Document:

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. 

  
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 “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.

  
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 “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; 

  
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 (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. 

  
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 (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) 7,500,000 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 7,500,000 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 5,000,000 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. 

  
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 (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 

  
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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. 

  
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 (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. 

  
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 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 

  
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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. 

  
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 (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 5,000,000 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: February 2014 

DATE APPROVED BY STOCKHOLDERS: April 2014 

  
 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 $0.01 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:
				
		 		 		 	  

				
		 		 		 	  

				
		 		 		 	  

  
 7EX-10.4

 Exhibit 10.4 

ZENDESK, INC. 
 2014
EMPLOYEE STOCK PURCHASE PLAN 
 The purpose of the Zendesk, Inc. 2014 Employee Stock Purchase Plan (the “Plan”) is to provide
eligible employees of Zendesk, Inc. (the “Company”) and each Designated Company (as defined in Section 11) with opportunities to purchase shares of the Company’s common stock, par value $0.01 per share (the “Common
Stock”). 3,625,000 shares of Common Stock in the aggregate have been approved and reserved for this purpose, plus on January 1, 2015 and each January 1 thereafter, the number of shares of Common Stock reserved and available for
issuance under the Plan shall be cumulatively increased by the lesser of 1,500,000 shares, one percent of the number of shares of Common Stock issued and outstanding on the immediately preceding December 31, and such lesser number of shares of
common stock determined by the Administrator. 
 The Plan includes two components: a Code Section 423 Component (the “423
Component”) and a non-Code Section 423 Component (the “Non-423 Component”). It is intended for the 423 Component to constitute an “employee stock purchase plan” within the meaning of Section 423(b) of the U.S.
Internal Revenue Code of 1986, as amended (the “Code”) and the 423 Component shall be interpreted in accordance with that intent (although the Company makes no undertaking or representation to maintain such qualification). In addition,
this Plan authorizes the grant of options under the Non-423 Component that does not qualify as an “employee stock purchase plan” under Section 423 of the Code because of deviations necessary to permit participation in the Plan by
employees who are foreign nationals or employed outside of the United States while complying with applicable foreign laws. Except as otherwise provided herein, the Non-423 Component will operate and be administered in the same manner as the 423
Component. 

 1. Administration. The Plan will be administered by the Compensation Committee of the
Board of Directors and/or such other person or persons (the “Administrator”) appointed by the Company’s Board of Directors (the “Board”) for such purpose. The Administrator has authority at any time to: (i) adopt, alter
and repeal such rules, guidelines and practices for the administration and operation of the Plan and for its own acts and proceedings as it shall deem advisable, including to accommodate the specific requirements of local laws and procedures for
jurisdictions outside of the United States. (ii) interpret the terms and provisions of the Plan; (iii) make all determinations it deems advisable for the administration of the Plan; (iv) decide all disputes arising in connection with
the Plan; and (v) otherwise supervise the administration of the Plan. All interpretations and decisions of the Administrator shall be binding on all persons, including the Company and the Participants. No member of the Board or individual
exercising administrative authority with respect to the Plan shall be liable for any action or determination made in good faith with respect to the Plan or any option granted hereunder. 

2. Offerings. The Company will make one or more offerings to eligible employees to purchase Common Stock under the Plan
(“Offerings”) consisting of one or more Purchase Periods. Unless otherwise determined by the Administrator, the initial Offering will begin on the Registration Date and will end on the date that is eighteen months following the
Registration Date (“the Initial Offering”). Unless otherwise determined by the Administrator, subsequent Offerings will be eighteen months long and begin every six months on dates determined by the Administrator. The Administrator may, in
its discretion, designate a different period for any Offering, provided that no Offering shall exceed 27 months in duration. Unless the Administrator otherwise determines, each Offering will be divided into three equal Purchase Periods. 

  
 2 

 3. Eligibility. All individuals classified as employees on the payroll records of the
Company and each Designated Company are eligible to participate in any one or more of the Offerings under the Plan, provided that as of the first day of the applicable Offering (the “Offering Date”) they have completed at least 30 days of
employment, unless the exclusion of employees who do not meet this requirement is not permissible under applicable law. Notwithstanding any other provision herein, individuals who are not contemporaneously classified as employees of the Company or a
Designated Company for purposes of the Company’s or applicable Designated Company’s payroll system are not considered to be eligible employees of the Company or any Designated Company and shall not be eligible to participate in the Plan.
In the event any such individuals are reclassified as employees of the Company or a Designated Company for any purpose, including, without limitation, common law or statutory employees, by any action of any third party, including, without
limitation, any government agency, or as a result of any private lawsuit, action or administrative proceeding, such individuals shall, notwithstanding such reclassification, remain ineligible for participation. Notwithstanding the foregoing, the
exclusive means for individuals who are not contemporaneously classified as employees of the Company or a Designated Company on the Company’s or Designated Company’s payroll system to become eligible to participate in this Plan is through
an amendment to this Plan, duly executed by the Company, which specifically renders such individuals eligible to participate herein. 
 4.
Participation. 
 (a) Participants on Effective Date. Each eligible employee as of the Registration Date shall be deemed to be
a Participant at such time. If an eligible employee is deemed to be a Participant pursuant to this Section 4(a), such individual shall be deemed not to 

