. The Grantee understands that Data will be held only as
long as is necessary to implement, administer and manage the Grantee’s participation in the Plan. The Grantee understands that he or she may, at any time, view Data, request additional information about the storage and processing of Data,
require any necessary amendments to Data or refuse or withdraw the consents herein, in any case without cost, by contacting in writing his or her local human resources representative. Further, the Grantee understands that he or she is providing the
consents herein on a purely voluntary basis. If the Grantee does not consent, or if the Grantee later seeks to revoke his or her consent, his or her employment status or service and career with the Company or any Subsidiary will not be adversely
affected; the only adverse consequence of refusing or withdrawing consent is that the Company would not be able to grant the Grantee Restricted Stock or other equity awards or administer or maintain such awards. Therefore, the Grantee understands
that refusing or withdrawing his or her consent may affect the Grantee’s ability to participate in the Plan. For more information on the consequences of the Grantee’s refusal to consent or withdrawal of consent, the Grantee understands
that he or she may contact his or her local human resources representative. 

  
 5 

 13. Governing Law; Venue. The Award and the provisions of this Agreement are governed by,
and subject to, the laws of the State of Delaware, without regard to the conflict of law provisions. For purposes of any action, lawsuit or other proceedings brought to enforce this Agreement, relating to it, or arising from it, the parties hereby
submit to and consent to the sole and exclusive jurisdiction of the courts of San Francisco County, California, or the federal courts for the United States for the Northern District of California, and no other courts, including any courts where this
grant is made and/or to be performed. 
 14. Electronic Delivery and Acceptance. The Company may, in its sole discretion, decide to
deliver any documents related to current or future participation in the Plan by electronic means. The Grantee hereby consents to receive such documents by electronic delivery and agrees to participate in the Plan through an on-line or electronic
system established and maintained by the Company or a third party designated by the Company. 
 15. Severability. The provisions of
this Agreement are severable and if any one or more provisions are determined to be illegal or otherwise unenforceable, in whole or in part, the remaining provisions shall nevertheless be binding and enforceable. 

16. Notices. Notices hereunder shall be mailed or delivered to the Company at its principal place of business and shall be mailed or
delivered to the Grantee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

17. Insider Trading Restrictions/Market Abuse Laws. The Grantee acknowledges that, depending on the Grantee’s country of
residence, the Grantee may be subject to insider trading restrictions and/or market abuse laws, which may affect the Grantee’s ability to acquire or sell shares of Stock under the Plan during such times as the Grantee is considered to have
“inside information” regarding the Company (as defined by the laws in the Grantee’s country). Any restrictions under these laws or regulations are separate from and in addition to any restrictions that may be imposed under any
applicable Company insider trading policy. The Grantee acknowledges that it is his or her responsibility to comply with any applicable restrictions, and the Grantee is advised to speak to his or her personal advisor on this matter. 

18. Imposition of Other Requirements. The Company reserves the right to impose other requirements on the Grantee’s participation
in the Plan, on the Award and on any shares of Stock issued pursuant to this Award, to the extent the Company determines it is necessary or advisable for legal or administrative reasons, and to require the Grantee to sign any additional agreements
or undertakings that may be necessary to accomplish the foregoing. 
 19. Waiver. The Grantee acknowledges that a waiver by the
Company of breach of any provision of this Agreement shall not operate or be construed as a waiver of any other provision of this Agreement, or of any subsequent breach by the Grantee or any other Plan participant. 

  
 6 

 
			
	ZENDESK, INC.
		
	By:	 	  

		 	Title:

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned.
Electronic acceptance of this Agreement pursuant to the Company’s instructions to the Grantee (including through an online acceptance process) is acceptable. 
  

							
	Dated:	 	  
	 		 	  

		 		 		 	Grantee’s Signature
				
		 		 		 	Grantee’s name and address:
				
		 		 		 	  

				
		 		 		 	  

				
		 		 		 	  

  
 7

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