Although some companies offer free antivirus programs, they usually protect fewer numbers of devices, run on fewer operating systems, and identify and remove fewer online threats. All of these products are effective and reliable. To get started, check out our lists of the Best Antivirus Software for Mac of 2021 and Best Antivirus Software of 2021. Antivirus software also should be easy to use and have the features you need without breaking the bank. Look for one that detects and removes viruses, spyware, phishing emails, worms, and other threats.