Keynote Systems, Inc. : Keynote Systems to Announce Fiscal Second Quarter 2012 Financial Results on May 1st

Keynote® Systems (NASDAQ:KEYN), the global leader in Internet and mobile cloud testing & monitoring, intends to report its fiscal second quarter 2012 financial results for the period ended March 31, 2012, after the market closes on Tuesday, May 1, 2012. Keynote will host an earnings conference call at 2:00 P.M. Pacific Time (5:00 P.M. Eastern Time).

To access the call in the U.S., please dial (800) 588-4973, and for international callers dial (847) 230-5643. Callers may provide the following confirmation number 32155335 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 webcast can be accessed at www.keynote.com and is available for replay for 90 days. 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 32155335#.

Follow Keynote on Twitter at: www.twitter.com/KeynoteSystems and www.twitter.com/Keynote_Mobile.

About Keynote Systems

Keynote® Systems, Inc., (NASDAQ:KEYN) is the global leader in Internet and mobile cloud testing and monitoring. Keynote maintains the world's largest on-demand performance monitoring and testing infrastructure for Web and mobile sites comprised of over 4,000 measurement computers and mobile devices in over 275 locations around the world that enable companies to continuously improve the online and mobile experience. Known as 'The Mobile and Internet Performance Authority™,' Keynote offers three market-leading product platforms:

Keynote Perspective® provides on-demand performance monitoring for enterprise Web and mobile sites including online portals, e-commerce sites and B2B sites. Over 2,000 customers rely on Keynote Perspective services to know precisely how their websites, content, and applications perform on actual browsers, networks, and mobile devices.

Keynote DeviceAnywhere™ is an enterprise-class, cloud-based, mobile application lifecycle management (ALM) testing & quality assurance platform. It is used by over 1,000 mobile developers and enterprises to deliver mobile applications, content and services faster while reducing downtime and testing costs.

Keynote SIGOS offers active end-to-end Quality of Service (QoS) testing and monitoring solutions for mobile, fixed and VoIP communications. Its SITE and Global Roamer products are used by over 200 network operators, content providers, carriers and regulators in over 100 countries worldwide.

Keynote's 4,000 customers represent top Internet and mobile companies and include American Express, AT&T, Disney, eBay, E*TRADE, Expedia, Google, Microsoft, SonyEricsson, T-Mobile and Vodafone. Keynote Systems is headquartered in San Mateo, California and can be reached at http://www.keynote.com/ or by phone in the U.S. at 1-800-KEYNOTE.

The trademarks or registered trademarks of Keynote Systems, Inc. in the United States and other countries include Keynote^®, Data Pulse^®, CustomerScope^®, Customer Experience Rankings^®, Perspective^®, Keynote Red Alert^®, WebEffective^®, The Internet Performance Authority^®, MyKeynote^®, SIGOS^®, SITE^®, The Mobile & Internet Performance Authority®, FlexUse^®, DeviceAnywhere® DemoAnywhere®, DeviceAnywhere Proof Center®, DeviceAnywhere Test Center®, MonitorAnywhere®, and all other related trademarks, trade names, logos, characters, design and trade dress and may not be used without written permission. All other trademarks are the property of their respective owners. © 2012 Keynote Systems, Inc.

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Kirsten Chapman, 415-433-3777
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Keynote Systems, Inc.
Dan Berkowitz, 650-403-3305
dberkowitz@keynote.com

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