Exhibit 10.1

EXECUTION VERSION

VOTING AGREEMENT

THIS VOTING AGREEMENT (this “Agreement”) is made and entered into as of June 23, 2013, by and between Hawaii Parent Corp., a Delaware corporation (“Parent”), and the undersigned stockholder (“Holder”) of Keynote Systems, Inc., a Delaware corporation (the “Company”).

RECITALS

Pursuant to an Agreement and Plan of Merger, dated as of the date hereof (the “Merger Agreement”), by and among Parent, Hawaii Merger Corp., a Delaware corporation and wholly-owned subsidiary of Parent (“Merger Sub”), and the Company, Merger Sub is merging with and into the Company (the “Merger”) and the Company, as the surviving corporation of the Merger, will thereby become a wholly-owned subsidiary of Parent.  Concurrently with the execution and delivery of the Merger Agreement and as a condition and inducement to Parent and Merger Sub to enter into the Merger Agreement, Parent has required that Holder enter into this Agreement.  Holder is the beneficial owner (within the meaning of Rule 13d-3 of the Exchange Act) of such number of shares of the outstanding Common Stock, par value $0.001 per share, of the Company as is indicated beneath Holder’s signature on the last page of this Agreement (the “Shares”), provided that Shares subsequently transferred as permitted by, and in accordance with, Section 1(b) below shall, from and after such transfer, cease to be considered “Shares” under this Agreement.  Capitalized terms used herein but not defined shall have the meanings ascribed to them in the Merger Agreement.

AGREEMENT

The parties agree as follows:

1.                                      Agreement to Retain Shares.

(a)                                 Transfer.  During the period beginning on the date hereof and ending on the earlier to occur of (i) the Effective Time and (ii) the Expiration Date (as defined in Section 4), (1) except as contemplated by the Merger Agreement, and except as provided in Section 1(b), Holder agrees not to, directly or indirectly, sell, transfer, exchange or otherwise dispose of (including by merger, consolidation or otherwise by operation of law) the Shares or any New Shares (as defined below), and (2) Holder agrees not to, directly or indirectly, grant any proxies or powers of attorney, deposit any of the Shares into a voting trust or enter into a voting agreement with respect to any of the Shares, or enter into any agreement or arrangement providing for any of the actions described in this clause (2) (other than as required to comply with Section 2(a)).

(b)                                 Permitted Transfers.  Section 1(a) shall not prohibit a transfer of Shares or New Shares (as defined below) by Holder to (i) any family member or trust for the benefit of any family member, (ii) any stockholder, member or partner of any Holder which is an entity,(iii) any Affiliate of Holder or (iv) any person or entity if and to the extent required by any non-consensual Order, by divorce decree or by will, intestacy or other similar Law, so long as, in the case of the foregoing clauses (i), (ii) and (iii), the assignee or transferee agrees to be bound by the terms of this Agreement and executes and delivers to the parties hereto a written consent memorializing such agreement.

(c)                                  New Shares.  Holder agrees that any shares of Company Common Stock that Holder purchases or with respect to which Holder otherwise acquires record or beneficial ownership (but excluding shares of Company Common Stock underlying unexercised Company Common Stock Options (until such time as any such Company Common Stock Options are exercised and the underlying shares of Company Common Stock are acquired by Holder)) after the date of this Agreement and prior to the earlier to occur of (i) the Effective Time and (ii) the Expiration Date (“New Shares”) shall be subject to the terms and conditions of this Agreement to the same extent as if they comprised the Shares.

2.                                      Agreement to Vote Shares.

(a)                                 Until the earlier to occur of the Effective Time, the Expiration Date and a Company Adverse Recommendation Change that is not rescinded or otherwise withdrawn, at every meeting of the stockholders of the Company called with respect to any of the following, and at every adjournment thereof, and on every action or approval by written consent of the stockholders of the Company with respect to any of the following, Holder shall appear at such meeting (in person or by proxy) and shall vote or consent the Shares and any New Shares (i) in favor of adoption of the Merger Agreement and (ii) against any Acquisition Proposal (the “Covered Proposals”).  This Agreement is intended to bind Holder as a stockholder of the Company (and not in any other capacity such as a director or officer of the Company) and only with respect to the Covered Proposals.  Except as expressly set forth in clauses (i) and (ii) of this Section 2, Holder shall not be restricted from voting in favor of, against or abstaining with respect to any other matter presented to the stockholders of the Company.

