Yammer Collects $25M

Yammer, the San Francisco-based maker of a Twitter-like messaging and microblogging service for enterprises, announced today that it has closed a $25 million Series C financing round. U.S. Venture Partners was in the lead, and existing investors Emergence Capital, Charles River Ventures, and Founders Fund also participated. Mamoon Hamid, a partner at U.S. Venture Partners, has joined Yammer’s board. The company says that the Yammer platform is now in use at 80 percent of Fortune 500 companies, and it plans to use the funds to triple the size of its engineering team and also build up its sales operation. The company has raised $40 million in venture cash altogether, including a $5 million round in March 2009 and a $10 million Series B round in February 2010.

Wade Roush is a freelance science and technology journalist and the producer and host of the podcast Soonish. Follow @soonishpodcast

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