  
 3 

 
have authorized payroll deductions or other contributions and shall not purchase any Common Stock hereunder unless he or she thereafter authorizes payroll deductions or other contributions by
submitting an enrollment form (in the manner described in Section 4(c)) within 90 days after the commencement of the Initial Offering. If such a Participant does not authorize payroll deductions or other contributions by submitting an
enrollment form by such deadline (or such other deadline as determined by the Administrator), that Participant will be deemed to have withdrawn from the Plan. 

(b) Participants in Subsequent Offerings. An eligible employee who is not a Participant on any Offering Date may participate in such
Offering by submitting an enrollment form in a manner determined by the Company at least 15 business days before the Offering Date (or by such other deadline as shall be established by the Administrator for the Offering). 

(c) Enrollment. The enrollment form will (a) state a whole percentage (unless the Administrator determines in advance of an
Offering to require that a fixed amount be specified in lieu of a percentage) to be contributed from an eligible employee’s Compensation (as defined in Section 11) per pay period, (b) authorize the purchase of Common Stock in each
Offering in accordance with the terms of the Plan and (c) specify the exact name or names in which shares of Common Stock purchased for such individual are to be issued pursuant to Section 10. An employee who does not enroll in accordance
with these procedures will be deemed to have waived the right to participate. Unless a Participant files a new enrollment form or withdraws from the Plan, such Participant’s contributions and purchases will continue at the same percentage of
Compensation for future Offerings, provided he or she remains eligible. 
 (d) Notwithstanding the foregoing, participation in the Plan will
neither be permitted nor be denied contrary to the requirements of the Code and any applicable law. 

  
 4 

 5. Employee Contributions. Each eligible employee may authorize payroll deductions at a
minimum of 1 percent up to a maximum of 15 percent of such employee’s Compensation for each pay period; provided, however, that if payroll deductions are not permitted or problematic under applicable law or for administrative reasons,
the Company, in its discretion, may allow eligible employees to contribute to the Plan by other means. The Company will maintain book accounts showing the amount of payroll deductions or other contributions made by each Participant for each Purchase
Period. No interest will accrue or be paid on payroll deductions or other contributions, unless required under applicable law. 
 6.
Contribution Changes. Except in the event of a Participant increasing his or her contributions from 0 percent during the Initial Offering as specified in Section 4(a) or as may be determined by the Administrator in advance of an
Offering, a Participant may not increase or decrease his or her contributions during any Offering, but may increase or decrease his or her contributions with respect to the next Offering (subject to the limitations of Section 5) by filing a new
enrollment form at least 15 business days before the next Offering Date (or by such other deadline as shall be established by the Administrator for the Offering). The Administrator may, in advance of any Offering, establish rules permitting a
Participant to increase, decrease or terminate his or her contributions during an Offering. 
 7. Withdrawal. A Participant may
withdraw from participation in the Plan by delivering a written notice of withdrawal in a manner determined by the Administrator. The Participant’s withdrawal will be effective as of the next business day. Following a Participant’s
withdrawal, the Company will promptly refund such individual’s entire account balance under the Plan to him or her (after payment for any Common Stock purchased before the effective date of withdrawal). Partial withdrawals are not permitted.
Such an employee may not begin participation again during the remainder of the Offering, but may enroll in a subsequent Offering in accordance with Section 4. 

  
 5 

 8. Grant of Options. On each Offering Date, the Company will grant to each eligible
employee who is then a Participant in the Plan an option (“Option”) to purchase on the last day of a Purchase Period (an “Exercise Date”), at the Option Price hereinafter provided for, the lowest of (a) a number of shares of
Common Stock determined by dividing such Participant’s accumulated contributions on such Exercise Date by the lower of (i) 85 percent of the Fair Market Value of the Common Stock on the Offering Date, or (ii) 85 percent of the Fair
Market Value of the Common Stock on the Exercise Date, (b) 1,500 shares; or (c) such other lesser maximum number of shares as shall have been established by the Administrator in advance of the Offering; provided, however, that such Option
shall be subject to the limitations set forth in the Plan. Each Participant’s Option shall be exercisable only to the extent of such Participant’s accumulated payroll deductions on the Exercise Date. The purchase price for each share
purchased under each Option (the “Option Price”) will be 85 percent of the Fair Market Value of the Common Stock on the Offering Date or the Exercise Date, whichever is less. 

