Phase Forward (PFWD)

Equity Compensation Plan Information

        The following table provides information as of December 31, 2008 regarding shares of common stock that may be issued under the Company's equity compensation plans consisting of the 2004 Stock Option and Incentive Plan and the 2004 Employee Stock Purchase Plan.

(1)

Includes 78,154 shares available under the Company's 2004 Employee Stock Purchase Plan.

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STOCKHOLDER PROPOSALS

        Proposals of stockholders intended for inclusion in the proxy statement to be furnished to all stockholders entitled to vote at the next annual meeting of our stockholders, pursuant to Rule 14a-8 promulgated under the Exchange Act by the Securities and Exchange Commission, must be received at our principal executive offices no later than November 25, 2009. Stockholders who wish to make a proposal at the next annual meeting of our stockholders—other than one that will be included in our proxy statement—must notify us between October 26, 2009 and November 25, 2009. In order to curtail controversy as to the date on which we received a proposal, it is suggested that proponents submit their proposals by Certified Mail—Return Receipt Requested. In addition, such proposals must satisfy the procedures set forth in Rule 14a-8 under the Exchange Act. In addition, stockholders wishing to nominate a Board member should comply with the procedures set forth herein under "Policies Regarding Director Nominations—Procedures for Recommendation of Director Nominees by Stockholders" located elsewhere in this proxy statement.

SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

        Section 16(a) of the Exchange Act requires our Board members, executive officers and persons who own more than ten percent of a registered class of our equity securities (collectively, the "Reporting Persons") to file reports of ownership and changes in ownership with the Securities and Exchange Commission. Such persons are required by regulations of the Securities and Exchange Commission to furnish us with copies of all such filings.

        Based solely on our review of copies of such filings, or written representations from Reporting Persons that all reportable transactions were reported, we believe that during the year ended December 31, 2008, the Reporting Persons timely filed all reports they were required to file under Section 16(a); except that one report, covering two transactions, was filed late by Dr. Bleicher due to administrative error on December 3, 2008.

EXPENSES AND SOLICITATION

        The cost of solicitation of proxies will be borne by us, and in addition to soliciting stockholders by mail, our Board members, officers and other employees may, without receiving additional compensation, solicit proxies personally or by telephone. Solicitation by our Board members, officers and other employees may also be made of some of our stockholders in person or by mail, telephone or telegraph following the original solicitation. We may request banks, brokers and other custodians, nominees and fiduciaries to forward proxy soliciting materials to the owners of our stock held in their names and, if so, will reimburse such banks, brokers and other custodians, nominees and fiduciaries for their reasonable out-of-pocket costs incurred in connection with the distribution of such proxy materials. We may also retain an independent proxy solicitation firm to assist in the solicitation of proxies.

OTHER BUSINESS

        The Board of Directors knows of no business that will be presented for consideration at the annual meeting other than those items stated above. If any other business should come before the annual meeting, votes may be cast pursuant to proxies in respect to any such business in the best judgment of the person or persons acting under the proxies.

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VIEWING OF PROXY MATERIALS VIA THE INTERNET

        Federal Law permits us to distribute our annual report and this proxy statement to our stockholders in a fast and efficient manner via the Internet. This reduces the amount of paper delivered to a stockholder's address and eliminates the cost of sending these documents by mail. Stockholders may elect to view all future annual reports and proxy statements on the Internet instead of receiving them by mail. If you would like to receive future stockholder communications over the Internet exclusively, and no longer receive any material by mail, please visit http://www.amstock.com, click on Shareholder Account Access, enter your account number (shown on your proxy card) and tax identification number to log in, and then select receive company mailings via e-mail and provide your e-mail address. Your election to view proxy materials online is perpetual unless you revoke it later.

