Comscore Releases November 2009 U.S. Search Engine Rankings

RESTON, VA, December 16, 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 November 2009, Americans conducted 14.4 billion core searches, with Google Sites accounting for 65.6 percent search market share, up slightly from 65.4 percent in October. Microsoft Sites grabbed 10.3 percent market share, up 0.4 percentage points versus October.

November 2009 U.S. Core Search Rankings

Google Sites led the U.S. core search market in November with 65.6 percent of the searches conducted, followed by Yahoo! Sites (17.5 percent), and Microsoft Sites (10.3 percent). Ask Network captured 3.8 percent of the search market, followed by AOL LLC with 2.8 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 14.4 billion searches in November, up 1 percent from October. Google Sites accounted for 9.5 billion searches, followed by Yahoo! Sites (2.5 billion), Microsoft Sites (1.5 billion), Ask Network (548 million) and AOL LLC (401 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.

November 2009 U.S. Expanded Search Rankings

In the November analysis of the top properties where search activity is observed, Google Sites led the search market with nearly 13.8 billion search queries, followed by Yahoo! Sites with 2.6 billion queries and Microsoft Sites with 1.5 billion searches. Bing experienced the largest growth of the top ten expanded search properties with a 6-percent increase in query volume to more than 1.3 billion searches. eBay and Amazon Sites both experienced gains in November as consumers ramped up their retail search activity for the holiday season.

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