Press Room: 2007

Keynote to Present at Upcoming Investor Conferences– FBR on May 30th and Kaufman Brothers on June 6th

San Mateo, Calif., — May 29, 2007 — Keynote Systems (Nasdaq: KEYN), the global leader in Internet and mobile test and measurement services, today announced Drew Hamer, CFO, will participate at the following investor conferences:

• Friedman, Billings, Ramsey 2007 Growth Conference at the Grand Hyatt New York Hotel in New York, NY — Hamer will present at 11:15 a.m. ET on May 30th.
• Kaufman Brothers Digital Media Forum at the Exchange Conference Center in Boston, MA — He will be attending 1-on-1 meetings throughout the day on June 6th.

All presentations used at the conference will be available at Keynote’s website (www.keynote.com) on the Investor Relations main section.

            About Keynote
            Keynote Systems (Nasdaq “KEYN”) is the global leader in test & measurement solutions that improve mobile communications and online business performance. As an independent and trusted third-party, Keynote provides IT and marketing executives with an unbiased view into their Internet services from around the world. For over a decade, we have been providing measurement data and testing capabilities that allow companies to understand and improve their customer’s online and mobile experience. Keynote has four test and measurement businesses: Web performance, mobile quality, streaming & VoIP, and customer experience/UX. In addition, our industry analysis group called Keynote Competitive Research publishes proprietary studies measuring customer experience and service levels across a wide range of industries.

Known as The Mobile and Internet Performance Authority™, Keynote has a market-leading infrastructure of 2,400 measurement computers and mobile devices in over 240 geographic locations around the world. Keynote also maintains one of the most representative panels of online users consisting of 160,000 consumers. Our on-demand, hassle-free infrastructure allows businesses to access services they need, when they need them to pinpoint and fix mobile quality and Internet problems before they impact customers.

We help over 2,600 corporate customers become “the best of the best” by helping them improve online business performance and mobile communications quality. Our customers represent top mobile and Internet companies including American Express, BP, Caterpillar, Dell, Disney, eBay, ESPN Mobile, E*TRADE, Expedia, FedEx, Microsoft, SonyEricsson, Sprint, T-Mobile, Verizon and Vodafone.
Keynote Systems, Inc. is headquartered in San Mateo, California and can be reached at www.keynote.com or by phone in the U.S. at (650) 403-2400.

Keynote, The Internet Performance Authority and Perspective are registered trademarks and The Mobile and Internet Performance Authority is a trademark of Keynote Systems, Inc. Other trademarks are the property of their respective owners. © 2007 Keynote Systems, Inc.