BENGALURU/MUMBAI, May 6 -- Blackstone-owned Mphasis Ltd has filed a lawsuit in a US court against rival Coforge Ltd, accusing the Noida-based IT services firm of hiring its employees in violation of contractual restrictions and gaining access to confidential client information.

The Bengaluru-based company, which reported $1.8 billion in revenue last year, has also named its former vice president Brijesh Khergamker as a party in the case filed in a Colorado court. Mphasis alleges Khergamker breached his employment agreement by joining a rival firm less than a year after leaving the company.

"Coforge has initiated a campaign of recruiting Mphasis employees to obtain an unfair competitive advantage in the design, implementation, and mainte...