List of Free and Open Source AntiVirus Software

Here is our list of Free and Open Source AntiVirus Software. Please contact us if you know of a program that should be on this page. Boffin supports open source software. If you have an open source project, we may consider making a small donation to your project. To be considered, please get in touch via the contact page.


Avira have millions of user that used this free anti-virus software. Leading software testing centers have also repeatedly distinguished Avira as one of the best. It's best for windows 7, XP SP3 (32-bit) and XP SP2(64-bit).


Avast provide basic virus and spyware blocking but it protects all PC and online info. Users can expect complete internet security. Remote assistance is also provided by its technical support group.

Microsoft Security Essentials

Microsoft Security Essentials is a free anti-virus software for windows 7, XP, and vista users. It's available in 33 languages and can be used for up to 10 PCs.


AVG is both free and paid anti-virus software offered by AVG Internet Security. There are versions available for Windows and Linux.

Bitdefender Antivirus Free Edition

Bitdefender Antivirus Free Edition is considered to be the lightest free anti-virus version available today, Bitdefender's free edition protects PC's effectively and quietly. It doesn't slow down computer systems so it's a top choice by many users.

PC Tools by Symantec

PC Tools by Symantec protection by this anti-virus software may be considered basic but it protects against currently all known viruses, spyware and malware. It also detects unsafe or phishing websites.

Zone Alarm

Zone Alarm offers an anti-virus and firewall edition for Windows XP SP2 and SP3, Vista SP2, Windows 7 and even Windows 8. It also detects Trojan horses, worms, and bots.

Comodo Antivirus

Comodo Antivirus have 3 versions of this free software, one for Windows, another for Linux, and another for Mac. And now it also has a version compatible with Androids.


Sophos - the only anti-virus specifically for the Mac. It's been hailed across Mac and computer review sites as very reliable when it comes to protecting Mac computers. It picks up viruses, Trojans and worms and the quality of the software is the same as its business edition.