https://press.avast.com/en-gb/avast-acquires-piriform-maker-of-ccleaner
Adding 130 million users to Avast’s performance optimization installed base
Redwood City, California, July 19, 2017 – Avast, the global leader in digital security products, today announced that it has acquired Piriform, the leading provider of device performance optimization software. Founded and based in London, UK, Piriform’s flagship product, CCleaner, speeds up PCs and smartphones by intelligently removing junk and improving the performance of computers and phones.