Two computer security companies, Avast and AVG, were founded in the Czech Republic. In 2016, Avast led by Pavel Baudiš bought rival AVG for US$1.3 billion, together at the time, these companies had a user base of about 400 million people and 40% of the consumer market outside of China. Avast is the leading provider of antivirus software, with a 20.5% market share.