Comscore Releases August 2009 U.S. Search Engine Rankings

RESTON, VA, September 22, 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 August 2009, Americans conducted more than 13.9 billion core searches, with Google Sites accounting for 64.6 percent search market share. Microsoft Sites grabbed 9.3 percent market share, a 0.4-percentage point gain versus July.

August 2009 U.S. Core Search Rankings

Google Sites led the U.S. core search market in August with 64.6 percent of the searches conducted, followed by Yahoo! Sites (19.3 percent), and Microsoft Sites (9.3 percent). Ask Network captured 3.9 percent of the search market, followed by AOL LLC with 3.0 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 13.9 billion searches in August, up 3 percent from July. Google Sites accounted for 9 billion searches, followed by Yahoo! Sites (2.7 billion), Microsoft Sites (1.3 billion), Ask Network (541 million) and AOL LLC (415 million).

* 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 2009 U.S. Expanded Search Rankings

In the August 2009 analysis of the top properties where search activity is observed, Google Sites led the search market with 13 billion search queries, followed by Yahoo! Sites with 2.8 billion queries. Microsoft Sites ranked third with more than 1.3 billion searches, up 6 percent from July, followed by craigslist, inc. with 682 million searches. Facebook.com experienced the largest growth of the top ten expanded search properties with a 20-percent increase in query volume to 324 million searches.

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