Document:

Indemnification Agreement dated as of July 29, 2008

 Exhibit 10.2 
 Execution Copy 
 INDEMNIFICATION AGREEMENT 
 This Agreement is made as of the 29th day of July, 2008, by and between Vonage Holdings Corp., a Delaware corporation (the “Corporation), and Marc
P. Lefar (the “Indemnitee”), a director or officer of the Corporation. 
 WHEREAS, it is essential to the Corporation to retain and
attract as directors and officers the most capable persons available, and 
 WHEREAS, the substantial increase in corporate litigation
subjects directors and officers to expensive litigation risks at the same time that the availability of directors’ and officers’ liability insurance has been severely limited, and 
 WHEREAS, it is now and has always been the express policy of the Corporation to indemnify its directors and officers, and 
 WHEREAS, the Indemnitee does not regard the protection available under the Corporation’s Certificate of Incorporation and insurance as adequate in
the present circumstances, and may not be willing to serve or continue to serve as a director or officer without adequate protection, and 
 WHEREAS, the Corporation desires the Indemnitee to serve, or continue to serve, as a director or officer of the Corporation. 
 NOW
THEREFORE, the Corporation and the Indemnitee do hereby agree as follows: 
 1. Agreement to Serve. The Indemnitee agrees to serve or
continue to serve as a director or officer of the Corporation for so long as the Indemnitee is duly elected or appointed or until such time as the Indemnitee tenders a resignation in writing. 
 2. Definitions. As used in this Agreement: 
 (a) The term “Change in Control” shall mean, and shall be deemed to have occurred if, on or after the date of this Agreement, (i) any “person” (as such term is used in Section 13(d) and
14(d) of the Securities Exchange Act of 1934, as amended), other than a trustee or other fiduciary holding securities under an employee benefit plan of the Corporation acting in such capacity or a corporation owned directly or indirectly by the
stockholders of the Corporation in substantially the same proportions as their ownership of stock of the Corporation, becomes the “beneficial owner” (as defined in Rule 13d-3 under said Act), directly or indirectly, of securities of the
Corporation representing more than 50% of the total voting power represented by the Corporation’s then outstanding Voting Securities (as defined below), (ii) during any period of two consecutive years, individuals who at the beginning of
such period constitute the Board of Directors of the Corporation and any new director whose election by the Board of Directors or nomination for election by the Corporation’s stockholders was approved by a vote of at least two thirds
(2/3) of the directors then still in office who either were directors at the beginning of the period or whose election or nomination for election was previously so 

 
approved, cease for any reason to constitute a majority thereof, or (iii) the stockholders of the Corporation approve a merger or consolidation of the
Corporation with any other entity other than a merger or consolidation which would result in the Voting Securities of the Corporation outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being
converted into Voting Securities of the surviving entity) at least 80% of the total voting power represented by the Voting Securities of the Corporation or such surviving entity outstanding immediately after such merger or consolidation, or the
stockholders of the Corporation approve a plan of complete liquidation of the Corporation or an agreement for the sale or disposition by the Corporation of (in one transaction or a series of related transactions) all or substantially all of the
Corporation’s assets. 
 (b) The term “Corporate Status” shall mean the status of a person who is or was, or
has agreed to become, a director or officer of the Corporation, or is or was serving, or has agreed to serve, at the request of the Corporation, as a director, officer, fiduciary, partner, trustee, member, employee or agent of, or in a similar
capacity with, another corporation, partnership, joint venture, trust or other enterprise (including any employee benefit plan). 
 (c) References to the “Corporation” shall include, in addition to Vonage Holdings Corp., any constituent corporation (including any constituent of a constituent) absorbed in a consolidation or merger to which Vonage Holdings Corp.
(or any of its wholly owned subsidiaries) is a party which, if its separate existence had continued, would have had the power and authority to indemnify its directors, officers, employees, agents or fiduciaries, so that if the Indemnitee is or was a
director, officer, employee, agent or fiduciary of such constituent corporation, or is or was serving at the request of such constituent corporation as a director, officer, employee, agent or fiduciary of another corporation, partnership, joint
venture, employee benefit plan, trust or other enterprise, the Indemnitee shall stand in the same position under the provisions of this Agreement with respect to the resulting or surviving corporation as the Indemnitee would have with respect to
such constituent corporation if its separate existence had continued. 
 (d) The term “Expenses” shall include,
without limitation, attorneys’ fees, retainers, court costs, transcript costs, fees and expenses of experts, travel expenses, duplicating costs, printing and binding costs, telephone charges, postage, delivery service fees and other
disbursements or expenses of the types customarily incurred in connection with actions, suits, proceedings, alternative dispute resolution mechanisms, hearings, inquiries or investigations, including any costs or expenses incurred defending, being a
witness in or participating in, or preparing to defend, to be a witness in or to participate in, such actions, suits, proceedings, alternative dispute resolution mechanisms, hearings, inquiries or investigations, including any federal, state, local
or foreign taxes imposed on the Indemnitee as a result of actual or deemed receipt of payments for the foregoing, but shall not include the amount of judgments, fines or penalties against the Indemnitee or amounts paid in settlement in connection
with such matters. 
 (e) References to “other enterprise” shall include employee benefit plans; references to
“fines” shall include any excise tax assessed with respect to any employee benefit plan; references to “serving at the request of the Corporation” shall include any service as a director, officer, employee, agent or fiduciary of
the Corporation which imposes duties on, or involves services by, such director, officer, employee, agent or fiduciary with respect to an 

