Avast is a popular antivirus software that provides protection against malware, viruses, and other online threats. It was founded in 1988 by Eduard Ku?era and Pavel Baudi?, and is headquartered in Prague, Czech Republic. Avast offers a variety of products for both consumers and businesses, including free and paid antivirus software, as well as security solutions for mobile devices. The company has over 435 million users worldwide and is considered one of the largest cybersecurity companies in the world.