TechCrunch reports that Google has paid an undisclosed sum to acquire PostRank, a company specializing in social intelligence. The news has just been confirmed in PostRank’s blog post as well. Their team will be moving to Google’s Mountain View, California-based headquarters.

We are extremely excited to join Google. We believe there is simply no better company on the web today that both understands the value of the engagement data we have been focusing on, and has the platform and reach to bring its benefits to the untold millions of daily, active Internet users.

This should get interesting. PostRank measures popularity of social statuses on Facebook, Twitter and other services, meaning it could be a fit for Google’s social efforts, starting with the +1 button they recently rolled out. A Google spokesperson told TechCrunch that the PostRank acquisition will help make their social analytics “more actionable and accountable” for advertisers.

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