(b)                                 Holder further agrees that, until the earlier to occur of the Effective Time and the Expiration Date, Holder will not, and will not permit any entity under Holder’s control to, (A) solicit proxies or become a “participant” in a “solicitation” (as such terms are defined in Rule 14A under the Exchange Act) in opposition to any Covered Proposal, (B) initiate a stockholders’ vote with respect to an Acquisition Proposal or (C) become a member of a “group” (as such term is used in Section 13(d) of the Exchange Act) with respect to any voting securities of the Company with respect to an Acquisition Proposal.

3.                                      Representations, Warranties and Covenants of Holder.  Holder hereby represents, warrants and covenants to Parent that Holder (i) is the beneficial owner of the Shares, which, at the date of this Agreement and at all times up until the earlier to occur of (A) the Effective Time and (B) the Expiration Date, will be free and clear of any liens, claims, options, charges or other encumbrances (other than those created by this Agreement) and (ii) as of the date hereof does not own of record or beneficially any shares of outstanding capital stock of the Company other than the Shares (excluding shares as to which Holder currently disclaims beneficial ownership in accordance with applicable law).  Holder has the legal capacity, power and authority to enter into and perform all of Holder’s obligations under this Agreement.  This Agreement has been duly and validly executed and delivered by Holder and constitutes a valid and binding agreement of Holder, enforceable against Holder in accordance with its terms, subject to (a) laws of general application relating to bankruptcy, insolvency and the relief of debtors and (b) rules of law governing specific performance, injunctive relief and other equitable remedies.

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4.                                      Termination.  This Agreement shall terminate automatically and shall have no further force and effect as of the earliest to occur of (i) the termination of the Merger Agreement in accordance with the terms and provisions thereof, (ii) the notification by Parent to the Company that it is not willing or not able to proceed with the Merger on substantially the terms set forth in the Merger Agreement, including by advising the Company that it is unwilling to proceed with the Merger unless the Merger Consideration is reduced or changed in form, (iii) any waiver, change or amendment to the terms or conditions of the Merger Agreement that adversely affects Holder (including any reduction in the Merger Consideration, but excluding any extension of the Outside Termination Date pursuant to the Merger Agreement), (iv) immediately following the Stockholders Meeting, including any adjournment or postponement thereof and (v) the Outside Termination Date (the earliest of such dates, the “Expiration Date”).

5.                                      Fiduciary Duties.  Notwithstanding anything in this Agreement to the contrary:  (i) Holder makes no agreement or understanding herein in any capacity other than in Holder’s capacity as a beneficial owner of the Shares, (ii) nothing in this Agreement shall be construed to limit or affect the Holder’s rights and obligations as a director, officer, or other fiduciary of the Company, and (iii) Holder shall have no liability to Parent, Merger Sub or any of their Affiliates under this Agreement as a result of any action or inaction by Holder acting in his capacity as a director, officer, or other fiduciary of the Company.

6.                                      Miscellaneous.

(a)                                 Amendments and Waivers.  Any term of this Agreement may be amended or waived with the written consent of the parties hereto or their respective successors and assigns.  Any amendment or waiver effected in accordance with this Section 6(a) shall be binding upon the parties and their respective successors and assigns.

(b)                                 Governing Law; Venue.  This Agreement shall be governed by and construed in accordance with the laws of the State of Delaware, without giving effect to principles of conflicts of law thereof.  Each of the parties hereto (i) consents to submit to the personal jurisdiction of any federal court located in the State of Delaware or any Delaware state court in the event any dispute arises out of this Agreement, (ii) agrees that it shall not attempt to deny or defeat such personal jurisdiction by motion or other request for leave from any such court and (iii) agrees that it shall not bring any action relating to this Agreement in any court other than a federal or state court sitting in the State of Delaware.