  

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employee benefit plan, its participants or beneficiaries; and a person who acted in good faith and in a manner such person reasonably believed to be in the
interests of the participants and beneficiaries of an employee benefit plan shall be deemed to have acted in a manner “not opposed to the best interests of the Corporation” as referred to in this Agreement. 
 (f) The term “Proceeding” shall include any threatened, pending or completed action, suit, arbitration, alternative dispute
resolution mechanism, hearing, inquiry, investigation or other proceeding, whether brought by or in the right of the Corporation or otherwise and whether of a civil, criminal, administrative or investigative nature, and any appeal therefrom.

 (g) The term “Special Independent Counsel” shall mean a law firm, or a member of a law firm, that is experienced
in matters of corporation law and neither currently is, nor in the past three years has been, retained to represent: (i) the Corporation or the Indemnitee in any matter material to either such party or (ii) any other party to the
Proceeding giving rise to a claim for indemnification hereunder. Notwithstanding the foregoing, the term “Special Independent Counsel” shall not include any person who, under the applicable standards of professional conduct then
prevailing, would have a conflict of interest in representing either the Corporation or the Indemnitee in an action to determine the Indemnitee’s rights under this Agreement. 
 (h) The term “Voting Securities” shall mean any securities of the Corporation that vote generally in the election of directors.

 3. Indemnity of Indemnitee. Subject to Sections 6, 7 and 9, the Corporation shall indemnify the Indemnitee in connection with any
Proceeding as to which the Indemnitee is, was or is threatened to be made a party (or is a witness or participant in or otherwise involved with) by reason of the Indemnitee’s Corporate Status, to the fullest extent permitted by law (as such may
be amended from time to time). To the extent that a change in applicable law (whether by statute or judicial decision) permits greater indemnification than would be afforded currently hereunder, the Indemnitee shall enjoy the greater benefits so
afforded by such change without any further action by the Corporation. In furtherance of the foregoing and without limiting the generality thereof: 
 (a) Indemnification in Third-Party Proceedings. The Corporation shall indemnify the Indemnitee in accordance with the provisions of this Section 3(a) if the Indemnitee was or is a party to or threatened to
be made a party to or otherwise involved in any Proceeding (other than a Proceeding by or in the right of the Corporation to procure a judgment in its favor or a Proceeding referred to in Section 6 below) by reason of the Indemnitee’s
Corporate Status or by reason of any action alleged to have been taken or omitted in connection therewith, against all Expenses, liabilities, losses, judgments, fines, ERISA taxes or penalties and amounts paid in settlement actually and reasonably
incurred by or on behalf of the Indemnitee in connection with such Proceeding, if the Indemnitee acted in good faith and in a manner which the Indemnitee reasonably believed to be in, or not opposed to, the best interests of the Corporation and,
with respect to any criminal Proceeding, had no reasonable cause to believe that his or her conduct was unlawful. 
  

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 (b) Indemnification in Proceedings by or in the Right of the Corporation. The
Corporation shall indemnify the Indemnitee in accordance with the provisions of this Section 3(b) if the Indemnitee was or is a party to or threatened to be made a party to or otherwise involved in any Proceeding by or in the right of the
Corporation to procure a judgment in its favor by reason of the Indemnitee’s Corporate Status or by reason of any action alleged to have been taken or omitted in connection therewith, against all Expenses and, to the extent permitted by law,
amounts paid in settlement actually and reasonably incurred by or on behalf of the Indemnitee in connection with such Proceeding, if the Indemnitee acted in good faith and in a manner which the Indemnitee reasonably believed to be in, or not opposed
to, the best interests of the Corporation, except that, if applicable law so provides, no indemnification shall be made under this Section 3(b) in respect of any claim, issue or matter as to which the Indemnitee shall have been adjudged to be
liable to the Corporation, unless, and only to the extent, that the Court of Chancery of Delaware or the court in which such action or suit was brought shall determine upon application that, despite the adjudication of such liability but in view of
all the circumstances of the case, the Indemnitee is fairly and reasonably entitled to indemnity for such Expenses as the Court of Chancery or such other court shall deem proper. 
 4. Indemnification of Expenses of Successful Party. Notwithstanding any other provision of this Agreement, to the extent that the Indemnitee has
been successful, on the merits or otherwise, in defense of any Proceeding or in defense of any claim, issue or matter therein (other than a Proceeding referred to in Section 6), the Indemnitee shall be indemnified against all Expenses actually
and reasonably incurred by or on behalf of the Indemnitee in connection therewith. Without limiting the foregoing, if any Proceeding or any claim, issue or matter therein is disposed of, on the merits or otherwise (including a disposition without
prejudice), without (i) the disposition being adverse to the Indemnitee, (ii) an adjudication that the Indemnitee was liable to the Corporation, (iii) a plea of guilty or nolo contendere by the Indemnitee, (iv) an
adjudication that the Indemnitee did not act in good faith and in a manner the Indemnitee reasonably believed to be in or not opposed to the best interests of the Corporation, and (v) with respect to any criminal proceeding, an adjudication
that the Indemnitee had reasonable cause to believe his or her conduct was unlawful, the Indemnitee shall be considered for the purposes hereof to have been wholly successful with respect thereto. 
 5. Indemnification for Expenses of a Witness. To the extent that the Indemnitee is, by reason of the Indemnitee’s Corporate Status, a witness
in any Proceeding to which the Indemnitee is not a party, the Indemnitee shall be indemnified against all Expenses actually and reasonably incurred by or on behalf of the Indemnitee in connection therewith. 
 6. Exceptions to Right of Indemnification. Notwithstanding anything to the contrary in this Agreement, except as set forth in Section 10, the
Corporation shall not indemnify the Indemnitee in connection with a Proceeding (or part thereof) initiated by the Indemnitee unless (a) the initiation thereof was approved by the Board of Directors of the Corporation or (b) the Proceeding
was commenced following a Change in Control. Notwithstanding anything to the contrary in this Agreement, the Corporation shall not indemnify the Indemnitee to the extent the Indemnitee is reimbursed from the proceeds of insurance, and in the event
the Corporation makes any indemnification payments to the Indemnitee and the Indemnitee is subsequently 

