Comscore Releases November U.S. Search Engine Rankings

RESTON, VA, December 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 November 2007, Google Sites remained the top search property with 5.9 billion core searches conducted, representing a 58.6-percent share of the search market.

November U.S. Core Search Rankings

In November, Google Sites share of core searches stood at 58.6 percent, virtually the same level as in October. Yahoo! Sites ranked second with 22.4 percent, followed by Microsoft Sites (9.8 percent), Ask Network (4.6 percent) and Time Warner Network (4.5 percent), which had the largest share point gain during the month (up 0.3 points).

* 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 10 billion searches at the core search engines, representing a 5-percent decline versus October. With one less day in the month, November can be a seasonally softer month for search activity. Nearly 5.9 billion core searches were conducted at Google Sites 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.

November U.S. Expanded Search Rankings

In the November 2007 analysis of the Top 50 properties worldwide where search activity is observed, Google Sites led the pack with 7.3 billion searches. Yahoo! Sites ranked second with 2.4 billion searches, followed by Microsoft Sites (984 million), and Time Warner Network (838 million). As a result of search activity likely related to holiday shopping, eBay and Amazon Sites both experienced an increase for the month with 489 million and 178 million queries, respectively.

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

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