Armed with such data, Avast's software can be used on Macs, PCs, and servers without missing a beat. According to the vendor, it's best for small businesses that need it for four devices or less. If you need something a bit more powerful, you can opt for the company's antivirus connected to its Cloud Management Console. That's designed for five devices or more. Avast's solution is designed to protect your computer against viruses, of course, but there's also extensive security features in the form of a built-in firewall as well as a VPN too.