  

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reimbursed from the proceeds of insurance, the Indemnitee shall promptly refund such indemnification payments to the Corporation to the extent of such
insurance reimbursement. 
 7. Notification and Defense of Claim. As a condition precedent to the Indemnitee’s right to be
indemnified, the Indemnitee must notify the Corporation in writing as soon as practicable of any Proceeding for which indemnity will or could be sought. With respect to any Proceeding of which the Corporation is so notified, the Corporation will be
entitled to participate therein at its own expense and/or to assume the defense thereof at its own expense, with legal counsel reasonably acceptable to the Indemnitee. After notice from the Corporation to the Indemnitee of its election so to assume
such defense, the Corporation shall not be liable to the Indemnitee for any legal or other expenses subsequently incurred by the Indemnitee in connection with such Proceeding, other than as provided below in this Section 7. The Indemnitee shall
have the right to employ his or her own counsel in connection with such Proceeding, but the fees and expenses of such counsel incurred after notice from the Corporation of its assumption of the defense thereof shall be at the expense of the
Indemnitee unless (i) the employment of counsel by the Indemnitee has been authorized by the Corporation, (ii) counsel to the Indemnitee shall have reasonably concluded that there may be a conflict of interest or position on any
significant issue between the Corporation and the Indemnitee in the conduct of the defense of such Proceeding or (iii) the Corporation shall not in fact have employed counsel to assume the defense of such Proceeding, in each of which cases the
fees and expenses of counsel for the Indemnitee shall be at the expense of the Corporation, except as otherwise expressly provided by this Agreement. The Corporation shall not be entitled, without the consent of the Indemnitee, to assume the defense
of any claim brought by or in the right of the Corporation or as to which counsel for the Indemnitee shall have reasonably made the conclusion provided for in clause (ii) above. The Corporation shall not be required to indemnify the Indemnitee
under this Agreement for any amounts paid in settlement of any Proceeding effected without its written consent. The Corporation shall not settle any Proceeding in any manner that would impose any penalty or limitation on the Indemnitee without the
Indemnitee’s written consent. Neither the Corporation nor the Indemnitee will unreasonably withhold or delay their consent to any proposed settlement. 
 8. Advancement of Expenses. In the event that the Corporation does not assume the defense pursuant to Section 7 of any Proceeding of which the Corporation receives notice under this Agreement, any Expenses
actually and reasonably incurred by or on behalf of the Indemnitee in defending such Proceeding shall be paid by the Corporation in advance of the final disposition of such Proceeding; provided, however, that the payment of such Expenses incurred by
or on behalf of the Indemnitee in advance of the final disposition of such Proceeding shall be made only upon receipt of an undertaking by or on behalf of the Indemnitee to repay all amounts so advanced in the event that it shall ultimately be
determined by final judicial decision from which there is no further right of appeal that the Indemnitee is not entitled to be indemnified by the Corporation as authorized in this Agreement. Such undertaking shall be accepted without reference to
the financial ability of the Indemnitee to make repayment. Any advances and undertakings to repay pursuant to this Section 8 shall be unsecured and interest-free. The parties agree that for the purposes of any advancement of Expenses for which
the Indemnitee has made written demand to the Corporation in accordance with this Agreement, all Expenses included in 

  

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such advancement that are certified by affidavit of the Indemnitee’s counsel as being reasonable shall be presumed conclusively to be reasonable.

