Yammer is a leading provider of Enterprise Social Networks with over 5 million verified corporate users including employees of more than 85 percent of the Fortune 500. The basic version of Yammer is free, and customers can pay to upgrade their network to receive advanced administrative and security controls, integrations with enterprise applications, priority customer service and a designated customer success manager. Yammer is now part of the Microsoft Office Division.

Jul 19th, 2012 Microsoft Completes Its $1.2B Yammer Acquisition, Techcrunch

Jul 11th, 2012 What the Yammer Acquisition Says About Microsoft – and Enterprise Social Networking, PandoDaily

Apr 11th, 2012 Yammer Buys OneDrum, TechCrunch

Apr 3rd, 2012 David Sacks of Yammer #245, This Week in Startups

Mar 29th, 2012 Like This, Time Magazine

Mar 14th, 2012 Yammer Releases New Analytics Dashboard , MarketWire