Keynote Systems to Announce Fiscal Third Quarter 2011 Financial Results on July 26th.(Company overview)

SAN MATEO, Calif. -- Keynote[R] Systems (NASDAQ:KEYN), the global leader in Internet and mobile cloud monitoring, intends to report its fiscal third quarter 2011 financial results for the period ended June 30, 2011 after the market closes on Tuesday, July 26, 2011. Keynote will host an earnings conference call at 2:00 P.M. Pacific Time (5:00 P.M. Eastern).

To access the call in the U.S., please dial (800) 580-9478, and for international callers dial (630) 691-2769. Callers may provide the following confirmation number 30193942 to access the call more quickly, and are encouraged to dial into the call 10 to 15 minutes prior to the start to prevent any delay in joining. The conference call will also be broadcast live over the Internet and available for replay for 90 days at www.keynote.com. In addition, a replay of the call will be available via telephone for two business days, beginning two hours after the call. To listen to the telephone replay in the U.S., please dial (888) 843-7419, and for international callers dial (630) 652-3042 and enter access code 30193942#.

About Keynote

Keynote Systems (NASDAQ: "KEYN") is the global leader in Internet and mobile cloud monitoring. We provide companies with solutions for continuously improving the online experience. Founded in 1995, Keynote delivers testing, monitoring and measurement products and services for any enterprise including online portals, e-commerce sites, B2B sites, mobile operators and mobile infrastructure providers. Keynote products and services help companies improve customer experience in four areas: Web performance, mobile quality, streaming and real user experience testing.

Known as The Mobile and Internet Performance Authority[TM], Keynote has a market-leading on-demand infrastructure of over 3,000 measurement computers and mobile devices in over 275 locations around the world. Keynote's 2,800 customers represent top Internet and mobile companies including American Express, AT&T, Disney, eBay, E*TRADE, Expedia, Google, Microsoft, SonyEricsson, T-Mobile 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 1-800-KEYNOTE.

Keynote[R], DataPulse[R], CustomerScope[R], Keynote CE Rankings[R], Keynote Customer Experience Rankings[R], Perspective[R], Keynote Red Alert[R], Keynote Traffic Perspective[R], Keynote WebEffective[R], The Internet Performance Authority[R], MyKeynote[R] , SIGOS[R], SITE[R], Keynote[TM], The Mobile & Internet Performance Authority[TM] and Keynote FlexUse[TM] are trademarks or registered trademarks of Keynote Systems, Inc. in the United States and/or other countries. All other trademarks are the property of their respective owners. [c] 2011 Keynote Systems, Inc.