 9. Procedures. 
 (a) In order to obtain indemnification or advancement of Expenses pursuant to this Agreement, the Indemnitee shall submit to the Corporation a written request, including in such request such documentation and information as is reasonably
available to the Indemnitee and is reasonably necessary to determine whether and to what extent the Indemnitee is entitled to indemnification or advancement of Expenses. Subject to Section 29 hereof, any such indemnification or advancement of
Expenses shall be made as soon as practicable after written demand by the Indemnitee therefor is presented to the Corporation, and in any event within (i) in the case of indemnification under Sections 4, 5 or 9(d) or advancement of Expenses, 20
business days after receipt by the Corporation of the written request of the Indemnitee, or (ii) in the case of all other indemnification, 45 business days after receipt by the Corporation of the written request of the Indemnitee, unless with
respect to requests under this clause (ii) the Corporation determines, by clear and convincing evidence, within the 45 business-day period referred to above that the Indemnitee did not meet the applicable standard of conduct. Such
determination, and any determination that advanced Expenses must be repaid to the Corporation, shall be made as follows: 
 (x) if a Change in Control shall have occurred, by Special Independent Counsel in a written opinion to the Board of Directors of the Corporation, a copy of which shall be delivered to the Indemnitee (unless the Indemnitee shall request that
such determination be made by the Board of Directors of the Corporation, in which case the determination shall be made in the manner provided below in clauses (y)(1) or (y)(2)). 
 (y) in all other cases, in the discretion of the Board of Directors of the Corporation, (1) by a majority vote of the directors of
the Corporation consisting of persons who are not at that time parties to the Proceeding (“disinterested directors”), whether or not a quorum, (2) by a committee of disinterested directors designated by a majority vote of
disinterested directors, whether or not a quorum, (3) if there are no disinterested directors, or if the disinterested directors so direct, by independent legal counsel in a written opinion to the Board, or (4) by the stockholders of the
Corporation. 
 (b) In the event that a Change in Control shall have occurred and the determination of entitlement to
indemnification is to be made by Special Independent Counsel, the Special Independent Counsel shall be selected as provided in this Section 9(b). The Special Independent Counsel shall be selected by the Indemnitee, unless the Indemnitee shall
request that such selection be made by the Board of Directors of the Corporation. The party making the determination shall give written notice to the other party advising it of the identity of the Special Independent Counsel so selected. The party
receiving such notice may, within seven days after such written notice of selection shall have been given, deliver to the other party a written objection to such selection. Such objection may be asserted only on the ground that the Special
Independent Counsel so selected does not meet the requirements of “Special Independent Counsel” as defined in Section 2, and the objection shall set forth with particularity the factual basis of such assertion. Absent a proper and
timely objection, the person so selected shall act as 

  

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Special Independent Counsel. If a written objection is made, the Special Independent Counsel so selected may not serve as Special Independent Counsel unless
and until a court has determined that such objection is without merit. If, within 20 business days after submission by the Indemnitee of a written request for indemnification, no Special Independent Counsel shall have been selected or if selected,
shall have been objected to, in accordance with this paragraph either the Corporation or the Indemnitee may petition the Court of Chancery of the State of Delaware or other court of competent jurisdiction for resolution of any objection which shall
have been made by the Corporation or the Indemnitee to the other’s selection of Special Independent Counsel and/or for the appointment as Special Independent Counsel of a person selected by the court or by such other person as the court shall
designate, and the person with respect to whom an objection is favorably resolved or the person so appointed shall act as Special Independent Counsel. The Corporation shall pay the reasonable and necessary fees and expenses of Special Independent
Counsel incurred in connection with its acting in such capacity. The Corporation shall pay any and all reasonable and necessary fees and expenses incident to the procedures of this paragraph, regardless of the manner in which such Special
Independent Counsel was selected or appointed. Upon the due commencement of any judicial proceeding pursuant to Section 10 of this Agreement, any Special Independent Counsel shall be discharged and relieved of any further responsibility in such
capacity (subject to the applicable standards of professional conduct then prevailing). 
 (c) The termination of any
Proceeding by judgment, order, settlement, conviction or upon a plea of nolo contendere or its equivalent, shall not, of itself, create a presumption that the Indemnitee did not act in good faith and in a manner that the Indemnitee
reasonably believed to be in, or not opposed to, the best interests of the Corporation, and, with respect to any criminal Proceeding, had reasonable cause to believe that his or her conduct was unlawful. 
 (d) The Indemnitee shall cooperate with the person, persons or entity making such determination with respect to the Indemnitee’s
entitlement to indemnification, including providing to such person, persons or entity upon reasonable advance request any documentation or information which is not privileged or otherwise protected from disclosure and which is reasonably available
to the Indemnitee and reasonably necessary to such determination. Any Expenses actually and reasonably incurred by the Indemnitee in so cooperating shall be borne by the Corporation (irrespective of the determination as to the Indemnitee’s
entitlement to indemnification), and the Corporation hereby indemnifies the Indemnitee therefrom. 
 10. Remedies. The right to
indemnification or advancement of Expenses as provided by this Agreement shall be enforceable by the Indemnitee in any court of competent jurisdiction if the Corporation denies such request, in whole or in part, or if no disposition thereof is made
within the applicable periods referred to in Section 9. Unless otherwise required by law, the burden of proving that indemnification or advancement of Expenses is not appropriate shall be on the Corporation. Neither the failure of the
Corporation to have made a determination prior to the commencement of such action that indemnification is proper in the circumstances because the Indemnitee has met the applicable standard of conduct, nor an actual determination by the Corporation
that the Indemnitee has not met such applicable standard of conduct, shall be a defense to the action or create a presumption that the Indemnitee has not met the applicable 

