$25 Million More for Yammer, the Twitter for Work

Chatting at work is serious business for Yammer. The two-year-old start-up has raised a $25 million funding round led by U.S. Venture Partners, complementing the $15 million it has already raised to date. Yammer offers a social network for enterprise customers, and has plenty of competition from the likes of Salesforce’s Chatter, Socialcast, etc.