Founded by Reid Hoffman, Allen Blue, Konstantin Guericke, Eric Ly, and Jean-Luc Vaillant on May 5, 2003, LinkedIn has grown up to become a successful public company with more than 225 million members and nearly $325 million in quarterly revenue.
The business-related social network has become a company most startups dream about growing into, and has certainly played a big part in bringing professional lives online and making them more social.