  

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standard of conduct. Indemnitee’s Expenses (including attorneys’ fees) reasonably incurred in connection with any action instituted by the
Indemnitee to enforce or interpret its right to indemnification, in whole or in part, shall also be indemnified by the Corporation, regardless of whether the Indemnitee is ultimately successful in such action, unless as a part of such action a court
having jurisdiction over such action makes a final judicial determination (as to which all rights of appeal therefrom have been exhausted or lapsed) that each of the material assertions made by the Indemnitee as a basis for such action was not made
in good faith or was frivolous; provided, however, that until such final judicial determination is made, the Indemnitee shall be entitled under Section 8 to advancement of Expenses with respect to such action. 
 11. Partial Indemnification. If the Indemnitee is entitled under any provision of this Agreement to indemnification by the Corporation for some or
a portion of the Expenses, liabilities, losses, judgments, fines, ERISA taxes or penalties or amounts paid in settlement actually and reasonably incurred by or on behalf of the Indemnitee in connection with any Proceeding but not, however, for the
total amount thereof, the Corporation shall nevertheless indemnify the Indemnitee for the portion of such Expenses, liabilities, losses, judgments, fines, ERISA taxes or penalties or amounts paid in settlement to which the Indemnitee is entitled.

 12. Subrogation. In the event of any payment under this Agreement, the Corporation shall be subrogated to the extent of such
payment to all of the rights of recovery of the Indemnitee, who shall execute all papers required and take all action necessary to secure such rights, including execution of such documents as are necessary to enable the Corporation to bring suit to
enforce such rights. 
 13. Contribution. 
 (a) If the indemnification provided for in this Agreement for any reason is held by a court of competent jurisdiction to be unavailable to
the Indemnitee in respect of any Expenses, losses, claims, damages or liabilities referred to herein, then the Corporation, in lieu of indemnifying the Indemnitee hereunder, shall contribute to the amount paid or payable by the Indemnitee as a
result of such Expenses, losses, claims, damages or liabilities (i) in such proportion as is appropriate to reflect the relative benefits received by the Corporation and the Indemnitee, or (ii) if the allocation provided by clause
(i) above is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Corporation and the Indemnitee in connection
with the action or inaction which resulted in such Expenses, losses, claims, damages or liabilities, as well as any other relevant equitable considerations. In connection with the registration of the Corporation’s securities, the relative
benefits received by the Corporation and the Indemnitee shall be deemed to be in the same respective proportions that the net proceeds from the offering (before deducting expenses) received by the Corporation and the Indemnitee, in each case as set
forth in the table on the cover page of the applicable prospectus, bear to the aggregate public offering price of the securities so offered. The relative fault of the Corporation and the Indemnitee shall be determined by reference to, among other
things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Corporation or the Indemnitee and the parties’ relative intent,
knowledge, access to information and opportunity to correct or prevent such statement or omission. 
  

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 (b) The Corporation and the Indemnitee agree that it would not be just and equitable if
contribution pursuant to this Section 13 were determined by pro rata or per capita allocation or by any other method of allocation which does not take account of the equitable considerations referred to in the immediately preceding paragraph.
In connection with the registration of the Corporation’s securities, in no event shall the Indemnitee be required to contribute any amount under this Section 13 in excess of the lesser of (i) that proportion of the total securities
sold under such registration statement which is being sold by the Indemnitee or (ii) the proceeds received by the Indemnitee from its sale of securities under such registration statement. No person found guilty of fraudulent misrepresentation
(within the meaning of Section 10(f) of the Securities Act of 1933, as amended) shall be entitled to contribution from any person who was not found guilty of such fraudulent misrepresentation. 
 14. Notice to Insurers. If, at the time of the receipt by the Corporation of a notice of a claim for indemnification or advancement of Expenses by
the Indemnitee, the Corporation has liability insurance in effect which may cover such claim, the Corporation shall give prompt notice of the commencement of such claim to the insurers in accordance with the procedures set forth in the respective
policies. The Corporation shall thereafter take all necessary or desirable action to cause such insurers to pay, on behalf of the Indemnitee, all amounts payable as a result of such claim in accordance with the terms of such polices. 
 15. Mutual Acknowledgment. Both the Corporation and the Indemnitee acknowledge that in certain instances, federal law or applicable public policy
may prohibit the Corporation from indemnifying its directors, officers, employees, agents or fiduciaries under this Agreement or otherwise. The Indemnitee understands and acknowledges that the Corporation has undertaken or may be required in the
future to undertake with the Securities and Exchange Commission to submit the question of indemnification to a court in certain circumstances for a determination of the Corporation’s right under public policy to indemnify the Indemnitee.

