Keynote Systems and Yankee Group Partner to Rank Best Mobile Web Sites of 2010

4G World 2010: Booth #438 -- Keynote® Systems (Nasdaq:KEYN), the global leader in Internet and mobile cloud monitoring, and Yankee Group, the leading source of insight and counsel for builders, operators and users of connectivity solutions, announced today that the two companies partnered this year to produce Yankee Group's (News - Alert) annual mobile Web site ranking, "Best of the Anywhere Web 2010." The highly popular research report provides an in-depth quantitative and qualitative evaluation of leading mobile Web sites.

Keynote Systems (NASDAQ:KEYN) is the global leader in solutions for continuously improving the Internet and mobile experience. Founded in 1995, Keynote provides testing, monitoring and measurement products and services for a variety of enterprises such as 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 & VoIP, and online usability 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 240 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 (News - Alert), SonyEricsson, T-Mobile and Vodafone.

Keynote®, DataPulse®, CustomerScope®, Keynote CE Rankings®, Keynote Customer Experience Rankings®, Perspective®, Keynote Red Alert®, Keynote Traffic Perspective®, Keynote WebEffective®, The Internet Performance Authority®, MyKeynote®, SIGOS®, SITE®, Keynote™, The Mobile & Internet Performance Authority™, Screen Sensing Technology and Keynote FlexUse™ 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. © 2010 Keynote Systems, Inc.