FOR IMMEDIATE RELEASE

Forrester Research Corrects Third-Quarter 2007 Financial Results Press Release

Cambridge, Mass., November 20, 2007 . . . Forrester Research, Inc. (Nasdaq: FORR) today reported a correction to the consolidated statements of cash flows included in its November 19, 2007 press release announcing financial results for the third quarter ended September 30, 2007. The consolidated statement of cash flows for the nine months ended September 30, 2006 contained a mathematical error, resulting in inaccurate net cash provided by operating activities and accordingly, in the net increase in, and end of period, cash and cash equivalents. The consolidated statements of income and balance sheets are not affected.

The consolidated statements of income, consolidated balance sheets, and corrected consolidated statements of cash flows are attached.

About Forrester Research

Forrester Research (Nasdaq: FORR) is an independent technology and market research company that provides pragmatic and forward-thinking advice about technology's impact on business and consumers. For 24 years, Forrester has been a thought leader and trusted advisor, helping global clients lead in their markets through its research, consulting, events, and peer-to-peer executive programs. For more information, visit www.forrester.com.

Contact:

Karyl Levinson
Vice President, Corporate Communications
Forrester Research, Inc.
+ 1 617/613-6262
press@forrester.com

Michael A. Doyle
Chief Financial Officer
Forrester Research, Inc.
+ 1 617/613-6181
investor@forrester.com

Download Q3 2007 Balance Sheet (PDF).

Download Q3 2007 Cash Flow (PDF).

Download Q3 2007 Income Statement (PDF).

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