Some antivirus software provides free VPN services as well that come along with the software when you install it. However, being free doesn't mean that it's unlimited and there's oftentimes a premium plan that you can then choose to subscribe to.
With more than 600 million users worldwide, China-based company Cheetah Mobile is one of the largest developers in the market and their flagship antivirus called Security Master is one of the best out there. If you’re looking for a robust and fully-featured mobile antivirus, CM Security is one app you'll want to try!3rate
Released in 2018, ClamWin Free Antivirus is a security tool published under the GNU license that allows you to remove malicious software from your computer (such as viruses, spyware or adware) and it’s used by more than 600,000 users worldwide on a daily basis.