Comscore Releases March 2009 U.S. Search Engine Rankings

RESTON, VA, April 15, 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 March 2009, Americans conducted 14.3 billion core searches, a 9-percent gain versus February.

March 2009 U.S. Core Search Rankings

Google Sites led the U.S. core search market in March with 63.7 percent of the searches conducted, followed by Yahoo! Sites (20.5 percent), Microsoft Sites (8.3 percent), Ask Network (3.8 percent) and AOL LLC (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 14.3 billion searches at the core search engines, up 9 percent from February. Google Sites accounted for 9.1 billion core searches, followed by Yahoo! Sites with 2.9 billion and Microsoft Sites with 1.2 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.

March 2009 U.S. Expanded Search Rankings

In the Comscore March 2009 analysis of the top properties where search activity is observed, Google Sites led with 12.4 billion searches, up 10 percent versus February. Yahoo! Sites ranked second with 3.1 billion searches, followed by Microsoft Sites (1.2 billion) and AOL LLC (813 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