Notwithstanding the foregoing, no Participant may be granted an option hereunder if such Participant, immediately after the option was
granted, would be treated as owning stock possessing 5 percent or more of the total combined voting power or value of all classes of stock of the Company or any Parent or Subsidiary (as defined in Section 11). For purposes of the preceding
sentence, the attribution rules of Section 424(d) of the Code shall apply in determining the stock ownership of a Participant, and all stock which the Participant has a contractual right to purchase shall be treated as stock owned by the
Participant. In addition, no Participant may be granted an Option which permits his or her rights to purchase stock under the Plan, and any other 

  
 6 

 
employee stock purchase plan of the Company and its Parents and Subsidiaries, to accrue at a rate which exceeds $25,000 of the fair market value of such stock (determined on the option grant date
or dates) for each calendar year in which the Option is outstanding at any time. The purpose of the limitation in the preceding sentence is to comply with Section 423(b)(8) of the Code and shall be applied taking Options into account in the
order in which they were granted. 
 9. Exercise of Option and Purchase of Shares. Each employee who continues to be a Participant in
the Plan on an Exercise Date shall be deemed to have exercised his or her Option on such date and shall acquire from the Company such number of whole shares of Common Stock reserved for the purpose of the Plan as his or her accumulated contributions
on such date will purchase at the Option Price, subject to any other limitations contained in the Plan; provided that, with respect to the Initial Offering, the exercise of each Option shall be conditioned on the closing of the Company’s
Initial Public Offering on or before the first Exercise Date. Any amount remaining in a Participant’s account after the purchase of shares on an Exercise Date of an Offering solely by reason of the inability to purchase a fractional share will
be carried forward to the next Purchase Period and, if such Exercise Date is the final Exercise Date of an Offering, will be carried forward to the next Offering; any other balance remaining in a Participant’s account at the end of an Offering
will be refunded to the Participant promptly. 
 If a Participant has more than one Option outstanding under the Plan, unless he or she
otherwise indicates in agreements or notices delivered hereunder: (i) each agreement or notice delivered by that Participant shall be deemed to apply to all of his or her Options under the Plan, and (ii) an Option with a lower Option Price
(or an earlier granted Option, if different Options have identical Option Prices) shall be exercised to the fullest possible extent before an Option with a higher Option Price (or a later granted Option if different Options have identical Option
Prices) shall be exercised. 

  
 7 

 10. Issuance of Certificates. Certificates, or book entries for uncertificated shares,
representing shares of Common Stock purchased under the Plan may be issued only in the name of the employee or, if permitted by the Administrator, in the name of the employee and another person of legal age as joint tenants with rights of
survivorship, or in the name of a broker authorized by the employee to be his, her or their, nominee for such purpose. 
 11.
Definitions. The term “Affiliate” means any entity that is directly or indirectly controlled by the Company which does not meet the definition of a Subsidiary below, as determined by the Administrator, whether
now or hereafter existing. 
 The term “Compensation” means the amount of total cash compensation, prior to salary reduction
pursuant to Sections 125, 132(f) or 401(k) of the Code, including base pay, overtime, commissions, and incentive or bonus awards, but excluding allowances and reimbursements for expenses such as relocation allowances or travel expenses, income
or gains on the exercise of Company stock options, and similar items. The Administrator shall have the discretion to determine the application of this definition to Participants outside the United States. 

The term “Designated Company” means any present or future Affiliate or Subsidiary (as defined below) that has been designated by the
Board to participate in the Plan. The Board may so designate any Affiliate or Subsidiary, or revoke any such designation, at any time and from time to time, either before or after the Plan is approved by the stockholders and may further designate
such companies as participating in the 423 Component or the Non-423 Component. For purposes of the 423 Component, only Subsidiaries may be Designated Companies. 

  
 8 

 The term “Fair Market Value of the Common Stock” on any given date means the fair
market value of the Common Stock determined in good faith by the Administrator; provided, however, that if the Common 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 the closing price on such date. If there is no closing price for such date, the determination shall be made by
reference to the last date preceding such date for which there is a closing price. Notwithstanding the foregoing, if the date for which Fair Market Value of the Common Stock is determined is the first day when trading prices for the Common Stock are
reported on NASDAQ or another national securities exchange, the Fair Market Value of the Common Stock 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. 
 The term “Initial Public Offering” means the the first offer and sale by the Company of its Common
Stock in an underwritten, firm-commitment public offering. 
 The term “Parent” means a “parent corporation” with
respect to the Company, as defined in Section 424(e) of the Code. 
 The term “Participant” means an individual who is
eligible as determined in Section 3 and who has complied with the provisions of Section 4. 
 The term “Purchase Period”
means a period of time specified within an Offering beginning on the Offering Date or on the next day following an Exercise Date within an Offering and ending on an Exercise Date. An Offering may consist of one or more Purchase Periods. 

