A Lesson From Yammer: Here's How You Get Someone To Pay You $1 Billion

The tech world was shocked last month that Microsoft paid Yammer a whopping $1.2 billion. In February, Yammer raised $85 million at a valuation of about half of that. Analysts estimate Yammer's revenues this year will come in anywhere between $15 million and $30 million. That's up from less than $10 million in 2010.

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