Keynote Systems (NASDAQ: KEYN), the global leader in mobile and web cloud testing & monitoring, intends to participate in the Three Part Advisors Southwest IDEAS Investor Conference on Wednesday, November 14^th at the Sheraton Dallas Hotel by the Galleria in Dallas. Presenting from management will be Curtis Smith, chief financial officer.

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

About Keynote Systems

Keynote® Systems, Inc., (NASDAQ:KEYN) is the global leader in mobile and web cloud testing & monitoring. Keynote maintains the world’s largest on-demand performance monitoring and testing infrastructure for Web and mobile sites comprised of over 7,000 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® provides the industry's only true cloud-based platform for testing and monitoring the functionality, usability, performance and availability of mobile applications and websites. It's suite of mobile testing solutions is used by over 1,000 mobile developers and enterprises to deliver quality mobile applications and services to the mobile channel.

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