Comscore Releases January 2010 U.S. Search Engine Rankings

RESTON, VA, February 11, 2010 – 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 2010, Americans conducted 15.2 billion core searches, with Google Sites accounting for 65.4 percent search market share. Microsoft Sites grabbed 11.3 percent market share, up 0.6 percentage points versus December.

January 2010 U.S. Core Search Rankings

Google Sites led the U.S. core search market in January with 65.4 percent of the searches conducted, followed by Yahoo! Sites (17.0 percent), and Microsoft Sites (11.3 percent). Ask Network captured 3.8 percent of the search market, followed by AOL LLC with 2.5 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 15.2 billion searches in January, up 3 percent from December. Google Sites accounted for 9.9 billion searches, followed by Yahoo! Sites (2.6 billion), Microsoft Sites (1.7 billion), Ask Network (574 million) and AOL LLC (375 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.

January 2010 U.S. Expanded Search Rankings

In the January analysis of the top properties where search activity is observed, Google Sites led the search market with more than 14 billion search queries, followed by Yahoo! Sites with 2.7 billion queries and Microsoft Sites with 1.8 billion searches. Bing experienced large growth during the month with an 11-percent increase in query volume to reach more than 1.5 billion searches. Craigslist jumped one position to #6 with 636 million searches, while Facebook grew to 395 million searches, representing a 13-percent increase from the previous month.

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