World's largest independent software testing and quality assurance company will use investment to accelerate global acquisition strategy and product development LONDON, July 10, 2019-- Qualitest, the world's largest pure-play outsourced software testing and quality assurance specialist, announced today that Bridgepoint, an international private equity group, has agreed to take a majority stake in the business for an undisclosed sum, replacing current investor Marlin Equity Partners as majority owner.