Cylance Inc. is an American software firm founded in 2012. It develops antivirus programs and other kinds of computer software that prevent, rather than reactively detect, viruses and malware. The company is based in Irvine, California. Cylance has been described as “the first company to apply artificial intelligence, algorithmic science and machine learning to cyber security.” Cylance executives have stated their mission is to block computer viruses or malware before they have an effect on a users computer. Cylance was founded by Stuart McClure and Ryan Permeh. McClure was previously co-founder of Foundstone, a security consultancy, which he sold to McAfee in 2004, becoming that firms Chief Tech Officer. McClure is also the author of Hacking Exposed, reportedly the best-selling IT security book to date.