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 customers' 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(TM), 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 2,700 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, 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 WebEffective 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. (C) 2008 Keynote Systems, Inc.

SOURCE: Keynote Systems, Inc.

Keynote Systems, Inc.
Dan Berkowitz, 650-403-3305 (Public Relations)
dberkowitz@keynote.com
Kirsten Chapman, 415-433-3777 (Investor Relations)
kchapman@lhai.com

"Marketers compulsively optimize SEM ad copy and bids to get the highest ranking within budget. Page load time performance is just the next frontier for search marketing," said Anshu Agarwal, executive director of marketing at Keynote. "This change by Google elevates the performance imperative to the marketing suite - it's not just for Web operations geeks anymore."

Keynote SEM landing page performance reports measure the top landing pages on your site from the end user perspective in 10 U.S. metropolitan areas and provide daily metrics and alerts based on user defined thresholds. Keynote will translate technical metrics into actionable insights and provide tactical feedback on remediation opportunities.

Availability and Pricing

Keynote's SEM landing page performance reports are available now. To setup a personal demo please visit: http://keynote.com/sfadtech.

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 customers' 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(TM), 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 2,700 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, 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 and Perspective 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. (C) 2008 Keynote Systems, Inc.

SOURCE: Keynote Systems, Inc.

Keynote Systems, Inc.
Dan Berkowitz, 650-403-3305
dberkowitz@keynote.com

Zandan is a 14-person French-based software company, whose founder and former chief technology officer, Jerome Jacq, joined Keynote in 2007. Zandan supplies active end-to-end customer simulation solutions used across the entire mobile service life cycle from interactive testing, service & handset acceptance to live monitoring, alerting, troubleshooting and SLA management. Keynote MAP allows wireless operators and mobile content developers to interactively test, measure and monitor mobile content from 22 geographic locations worldwide utilizing a library of over 1,000 wireless device profiles.

Umang Gupta, chairman and CEO of Keynote, said "Our MAP service was implemented by us on the basis of Zandan code, and it has already found traction in the U.S. with many mobile customers. We now hope to repeat the same success in Europe with the help of the Zandan team. Our intent is to restructure the Zandan business in an orderly way over the coming six months and to rename it Keynote France. Thereafter , the company, which will be headed by Jerome Jacq, will have the mission of increasing our mobile and Internet business in France, Spain and adjoining countries."

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(TM), 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 2,700 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.

Forward-Looking Statements

This press release contains forward-looking statements that are not purely historical regarding the Company or management's intentions, hopes, beliefs, expectations and strategies for the future. Because such statements deal with future events, they are subject to various risks and uncertainties, and actual results could differ materially from the Company's current expectations.

Forward-looking statements in this release include, but are not limited to, future financial effects of the transaction, the integration of Zandan products and technology with those of Keynote, and their benefits, plans for the geographic expansion and retention of Zandan customers. It is important to note that actual outcomes and Keynote's actual results could differ materially from those in such forward-looking statements.

Factors that could cause actual results to differ materially include risks and uncertainties such as the need to retain existing customers and obtain new customers in order for the acquisition to be accretive in the future, potential differences between French GAAP and U.S. GAAP, the acquisition may not be accretive to U.S. GAAP operating income or net income (which includes the effect of the amortization of intangibles), as the amount of the intangibles to be amortized and the period over which such amortization will occur has not be finally determined, Keynote's ability to control costs, unforeseen expenses related to the Zandan business, potential customer retention issues after the merger, particularly as many customers do not have long term commitments to continue using the services, pricing pressure with respect to services, competition, and unforeseen issues with respect to the integration of technologies and personnel of Zandan, unforeseen expenses relating to any restructuring of the Zandan business, risks related to international expansion and conducting operations in foreign countries and overall market and general economic conditions. Readers should also refer to the risks outlined in Keynote's reports filed with the Securities and Exchange Commission, including its Annual Report on Form 10-K for its fiscal year ended September 30, 2007, and its quarterly reports on Form 10-Q and any current reports on Form 8-K filed during the fiscal year.

All forward-looking statements and reasons why results might differ included in this release are made as of the date of this press release, based on information available to Keynote as of the date of this press release, and

Keynote assumes no obligation to update any such forward-looking statement or reasons why results might differ.

Keynote, The Internet Performance Authority and Perspective 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. (C) 2007 Keynote Systems, Inc.

SOURCE: Keynote Systems, Inc.

Keynote Systems, Inc.
Dan Berkowitz, 650-403-3305 (Public Relations)
dberkowitz@keynote.com
Kirsten Chapman, 415-433-3777 (Investor Relations)
kchapman@lhai.com

To find out more and view the industries included in the program please visit online: http://www.keynote.com/keynote_competitive_research/online_excellence/ overview.html. (Due to its length, this URL may need to be copied/pasted into your Internet browser's address field. Remove the extra space if one exists.)

The new program will allow top performers on rigorous Keynote Competitive Research industry studies to publicize their ranking using the Keynote mark of online excellence, and other Keynote-supplied publicity vehicles, that can be leveraged across a company's marketing campaigns including public relations, online and offline advertising and on the homepage of the company's Web site.

"We are happy to be launching this program to recognize outstanding customer experience and performance on the Web," said Anshu Agarwal, vice president of marketing at Keynote. "There is a lot that goes into making today's mobile and Web sites truly exceptional and this program will highlight those companies that exhibit excellence day in and day out all year long according to actual end users and performance data collected by Keynote Competitive Research."

About Keynote Competitive Research

For over a decade, Keynote has been the Internet's performance authority. To perform its studies Keynote leverages the world's largest mobile and Internet test and measurement network and one of the most representative panels of Internet users to deliver data and insights on the end user's experience. Keynote Competitive Research provides an in-depth understanding of customers, competitors, and markets. Companies purchasing the research receive true business intelligence that help to determine the best online strategies for gaining a competitive edge and accomplishing business goals. Keynote Competitive Research rankings are based on responses from real users in the Keynote Research Panel, and on over 30 days of performance data collected through Keynote Transaction Perspective(R).

For each study, Keynote recognizes the companies with the overall top ranking, as well as those with excellence in specific categories. Keynote Competitive Research studies are carried out in several industries including automotive, financial services, media/entertainment portals, retail, travel, technology and voice services. Company Web sites are chosen based on ComScore usage statistics, online revenue projections and/or other metrics significant to the industry. For companies within a Keynote Study there is neither advance notification, nor any related financial transactions prior to study completion.

Keynote industry studies provide a unique and comprehensive look at what drives online success and what companies can do to achieve it. Industry studies assess Web sites from the ground up; focusing not only on the high-level business objectives of sites, such as customer acquisition and brand building, but also on the core essentials, such as usability, visual appeal, availability, and responsiveness.

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 customers' 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(TM), 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 2,700 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, 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 WebEffective 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. (C) 2007 Keynote Systems, Inc.

SOURCE: Keynote Systems, Inc.

Keynote Systems, Inc.
Dan Berkowitz, 650-403-3305
dberkowitz@keynote.com