Comscore Releases December U.S. Search Engine Rankings

RESTON, VA, January 23, 2008 – Comscore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world, today released its monthly Comscore qSearch analysis of the search marketplace. Among core search engines in December 2007, Google Sites remained the top search property with 5.6 billion core searches conducted, representing a 58.4 percent share of the search market.

December U.S. Core Search Rankings

In December, Google Sites’ share of core searches stood at 58.4 percent. Yahoo! Sites ranked second with 22.9 percent, followed by Microsoft Sites (9.8 percent), Time Warner Network (4.6 percent), and Ask Network (4.3 percent). Yahoo! Sites experienced the most significant market share increase, gaining 0.5 share points versus the previous month.

* Based on the five major search engines including partner searches and cross-channel searches. Searches for mapping, local directory, and user-generated video sites that are not on the core domain of the five search engines are not included in the core search numbers.

Americans conducted 9.6 billion searches at the core search engines, representing a 3.9-percent decline versus November. With many Americans traveling and spending time away from home during the holidays, search activity typically experiences a seasonal decline during December. Google Sites saw 5.6 billion core searches during the month, while Yahoo! Sites recorded 2.2 billion.

* Based on the five major search engines including partner searches and cross-channel searches. Searches for mapping, local directory, and user-generated video sites that are not on the core domain of the five search engines are not included in the core search numbers.

December U.S. Expanded Search Rankings

In the December 2007 analysis of the Top 50 properties worldwide where search activity is observed, Google Sites leads with 7.2 billion searches. Yahoo! Sites ranked second with 2.4 billion searches, followed by Microsoft Sites (963 million), and Time Warner Network (784 million). eBay (up 3.9 percent) and Amazon Sites (up 20.8 percent) were among the few sites experiencing gains, as holiday shoppers contributed to increased search activity on these sites. Craigslist.org (up 6.3 percent) also experienced gains in December.

To request more information on Comscore qSearch 2.0, please visit http://www.comscore.com/contact

About Comscore
Comscore, Inc. (NASDAQ: SCOR) is a global leader in measuring the digital world. This capability is based on a massive, global cross-section of more than 2 million consumers who have given Comscore permission to confidentially capture their browsing and transaction behavior, including online and offline purchasing. Comscore panelists also participate in survey research that captures and integrates their attitudes and intentions. Through its proprietary technology, Comscore measures what matters across a broad spectrum of behavior and attitudes. Comscore analysts apply this deep knowledge of customers and competitors to help clients design powerful marketing strategies and tactics that deliver superior ROI. Comscore services are used by more than 800 clients, including global leaders such as AOL, Microsoft, Yahoo!, BBC, Carat, Cyworld, Deutsche Bank, France Telecom, Best Buy, The Newspaper Association of America, Financial Times, ESPN, Fox Sports, Nestlé, Starcom, Universal McCann, the United States Postal Service, Verizon, ViaMichelin, Merck and Expedia. For more information, please visit www.comscore.com

Press
Bill Daddi
Daddi Brand Communications
646-370-1341
press@comscore.com