HOUSEHOLDING OF PROXY MATERIALS

        Our 2008 Annual Report, including audited financial statements for the fiscal year ended December 31, 2008, is being mailed to you along with this proxy statement. In order to reduce printing and postage costs, Broadridge Financial Solutions, Inc. has undertaken an effort to deliver only one Annual Report and one proxy statement to multiple stockholders sharing an address. This delivery method, called "householding," is not being used, however, if Broadridge has received contrary instructions from one or more of the stockholders sharing an address. If your household has received only one Annual Report and one proxy statement, Phase Forward will deliver promptly a separate copy of the Annual Report and the proxy statement to any stockholder who sends a written request to Phase Forward Incorporated, 77 Fourth Avenue, Waltham, MA 02451, Attention: Secretary, Office of the General Counsel. If your household is receiving multiple copies of Phase Forward's Annual Reports or proxy statements and you wish to request delivery of a single copy, you may send a written request to Phase Forward Incorporated, 77 Fourth Avenue, Waltham, MA 02451, Attention: Secretary, Office of the General Counsel.

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APPENDIX A

Equity Compensation Plan Information

        See Part III, Item 12 for information regarding securities authorized for issuance under our equity compensation plans.

Equity Compensation Plan Information

        See Part III, Item 12 for information regarding securities authorized for issuance under our equity compensation plans.

Equity Compensation Plan Information

        See Part III, Item 12 for information regarding securities authorized for issuance under our equity compensation plans.

Equity Compensation Plan Information

        See Part III, Item 12 for information regarding securities authorized for issuance under our equity compensation plans.

Equity Compensation Plan Information

See Part III, Item 12 for information regarding securities authorized for issuance under our equity compensation plans.

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We maintain the following three equity compensation plans under which our equity securities are authorized for issuance to our employees and/or directors: 1997 Stock Option Plan; 2003 Non-Employee Director Stock Option Plan; and 2004 Stock Option and Incentive Plan. Each of the foregoing equity compensation plans was approved by our stockholders. The following table presents information about these plans as of December 31, 2005.

We have not made any grants under the 1997 Stock Option Plan since our July 2004 initial public offering, but may do so in the future.

20

See Part III, Item 12 for information regarding securities authorized for issuance under our equity compensation plans.

Equity Compensation Plan Information

        We maintain the following three equity compensation plans under which our equity securities are authorized for issuance to our employees and/or directors: 1997 Stock Option Plan; 2003 Non-Employee Director Stock Option Plan; and 2004 Stock Option and Incentive Plan. Each of the foregoing equity compensation plans was approved by our stockholders. The following table presents information about these plans as of December 31, 2004.

        No further grants are being made under the 1997 Stock Option Plan.

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CERTAIN RELATIONSHIPS AND RELATED-PARTY TRANSACTIONS

        Other than compensation agreements and other arrangements which are described in "Compensation and Other Information Concerning Directors and Officers" and the transactions described below, in 2004, there has not been, and there is not currently proposed, any transaction or series of similar transactions to which we were or will be a party in which the amount involved exceeded or will exceed $60,000 and in which any director, executive officer, holder of five percent or more of any class of our capital stock or any member of their immediate family had or will have a direct or indirect material interest.

        In June 2004, we declared a special cash distribution, representing a return of capital, on each share of our series B, C and D preferred stock equal to five percent of the original purchase price of those shares. The aggregate amount of this special cash distribution was approximately $4.7 million, which was paid on September 15, 2004 to our former series B, C and D preferred stockholders of record as of June 15, 2004. Certain Atlas Venture entities and certain North Bridge Venture Partners entities held shares of our series B, C and D preferred stock, which converted into shares of common stock at the closing of the initial public offering on a one to one basis. For information regarding these stockholders and their association with some of our directors, see "Securities Ownership of Certain Beneficial Owners and Management".

        Thomas Weisel Partners LLC was a managing underwriter for our July 2004 initial public offering and received fees and commissions of approximately $1.3 million in connection with the offering. Entities affiliated with Thomas Weisel Partners LLC (the Thomas Weisel group) beneficially owned in the aggregate more than 10% of our outstanding capital stock at the time of the offering, as determined under the Conduct Rules of the National Association of Securities Dealers, Inc.