UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K


                                 CURRENT REPORT
                         Pursuant to Section 13 or 15(d)
                     of the Securities Exchange Act of 1934


        Date of Report (Date of earliest event reported): April 26, 2005


                              KEYNOTE SYSTEMS, INC.
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             (Exact name of registrant as specified in its charter)


                                    Delaware
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                 (State or other jurisdiction of incorporation)



            000-27241                                      94-3226488
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           (Commission                                   (IRS Employer
          File Number)                                   Identification No.)


      777 Mariners Island Boulevard, San Mateo, CA                 94404
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        (Address of principal executive offices)                (Zip Code)


                                 (650) 403-2400
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              (Registrant's telephone number, including area code)


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          (Former name or former address, if changed since last report)


Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[]  Written communications pursuant to Rule 425 under the Securities Act
    (17 CFR 230.425)

[]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act
    (17 CFR 240.14a-12)

[]  Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
    Act (17 CFR 240.14d-2(b))

[]  Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
    Act (17 CFR 240.13e-4(c))


Item 2.02     Results of Operations and Financial Condition.

     On April 26, 2005, Keynote Systems, Inc. (the "Company") issued a press
release announcing its results for the fiscal quarter ended March 31, 2005. A
copy of the press release is attached as Exhibit 99.01 to this Current Report.
This Current Report and the exhibit attached hereto are being furnished pursuant
to Item 2.02 of Form 8-K and shall not be deemed "filed" for purposes of Section
18 of the Securities Exchange Act of 1934, nor shall they be deemed incorporated
by reference in any filing with the Securities and Exchange Commission under the
Securities Exchange Act of 1934 or the Securities Act of 1933, whether made
before or after the date hereof and irrespective of any general incorporation by
reference language in any filings, unless expressly set forth by specific
reference to this filing.

     The press release includes information on free cash flow. This measure is
not based on any standardized methodology prescribed by U.S. generally accepted
accounting principles ("GAAP") and is not necessarily comparable to similar
measures presented by other companies. Free cash flow is calculated by excluding
capital expenditures from GAAP cash flows from operations. This measure should
not be considered in isolation or as a substitute for measures prepared in
accordance with GAAP. Management believes that free cash flow is a useful
measure of performance as it provides its investors with an additional method
for evaluating its operating performance and liquidity and reflects the
resources available for the Company to invest in acquisitions or to repurchase
stock.

Item 9.01    Financial Statements and Exhibits.

     (c)     Exhibits.
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           Exhibit No.                        Exhibit Title
           -----------                        -------------

              99.01       Press Release, dated April 26, 2005, issued by Keynote
                          Systems, Inc.


                                    SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.


                                 KEYNOTE SYSTEMS, INC.



Date:  April 26, 2005            By:  /s/ Peter Maloney
                                      ------------------------------------------
                                      Peter Maloney
                                      Vice President and Chief Financial Officer