With Bing, Microsoft Grows Share of U.S. Searches by 50 Percent

A year after the official relaunch of its search product under the Bing brand, Microsoft’s share of U.S. searches has grown by 50 percent, according to data from comScore.

The measurement firm estimated Microsoft’s sites accounted for 8 percent of U.S. searches in May 2009, but that the company grew its share to 12.1 percent of searches in May 2010. That represents a year-over-year growth rate of over 50 percent following the official relaunch of its search product under the Bing brand on June 1, 2009.

Over the same period, searches on Google and Yahoo properties dropped by 1.3 percentage points and 1.8 percentage points, respectively, with Ask and AOL sites also losing searches. Data for Google sites does not include searches on its video site YouTube.

Month-over-month, Microsoft sites accounted for 6 percent more searches in May than they did during April, with Google sites attracting just 2 percent more. Overall, users conducted 3 percent more searches, month-over-month.

Share of U.S. Searches Among Leading Providers, May 2009 vs May 2010
Share of Searches (%)
Domain May 2009 May 2010

Year-over-Year Point
Change (%)

Google Sites 65.0 63.7 -1.3
Yahoo Sites 20.1 18.3 -1.8
Microsoft Sites* 8.0 12.1 4.1
Ask Network 3.9 3.6 -0.3
AOL Network 3.1 2.3 -0.8
Note: Data is 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.
*May 2009 data does not include search activity at Microsoft Bing, which was launched on June 1.
Source: comScore 2010

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