Yammer

Yammer: 'Twitter for companies' sold to Microsoft for $1B in ~3 years

Shaan recounts Yammer: an internal social network that grew explosively via in-company virality, then monetized by selling admin/oversight tools to bosses once employees were hooked, and sold to Microsoft for a billion dollars about three years in. He says he'd write a $50k check tomorrow to anyone credibly restarting it.

“it got bought for a billion dollars by Microsoft like 3 years after starting. Very quickly, yeah, so it grew super fast, like grew ridiculously fast, 'cause it was a social network inside company, so it had this amazing network effect, amazing in-company virality.”