Press Room: 2007

Keynote Systems Announces the Results of the World’s First Mobile Web Performance Index

• Index Ranks 10 Most Popular U.S. Mobile Web Sites’ Response Time, Download Speed and Success Rate
• Results Show Companies Often Lead in One Category and Falter in Others, Highlighting the Struggle to Perfect the Mobile Experience for End Users

SAN MATEO, Calif., — November 29, 2007 — Keynote Competitive Research, the industry analysis group of Keynote Systems (Nasdaq: KEYN), today announced the opening results of its weekly mobile Web performance index, the first index to measure and rank the response time, download speed and success rate of mobile Web sites. The results, which provide insight into the performance of the sites from Nov. 19 (12 am GMT) to Nov. 26 (12 am GMT), show that leading companies are still perfecting their mobile offerings’ performance; for example, Google led in response time, but placed in the bottom half for download speed.

“Interestingly, not only are we seeing sites leading in one area and trailing in the other, but in our preliminary data we also noticed the sites are evolving, with regular changes in their response times, availability and success rates,” said Manny Gonzalez, senior director of mobile technologies at Keynote. “Clearly, companies are still struggling to perfect their mobile offerings. I believe this index will be a valuable tool for the industry overall and those committed to improving their mobile sites and, in turn, the end users’ experience.”

The results of the mobile Web performance index, which measures the U.S. mobile sites of CNN (NYSE: TWX), ESPN, Facebook, Fandango, Google (Nasdaq: GOOG), MapQuest, MSN (Nasdaq: MSFT), Schwab (NASDAQ: SCHW), The Weather Channel and Yahoo (Nasdaq: YHOO), can be found every Wednesday at www.keynote.com/keynote_competitive_research/performance_indices/mobile/us_index.html.

Companies committed to the mobile experience can set up customized measurements around the index to benchmark themselves against competitors and gain access to valuable market data for $500 per measurement per location and modem.

Full Results for the Week of November 19

Response Time is the average time in seconds it took to download the mobile Web site to the mobile phone

Download Speed is average speed (in bytes per second) at which that mobile Web site downloaded to the mobile phone

Success Rate is the percentage of time mobile Web site successfully downloaded the complete content to the mobile phone

Methodology

The Keynote Mobile Index, U.S. (KM10 – U.S.), is the competitive performance index for 10 of the most widely known U.S. mobile Web sites today. Keynote’s KM10 measures the responsiveness and availability of these sites. To ensure that the indices are independent of variables introduced in mobile devices, all measurements are made using the same modem emulating the same device for each carrier. Motorola RAZR V3, being the most popular device in the U.S., is emulated by all the modems to take measurements. Measurements are taken from four locations in North America – New York, Dallas, Chicago and San Francisco.

The KM10 measurements include single page downloads of the mobile sites from each location. Each modem takes one measurement for each site every hour across all locations. All U.S. locations download the same list of sites in the KM10 – U.S. index. As a result, for every site in the U.S., there are 24 measurements every day times four carriers times four locations.

At the end of every week, all the measurements for each mobile site are aggregated across all locations and all carriers to give a unique value for that week. The mobile sites are ranked in terms of performance and the index is posted on the Keynote Web site. Keynote also publishes an Industry Index which is the aggregated value across all mobile sites, all locations and all carriers.

About Keynote

Keynote Systems (Nasdaq “KEYN”) is the global leader in on-demand test & measurement solutions for continuously improving the online experience. As an independent and trusted third-party, Keynote provides IT and marketing executives with an unbiased view into their Internet services from around the world. For over a decade, Keynote has been providing measurement data and testing capabilities that allow companies to understand and improve their customer’s online and mobile experience. Keynote has four test and measurement businesses: Web performance, mobile quality, streaming & VoIP, and customer experience/UX. In addition, Keynote’s industry analysis group called Keynote Competitive Research publishes proprietary studies measuring customer experience and service levels across a wide range of industries.

Known as The Mobile and Internet Performance Authority™, Keynote has a market-leading infrastructure of 2,400 measurement computers and mobile devices in over 240 locations around the world. Keynote also maintains one of the most representative panels of online users consisting of 160,000 consumers. Keynote’s on-demand, hassle-free infrastructure allows businesses to access services they need, when they need them to pinpoint and fix mobile quality and Internet problems before they impact customers.

Keynote helps over 2,600 corporate customers become “the best of the best” by helping them improve online business performance and mobile communications quality. Keynote’s customers represent top Internet and mobile companies including American Express, BP, Caterpillar, Dell, Disney, eBay, ESPN Mobile, E*TRADE, Expedia, FedEx, Microsoft, SonyEricsson, Sprint, T-Mobile, Verizon 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 (650) 403-2400.

Keynote, The Internet Performance Authority, Perspective and Customer Experience Rankings are registered trademarks and The Mobile and Internet Performance Authority and True Experience are trademarks of Keynote Systems, Inc. Other trademarks are the property of their respective owners. © 2007 Keynote Systems, Inc.

Editorial Contacts:

Dan Berkowitz, Keynote Systems, (650) 403-3305, dan.berkowitz@keynote.com

Mariana Kosturos, Citigate Cunningham, (415) 618-8786, mkosturos@citigatecunningham.com