Comscore Releases August U.S. Search Engine Rankings

RESTON, VA, September 21, 2007 – 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 August 2007, Google Sites remained the top search property with more than 5.5 billion core searches conducted, representing a 56.5 percent share of the search market. Time Warner Network was the only other core search engine property to increase share, up 0.1 share point to 4.5 percent, with 441 million searches.

In Comscore’s recently introduced expanded search report, the largest gains were recorded by YouTube and Craigslist, with 9.0-percent and 7.6-percent increases in their number of search queries.

August U.S. Core Search Rankings

In August, Google Sites maintained its position atop the core search rankings with 56.5 percent of U.S. searches, gaining 1.3 share points versus the previous month. Yahoo! Sites ranked second with 23.3 percent, followed by Microsoft Sites (11.3 percent), Time Warner Networks (4.5 percent) and Ask Network (4.5 percent).

*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.

Nearly 5.5 billion core searches were conducted at Google Sites during the month, marking a 1.6 percent increase in volume versus July. Time Warner Network, assisted by gains at AOL, gained in query volume, with a 1.2-percent increase to 441 million searches.

*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.

August U.S. Expanded Search Rankings

In the August 2007 analysis of the Top 50 properties worldwide where search activity is observed, Google Sites led the pack with 6.8 billion searches. Yahoo! Sites ranked second with nearly 2.5 billion searches, followed by Microsoft Sites (1.1 billion), Time Warner Network (937 million) and Fox Interactive Media (571 million).

For 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