I would say google because its very poular so more sites are on it.And the company is based in Mountain View, California, and has 13,748 full-time employees (as of June 30, 2007).Google's mission statement is, "to organize the world's information and make it universally accessible and useful."Google's corporate philosophy includes statements such as "Don't be evil", and "Work should be challenging and the challenge should be fun", illustrating a somewhat relaxed corporate culture.
Google was co-founded by Larry Page and Sergey Brin while they were students at Stanford University and the company was first incorporated as a privately held company on September 7, 1998. Google's initial public offering took place on August 19, 2004, raising $1.67 billion, making it worth $23 billion. Through a series of new product developments, acquisitions and partnerships, the company has expanded its initial search and advertising business into other areas, including web-based email, online mapping, office productivity, and video sharing, among others.