 16. Liability Insurance. To the extent the Corporation maintains liability insurance applicable to directors, officers, employees,
agents or fiduciaries, the Indemnitee shall be covered by such policies in such a manner as to provide the Indemnitee the same rights and benefits as are provided to the most favorably insured of the Corporation’s directors, if the Indemnitee
is a director; or of the Corporation’s officers, if the Indemnitee is not a director of the Corporation but is an officer. 
 17.
Indemnification Hereunder Not Exclusive. The indemnification and advancement of Expenses provided by this Agreement shall not be deemed exclusive of any other rights to which the Indemnitee may be entitled under the Certification of
Incorporation, the By-laws, any other agreement, any vote of stockholders or disinterested directors, the General Corporation Law of Delaware, any other law (common or statutory), or otherwise, both as to action in the Indemnitee’s official
capacity and as to action in another capacity while holding office for the Corporation. Nothing contained in this Agreement shall be deemed to prohibit the Corporation from purchasing and maintaining insurance, at its expense, to protect itself or
the Indemnitee against any expense, liability or loss incurred by it or the Indemnitee in any such capacity, or arising out of the Indemnitee’s status as such, whether or not the Indemnitee would be indemnified against such expense, liability
or loss under this Agreement; provided that the Corporation shall not be liable under this Agreement to make any payment of amounts otherwise 

  

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indemnifiable hereunder if and to the extent that the Indemnitee has otherwise actually received such payment under any insurance policy, contract, agreement
or otherwise. 
 18. No Special Rights. Nothing herein shall confer upon the Indemnitee any right to continue to serve as an officer
or director of the Corporation for any period of time or at any particular rate of compensation. 
 19. Savings Clause. If this
Agreement or any portion thereof shall be invalidated on any ground by any court of competent jurisdiction, then the Corporation shall nevertheless indemnify the Indemnitee as to Expenses, liabilities, losses, judgments, fines, ERISA taxes and
penalties and amounts paid in settlement with respect to any Proceeding to the full extent permitted by any applicable portion of this Agreement that shall not have been invalidated and to the fullest extent permitted by applicable law. 

20. Counterparts. This Agreement may be executed in any number of counterparts, each of which shall constitute the original. 
 21. Binding Effect; Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of and be enforceable by the parties
hereto and their respective successors, assigns (including any direct or indirect successor by purchase, merger, consolidation or otherwise to all or substantially all of the business or assets of the Corporation), spouses, heirs and personal and
legal representatives. The Corporation shall require and cause any successor (whether direct or indirect, and whether by purchase, merger, consolidation or otherwise) to all, substantially all, or a substantial part, of the business or assets of the
Corporation, expressly to assume and agree to perform this Agreement in the same manner and to the same extent that the Corporation would be required to perform if no such succession had taken place. This Agreement shall continue in effect
regardless of whether Indemnitee continues to serve as a director, officer, employee, agent of fiduciary (as applicable) of the Corporation or of any other enterprise at the Corporation’s request. 
 22. Headings. The headings of the paragraphs of this Agreement are inserted for convenience only and shall not be deemed to constitute part of
this Agreement or to affect the construction thereof. 
 23. Modification and Waiver. This Agreement may be amended from time to time
to reflect changes in Delaware law or for other reasons. No supplement, modification or amendment of this Agreement shall be binding unless executed in writing by both of the parties hereto. No waiver of any of the provisions of this Agreement shall
be deemed or shall constitute a waiver of any other provision hereof nor shall any such waiver constitute a continuing waiver. 
 24.
Notices. All notices, requests, demands and other communications hereunder shall be in writing and shall be deemed to have been given (i) when delivered by hand or (ii) if mailed by certified or registered mail with postage prepaid,
on the third day after the date on which it is so mailed: 
  

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	 (a)    if to the Indemnitee, to:
	  	 Marc P. Lefar
 25 Ball Mill Place
 Atlanta, Georgia 30350

		
	 (b)    if to the Corporation, to:
	  	 Vonage Holdings Corp.
 23 Main Street
 Holmdel, New Jersey 07733
 Attn: Chief Legal Officer

 or to such other address as may have been furnished to the Indemnitee by the Corporation or to the Corporation by
the Indemnitee, as the case may be. 
 25. Applicable Law. This Agreement shall be governed by, and construed and enforced in
accordance with, the laws of the State of Delaware, without regard to principles of conflicts of law. The Indemnitee may elect to have the right to indemnification or reimbursement or advancement of Expenses interpreted on the basis of the
applicable law in effect at the time of the occurrence of the event or events giving rise to the applicable Proceeding, to the extent permitted by law, or on the basis of the applicable law in effect at the time such indemnification or reimbursement
or advancement of Expenses is sought. Such election shall be made, by a notice in writing to the Corporation, at the time indemnification or reimbursement or advancement of Expenses is sought; provided, however, that if no such notice is given, and
if the General Corporation Law of Delaware is amended, or other Delaware law is enacted, to permit further indemnification of the directors and officers, then the Indemnitee shall be indemnified to the fullest extent permitted under the General
Corporation Law, as so amended, or by such other Delaware law, as so enacted. 
 26. Enforcement. The Corporation expressly confirms
and agrees that it has entered into this Agreement in order to induce the Indemnitee to continue to serve as an officer or director of the Corporation, and acknowledges that the Indemnitee is relying upon this Agreement in continuing in such
capacity. 
 27. Entire Agreement. This Agreement sets forth the entire agreement of the parties hereto in respect of the subject
matter contained herein and supersedes all prior agreements, whether oral or written, by any officer, employee or representative of any party hereto in respect of the subject matter contained herein; and any prior agreement of the parties hereto in
respect of the subject matter contained herein is hereby terminated and cancelled. For avoidance of doubt, the parties confirm that the foregoing does not apply to or limit the Indemnitee’s rights under Delaware law or the Corporation’s
Certificate of Incorporation or By-laws. 
 28. Consent to Suit. In the case of any dispute under or in connection with this
Agreement, the Indemnitee may only bring suit against the Corporation in the Court of Chancery of the State of Delaware in and for New Castle County. The Indemnitee hereby consents to the 