  
 9 

 The term “Registration Date” means the date 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. 
 The
term “Subsidiary” means a “subsidiary corporation” with respect to the Company, as defined in Section 424(f) of the Code. 

12. Rights on Termination of Employment. Unless otherwise required by applicable law, if a Participant’s employment terminates for
any reason before the Exercise Date for any Offering, no contributions will be taken from any pay due and owing to the Participant and the balance in the Participant’s account will be paid to such Participant or, in the case of such
Participant’s death, if permitted by the Administrator, to his or her designated beneficiary as if such Participant had withdrawn from the Plan under Section 7. An employee will be deemed to have terminated employment, for this purpose, if
the corporation that employs him or her, having been a Designated Company, ceases to be an Affiliate or Subsidiary, as applicable, or if the employee is transferred to any corporation other than the Company or a Designated Company. An employee will
not be deemed to have terminated employment for this purpose, if the employee is on 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 reemployment 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 provides in writing. 

13. Optionees Not Stockholders. Neither the granting of an Option to a Participant nor the deductions from his or her pay or other
contributions shall deem such Participant to be a holder of the shares of Common Stock covered by an Option under the Plan until such shares have been purchased by and issued to him or her. 

  
 10 

 14. Rights Not Transferable. Rights under the Plan are not transferable by a Participant
other than by will or the laws of descent and distribution, and are exercisable during the Participant’s lifetime only by the Participant. 

15. Application of Funds. All funds received or held by the Company under the Plan may be combined with other corporate funds and may
be used for any corporate purpose, unless otherwise required under applicable law. 
 16. Adjustment in Case of Changes Affecting Common
Stock. In the event of a subdivision of outstanding shares of Common Stock, the payment of a dividend in Common Stock or any other change affecting the Common Stock, the number of shares approved for the Plan and the share limitation set forth
in Section 8 shall be equitably or proportionately adjusted to give proper effect to such event. 
 17. Amendment of the Plan.
The Board may at any time and from time to time amend the Plan in any respect, except that without the approval within 12 months of such Board action by the stockholders, no amendment shall be made increasing the number of shares approved for the
Plan or making any other change that would require stockholder approval in order for the 423 Component of the Plan, as amended, to qualify as an “employee stock purchase plan” under Section 423(b) of the Code. 

18. Insufficient Shares. If the total number of shares of Common Stock that would otherwise be purchased on any Exercise Date plus the
number of shares purchased under previous Offerings under the Plan exceeds the maximum number of shares issuable under the Plan, the shares then available shall be apportioned among Participants in proportion to the amount of payroll deductions
accumulated on behalf of each Participant that would otherwise be used to purchase Common Stock on such Exercise Date. 

  
 11 

 19. Termination of the Plan. The Plan may be terminated at any time by the Board. Upon
termination of the Plan, all amounts in the accounts of Participants shall be promptly refunded. The Plan shall automatically terminate on the ten year anniversary of the Registration Date. 

20. Governmental Regulations. The Company’s obligation to sell and deliver Common Stock under the Plan is subject to obtaining all
governmental approvals required in connection with the authorization, issuance, or sale of such stock. 
 21. Governing Law. This
Plan and all Options 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. 

22. Issuance of Shares. Shares may be issued upon exercise of an Option from authorized but unissued Common Stock, from shares held in
the treasury of the Company, or from any other proper source. 
 23. Tax Withholding. Participation in the Plan is subject to any
minimum required tax withholding on income of the Participant in connection with the Plan. Each Participant agrees, by entering the Plan, that the Company and its Affiliates and Subsidiaries shall have the right to deduct any such taxes from any
payment of any kind otherwise due to the Participant, including shares issuable under the Plan. 
 24. Notification Upon Sale of
Shares. Each Participant who is subject to tax in the United States with respect to his or her participation in the Plan agrees, by entering the Plan, to give the Company prompt notice of any disposition of shares purchased under the Plan where
such disposition occurs within two years after the date of grant of the Option pursuant to which such shares were purchased. 

  
 12 

 25. Effective Date and Approval of Shareholders. The Plan shall take effect on the
Registration Date, subject to approval by the holders of a majority of the votes cast at a meeting of stockholders at which a quorum is present or by written consent of the stockholders. 

  
 13

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