Comscore Releases January 2009 U.S. Search Engine Rankings

RESTON, VA, February 18, 2009 – Comscore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world, today released its monthly Comscore qSearch analysis of the U.S. search marketplace. In January 2009, Americans conducted 13.5 billion core searches, a 7-percent gain versus December 2008.

January 2009 U.S. Core Search Rankings

Google Sites led the U.S. core search market in December with 63.0 percent of the searches conducted, followed by Yahoo! Sites (21.0 percent), Microsoft Sites (8.5 percent), AOL LLC (3.9 percent) and Ask Network (3.7 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.

Americans conducted 13.5 billion searches at the core search engines, up 7 percent from December. Google Sites handled 8.5 billion core searches, followed by Yahoo! Sites with 2.8 billion and Microsoft Sites with 1.1 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.

January 2009 U.S. Expanded Search Rankings

In the Comscore January 2009 analysis of the top properties where search activity is observed, Google Sites led with 11.7 billion searches, up 5 percent versus December. Yahoo! Sites ranked second with nearly 3 billion searches, followed by Microsoft Sites (1.2 billion) and AOL LLC (781 million).

About Comscore

Comscore, Inc. (NASDAQ: SCOR) is a global leader in measuring the digital world and preferred source of digital marketing intelligence. For more information, please visit www.comscore.com/companyinfo

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