  

 - 11 - 

 
exclusive jurisdiction and venue of the courts of the State of Delaware in and for New Castle County, and the Indemnitee hereby waives any claim the
Indemnitee may have at any time as to forum non conveniens with respect to such venue. The Corporation shall have the right to institute any legal action arising out of or relating to this Agreement in any court of competent jurisdiction. Any
judgment entered against either of the parties in any proceeding hereunder may be entered and enforced by any court of competent jurisdiction. 
 29. Section 409A. It is intended that any indemnification payment or advancement of Expenses made hereunder shall be exempt from Section 409A of the Internal Revenue Code of 1986, as amended, and the guidance issued
thereunder (“Section 409A”) pursuant to Treasury Regulation Section 1.409A-1(b)(10). Notwithstanding the foregoing, if any indemnification payment or advancement of Expenses made hereunder shall be determined to be “nonqualified
deferred compensation” within the meaning of Section 409A, then (i) the amount of the indemnification payment or advancement of Expenses during one taxable year shall not affect the amount of the indemnification payments or
advancement of Expenses during any other taxable year, (ii) the indemnification payments or advancement of Expenses must be made on or before the last day of the Indemnitee’s taxable year following the year in which the expense was
incurred, and (iii) the right to indemnification payments or advancement of Expenses hereunder is not subject to liquidation or exchange for another benefit. 
 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed as of the day and year first above written. 
  

	
	VONAGE HOLDINGS CORP.
	
	/s/ Jeffrey A. Citron
	 Name: Jeffery A. Citron
 Title: Chairman of the Board

	
	7/29/08
	
	INDEMNITEE:
	
	/s/ Marc P. Lefar
	Marc P. Lefar

  

 - 12 -Form of Nonqualified Stock Option Agreement

 Exhibit 10.3 
 VONAGE HOLDINGS CORP. 
 2006 INCENTIVE PLAN 
 NONQUALIFIED STOCK OPTION AGREEMENT 
 “Participant”:
                                 
 “Date of Award”:
                             
 This Agreement, effective as of the Date of Award set forth above, represents the grant of Nonqualified Stock Options by Vonage Holdings Corp., a
Delaware corporation (the “Company”), to the Participant named above, pursuant to the provisions of the Vonage Holdings Corp. 2006 Incentive Plan (the “Plan”). Capitalized terms have the
meanings ascribed to them under the Plan, unless specifically set forth herein. 
 The parties hereto agree as follows: 
  

	 	1.	Grant of Options 

 The Company hereby grants to the
Participant Nonqualified Stock Options to purchase Shares in the manner and subject to the terms and conditions of the Plan and this Agreement as follows: 
 (a) Number of Shares Covered by the Options:                      
 (b) “Option Price”: $             per Share 

(c) “Option Term”: The Options have been granted for a period of ten years, ending on the tenth anniversary of the Date
of Award. 
  

	 	2.	Vesting of Options 

 (a) Except as otherwise provided in this Section 2, the Options vest and become exercisable as to 1/4th of the
Shares on the calendar day before each of the first, second, third and fourth anniversaries of the Date of the Award. 
 (b) To the extent
not previously vested in accordance with this Section 2, in the event of a Change of Control (which, for purposes of this Agreement, shall have the meaning set forth in Section 2 (or any successor section thereto) of that certain
Employment Agreement, dated as of July [_], 2008, between the Company and the Participant, as such agreement may be amended from time to time (the “Employment Agreement”)), the Options will fully vest and become exercisable
immediately prior to such Change of Control. 

