Google launched their Gmail email service on 1st April 2004. Offering 1GB storage space, Gmail took the world by storm. However, the service wasn’t open to everyone at the start and one needed to have a special invite to create an email account. Only about three years later, was the need for an invite lifted from Gmail.
Initially, Facebook was open to only Harvard students. Dustin Moskovitz, Mark Zuckerberg's roommate, helped spread it to other Ivy League colleges. [more...]