(c)                                  Counterparts.  This Agreement may be executed in two or more counterparts, each of which shall be deemed an original and all of which together shall constitute one instrument.

(d)                                 Titles and Subtitles.  The titles and subtitles used in this Agreement are used for convenience only and are not to be considered in construing or interpreting this Agreement.

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(e)                                  Notices.  Any notice required or permitted by this Agreement shall be in writing and shall be deemed sufficient upon receipt, when delivered personally or by courier, overnight delivery service or confirmed facsimile, or 72 hours after being deposited in the regular mail as certified or registered mail with postage prepaid, if such notice is addressed to the party to be notified at such party’s address or facsimile number as set forth below, or as subsequently modified by written notice.

(f)                                   Severability.  If one or more provisions of this Agreement are held to be unenforceable under applicable law, the parties agree to renegotiate such provision in good faith, in order to maintain the economic position enjoyed by each party as close as possible to that under the provision rendered unenforceable. In the event that the parties cannot reach a mutually agreeable and enforceable replacement for such provision, then (i) such provision shall be excluded from this Agreement, (ii) the balance of the Agreement shall be interpreted as if such provision were so excluded and (iii) the balance of the Agreement shall be enforceable in accordance with its terms.

(g)                                  No Ownership Interest.  Nothing contained in this Agreement shall be deemed to vest in Parent or any of its Affiliates any direct or indirect ownership or incidence of ownership of or with respect to any Shares or New Shares.  All rights, ownership and economic benefit of and relating to the Shares and any New Shares shall remain vested in and belong to Holder, and Parent shall have no authority to manage, direct, superintend, restrict, regulate, govern or administer any of the policies or operations of the Company or exercise any power or authority with respect to Holder in the voting of any Shares or New Shares, except as specifically provided herein and in the Merger Agreement.

(h)                                 Specific Performance.  Each of the parties hereto recognizes and acknowledges that a breach of any covenants or agreements contained in this Agreement will cause Parent and Merger Sub to sustain damages for which they would not have an adequate remedy at law for money damages, and therefore each of the parties hereto agrees that in the event of any such breach Parent shall be entitled to the remedy of specific performance of such covenants and agreements and injunctive and other equitable relief in addition to any other remedy to which they may be entitled, at law or in equity.

[SIGNATURE PAGE FOLLOWS]

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IN WITNESS WHEREOF, the parties have caused this Voting Agreement to be duly executed on the date first above written.

[Signature Page to Voting Agreement]

[Signature Page to Voting Agreement]

SPOUSAL CONSENT

The undersigned represents that the undersigned is the spouse of:

                                                                          
Name of Holder

and that the undersigned is familiar with the terms of the Voting Agreement (the “Agreement”), entered into as of June 23, 2013, by and among Hawaii Parent Corp., a Delaware corporation, and the undersigned’s spouse.  The undersigned hereby agrees that the interest of the undersigned’s spouse in all property which is the subject of the Agreement shall be irrevocably bound by the terms of the Agreement and by any amendment, modification, waiver or termination signed by the undersigned’s spouse.  The undersigned further agrees that the undersigned’s community property interest in all property which is the subject of the Agreement shall be irrevocably bound by the terms of the Agreement, and that the Agreement shall be binding on the executors, administrators, heirs and assigns of the undersigned.  The undersigned further authorizes the undersigned’s spouse to amend, modify or terminate the Agreement, or waive any rights thereunder, and that each such amendment, modification, waiver or termination signed by the undersigned’s spouse shall be binding on the community property interest of undersigned in all property which is the subject of the Agreement and on the executors, administrators, heirs and assigns of the undersigned, each as fully as if the undersigned had signed such amendment, modification, waiver or termination.