Private equity-backed Inventus Solutions Inc. is buying discovery-assistance business Unified OS Ltd.

Unified, headquartered in London, provides e-discovery services to companies, law firms and government agencies that operate in Europe. Terms of the deal were not disclosed.

Inventus says the acquisition will help it provides outsourcing services for the full legal process. The Chicago-based business is a discovery management firm that aims to help clients reduce the costs and risks associated with the discovery process.

Clearlake has been invested in Inventus since 2013. The Santa Monica, California-based firm has about $1.4 billion in assets under management, and invests in automotive, business services, consumer products and retail, public safety, energy, industrial and technology companies.

GE Capital's telecom, media and technology team provided financing for the deal.

Other recent business-services deals have come from Huron Consulting (Nasdaq: HURN), which acquired health care services firm Studer Group for $325 million in January, and HGGC, which invested in Survey Sampling International LLC, which provides business-to-business research. 

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