The presentation used at the conference will be available at Keynote's website www.keynote.com in the Investor Relations section.

About Keynote

Keynote Systems (Nasdaq "KEYN") is the global leader in on-demand test & measurement solutions for continuously improving the online experience. For over a decade, Keynote has been providing measurement data and testing capabilities that allow companies to understand and improve their customers' online and mobile experience. Keynote has four test and measurement businesses: Web performance, mobile quality, streaming & VoIP, and customer experience/UX.

Known as The Mobile and Internet Performance Authority(TM), Keynote has a market-leading infrastructure of over 3,000 measurement computers and mobile devices in over 240 locations around the world. Keynote's 2,800 customers represent top Internet and mobile companies including American Express, Dell, Disney, eBay, E*TRADE, Expedia, Microsoft, SonyEricsson, Sprint, T-Mobile, Verizon, Vodafone and YouTube. 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 1-800-KEYNOTE.

Keynote, The Internet Performance Authority, Perspective and WebEffective are registered trademarks and The Mobile and Internet Performance Authority, True Experience and FlexUse are trademarks of Keynote Systems, Inc. Other trademarks are the property of their respective owners. © 2009 Keynote Systems, Inc.

SOURCE: Keynote Systems, Inc.

Keynote Systems, Inc.
Dan Berkowitz, 650-403-3305 (Public Relations)
dberkowitz@keynote.com
or
Lippert / Heilshorn & Associates
Kirsten Chapman, 415-433-3777 (Investor Relations)
kchapman@lhai.com