As Facebook is one of the major players and MessageMe is a new kid on the block, you would expect that the latter would be intimidated, if not crushed, by any direct attack from the social giant. In this case, it doesn't seem to be so. Despite Facebook recently cutting off MessageMe's access to the Facebook Friend Graph, the newcomer has since grown in popularity and managed to raise $1.9 million.
Facebook may be this year's most-discussed tech IPO, but last year certainly belonged to LinkedIn. The company, which is turning a modest profit, also has expanded its developer offerings. With that came many more developers to the LinkedIn API, more than doubling the number of registered devs in less than a year. And those apps created on the platform account for billions of API requests each month going to business social network.