comScore’s December 2013 US search engine market share with Google leading the way owning 67.3&% of the search engine market share.
Meanwhile, Microsoft came in with 18.2 percent (up 0.1 percentage points) at the expense of Yahoo, which took 10.8% (down .5% over November).
comScore’s April 2011 U.S. search engine market share and rankings. The April 2011 qSearch data reflect the impact of Yahoo! Search Direct, Yahoo!’s new feature that delivers search results in real-time while users type their query. Yahoo! Search Direct was available only on Yahoo! U.S. Web Search for the month of April.