On 25th June 2012 Microsoft has announced to buy Yammer for $1.2 Billion... Yammer is a social network website which was launched in 2008 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. “The acquisition of Yammer underscores our commitment to deliver technology that businesses need and people love,” said Steve Ballmer, CEO, Microsoft.
“Yammer adds a best-in-class enterprise social networking service to Microsoft’s growing portfolio of complementary cloud services.” Now Yammer will join the Microsoft Office Division, led by division President Kurt DelBene, and the team will continue to report to current CEO David Sacks.
Source: Microsoft