Private equity firms Clearlake Capital Group LP and Cerca Group LLC are buying Inventus LLC for an undisclosed amount.

Inventus, headquartered in Chicago, provides data discovery services for law firms, companies and the government. Terms of the deal were not disclosed. The company was sold by an undisclosed family-owned business. 

Since its founding in 2006, Los Angeles-based Clearlake has invested $3 billion-plus in more than 50 deals. Portfolio companies include Jacuzzi, Mformation and CompuDyne. The firm sold Solutionary in June, after acquiring it in November 2011. Recently, Clearklake purchased a unit of Agilysys Inc. (Nasdaq: AGYS) and struggling online retailer Bluefly Inc. 

Cerca Group, founded in 2009, invests mainly in the business services, software and communications sectors. The New York based firm has invested in Samba Holdings Inc., American Driving Records Inc. and IRTH Solutions Inc. 

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