Lithium Technologies has acquired Klout.

Klout, headquartered in San Francisco, uses data to measure online expertise. The price tag was reportedly $200 million.

The target had raised $40 million in venture capital funding from backers including Mayfield Fund, Kleiner Perkins Caufield & Byers, Grecroft Partners and many others.

San Francisco-based Lithium, led by CEO Rob Tarkoff (pictured), focuses on building online customer communities for brands. The company helps customers, which include AT&T (NYSE: T), Best Buy (NYSE: BBY) and Sephora, respond on social networks. Lithium's VC backers include Benchmark, DAG Ventures, Emergence Capital Partners, New Enterprise Associates, SAP Ventures and Shasta Ventures. The company has raised $152 million.

The deal should give the companies a large data footprint for consumer attitudes, preferences and activities on digital channels.

Lithium has made several other acquisitions, including Social Dynamx in 2012, Scout Labs in 2010 and Keibi Technologies in 2009.

Joe Fernandez, Klout CEO, will join Lithium's executive team, and will continue to run Klout as general manager.

Catapult Advisors served as Lithium's financial adviser on the deal.

Subscribe Now

Complete access to real-time information and analysis of news and trends in the industry.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.