 (c) To the extent not previously vested in accordance with this Section 2, in the event that the
Participant’s employment is terminated by the Company without Cause or by the Participant for Good Reason, the Options will (i) vest and become exercisable in accordance with Section 3(c) (or any successor section thereto) of the
Employment Agreement and (ii) remain exercisable until they terminate in accordance with Section 4 below. 
 (d) To the extent not
previously vested in accordance with this Section 2, in the event that the Employment Agreement is not renewed by the Company in accordance with Section 2 (or any successor section thereto) of the Employment Agreement, and the Participant
continues to be employed by the Company beyond the expiration of the Term (as defined in the Employment Agreement), the Options will (i) vest and become exercisable in accordance with Section 3(c) (or any successor section thereto) of the
Employment Agreement and (ii) remain exercisable until they terminate in accordance with Section 4 below. 
 (e) To the extent not
previously vested in accordance with this Section 2, in the event of the Participant’s death, the Options will (i) vest and become exercisable as of the date thereof as to one-half the number of unvested Shares covered thereby and
(ii) remain exercisable until they terminate in accordance with Section 4 below. 
 (f) To the extent not previously vested in
accordance with this Section 2, in the event of the Participant’s disability, the Options will (i) vest and become exercisable as of the date thereof as to one-half the number of unvested Shares covered thereby and (ii) remain
exercisable until they terminate in accordance with Section 4 below. 
 (g) Notwithstanding anything to the contrary herein, if the
Participant’s employment with the Company is terminated by the Company with Cause, the Options will terminate immediately and be of no force or effect. 
 (h) To the extent vested in accordance with this Section 2, the Options will remain exercisable until they terminate in accordance with Section 4 below. 
 (i) For purposes of this Section 2, the terms “Cause,” “Good Reason” and
“disability” shall have the respective meanings ascribed to them in the Employment Agreement. 
  

	 	3.	Exercise of Options 

 The Options may be exercised
by any means specified in Section 7(d) of the Plan, as well as by a broker cashless exercise procedure, all of which the Committee hereby approves. 
  

	 	4.	Termination of Options 

 To the extent vested in
accordance with Section 2 above, the Options will terminate, and be of no force or effect, upon the earlier of: 
  

 2 

 (a) the date of termination of the Participant’s employment if such termination is for Cause, the
first anniversary of such date if the Participant’s employment terminates for a reason as set forth in Sections 2(e) or 2(f) above, 60 days following such date if such termination is due to the Participant’s resignation without Good
Reason, or 180 days following such date if such termination is for any other reason; and 
 (b) the expiration of the Option Term.

  

	 	5.	Rights as Stockholder 

 The Participant shall have
no rights as a stockholder of the Company with respect to the Shares covered by the Options until such time as the Option Price has been paid and the Shares have been issued and delivered to the Participant. 
  

	 	6.	Transferability 

 Unless permitted by the Committee
in accordance with the terms of the Plan, the Options may not be sold, transferred, pledged, assigned, or otherwise alienated or hypothecated, other than by will or by the laws of descent and distribution, and, during the Participant’s
lifetime, may be exercised only by the Participant or in the event of the Participant’s legal incapacity, the Participant’s legal guardian or representative. 
  

	 	7.	Miscellaneous 

 (a) This Agreement and the rights of
the Participant hereunder are subject to the terms and conditions of the Plan, as the same may be amended from time to time, as well as to such rules and regulations as the Committee may adopt for administration of the Plan. If there is any
inconsistency between the terms of this Agreement and the terms of the Plan, the Plan’s terms shall completely supersede and replace the conflicting terms of this Agreement. 
 (b) This Agreement shall be subject to all applicable laws, rules, and regulations, and to such approvals by any governmental agencies or national
securities exchanges as may be required or, the Committee determines are advisable. The Participant agrees to take all steps the Company determines are necessary to comply with all applicable provisions of federal and state securities law in
exercising his rights under this Agreement. The Committee shall have the right to impose such restrictions on any Shares acquired pursuant to the exercise of the Option as it deems necessary or advisable under applicable federal securities laws, the
rules and regulations of any stock exchange or market upon which Shares are then listed or traded, and/or any blue sky or state securities laws applicable to Shares. It is expressly understood that the Committee is authorized to administer,
construe, and make all determinations necessary or appropriate to the administration of the Plan and this Agreement, all of which shall be binding upon the Participant. 
  

 3 

 (c) The Options are intended not to provide for a “deferral of compensation” within the meaning
of Section 409A of the Code. Notwithstanding the forgoing or any provision of the Plan or this Agreement, if any provision of this Agreement or the Plan contravenes Section 409A of the Code or could cause the Participant to incur any tax,
interest or penalties under Section 409A of the Code, the Committee may, in its sole discretion and without the Participant’s consent, modify such provision in order to comply with the requirements of Section 409A of the Code or to
satisfy the conditions of any exception therefrom, or otherwise to avoid the imposition of the additional income tax and interest under Section 409A of the Code, while maintaining, to the maximum extent practicable, the original intent and
economic benefit to the Participant, without materially increasing the cost to the Company, of the applicable provision. 
 (d) Delivery of
the Shares underlying the Options upon exercise will be subject to the Participant satisfying all applicable federal, state, local and foreign taxes. The Company shall have authority to deduct or withhold from all amounts payable to the Participant
in connection with the Options, or require the Participant to remit to the Company, an amount sufficient to satisfy any applicable taxes required by law. The Participant shall have the right to cover the minimum statutory withholding by directing
the Company to withhold Shares that would otherwise be received by him, by utilization of a cashless broker transaction or by any other means permitted by Section 18 of the Plan. 
 (e) To the extent not preempted by federal law, this Agreement shall be governed by, and construed in accordance with, the laws of the State of New York.

 IN WITNESS WHEREOF, the Company and the Participant have executed this Agreement as of the Date of Award. 
  

			
	VONAGE HOLDINGS CORP.
		
	By:	 	 
		 	Name:
		 	Title:
		
		 	 
		 	Participant

  

 4

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