#2 Google

Google has a very big list of online territories like Google Search, Gmail, YouTube, Google+, Google Books, Google Finance, Google News and many other service. It accounts for 10 percent of time online with 193.8 million desktop visitors and 113.7 million mobile visitors.

Google’s YouTube, by far the most visited video site. In 2012, more than 188 billion videos were streamed on the web site, according to comScore. In comparison, only about 8.9 billion videos were streamed on Hulu, the second-most visited video property. Despite becoming a multidimensional company over the years, Google shows no signs of letting up on its original business of search. A whopping 66.7 percent of Internet searches were conducted through Google in December 2012, up from 65.9 percent during the same month of 2011.

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