Linkedin

LinkedIn is a professional networking site that allows its members to create business connections, search jobs, and find potential clients.

Described as a MySpace for business users, LinkedIn was the most popular business networking site developed by a talented team of Silicon Valley entrepreneurs. But could LinkedIn develop a business model, expand beyond tech job seekers, and stave off competition from Facebook? Jeremy Levine bet they could by leading a round in 2006. Five years later, LinkedIn went public, and five years after that Microsoft acquired the business for $26 billion.