Comscore Releases September 2009 U.S. Search Engine Rankings

RESTON, VA, October 14, 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 September 2009, Americans conducted 13.8 billion core searches, with Google Sites accounting for 64.9 percent search market share. Microsoft Sites grabbed 9.4 percent market share, representing a slight gain versus August.

September 2009 U.S. Core Search Rankings

Google Sites led the U.S. core search market in September with 64.9 percent of the searches conducted, followed by Yahoo! Sites (18.8 percent), and Microsoft Sites (9.4 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 13.8 billion searches in September, down 1 percent from August (which had one additional day compared to September). Google Sites accounted for 9 billion searches, followed by Yahoo! Sites (2.6 billion), Microsoft Sites (1.3 billion), Ask Network (541 million) and AOL LLC (416 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.

September 2009 U.S. Expanded Search Rankings

In the September analysis of the top properties where search activity is observed, Google Sites led the search market with 12.8 billion search queries, followed by Yahoo! Sites with 2.7 billion queries and Microsoft Sites with nearly 1.4 billion searches. Facebook.com experienced the largest growth of the top ten expanded search properties with a 19-percent increase in query volume to 384 million searches.

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