Norton Security is described as 'Protects your most important device, whether it's a PC, Mac, smartphone, or tablet, from online threats such as malware and spyware' and is a Anti-Virus app in the security & privacy category. There are more than 50 alternatives to Norton Security for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best Norton Security alternative is ClamAV, which is both free and Open Source. Other great apps like Norton Security are Avast Free Antivirus, Microsoft Defender, Avira Antivirus and Kaspersky AntiVirus.