Sorted by starting price
6 Cheapest Free Antivirus Software of 2026
By the Rankozo research desk · Updated November 12, 2026
Among the 8 tools in our best free antivirus software ranking, Bitdefender Antivirus Free has the lowest verified paid starting price at $2.50 per month, billed yearly at $29.99 for 3 devices (first year). Prices below are quoted from each vendor's US pricing page.
- 01
Bitdefender Antivirus FreeWindows users who want a quiet scanner
Antivirus Free at no cost; Antivirus Plus Multiplatform $29.99 first year for 3 devices; renewal may be higher
Full entry, No. 2 overallStarts at
$2.50
Score 8.8
- 02
Comodo Internet Securityexperienced Windows users who want a free firewall and sandbox
Free Internet Security at no cost; paid Comodo Antivirus $29.99 for a year; 3 licenses $39.99
Full entry, No. 7 overallStarts at
$2.50
Score 7.9
- 03
Avast Free Antivirushome users with a mix of PCs, Macs and phones
Free Antivirus at no cost; Premium Security $49.08 first year for 1 PC and 1 mobile device, renews at $77.99 a year
Full entry, No. 1 overallStarts at
$4.09
Score 8.9
- 04
AVG AntiVirus Freefamilies who want free Wi-Fi and password breach checks
AntiVirus Free at no cost; AVG Ultimate $59.88 first year for 10 devices, regular price $149.99 a year
Full entry, No. 3 overallStarts at
$4.99
Score 8.7
- 05
Malwarebytes Freecleaning up an infected PC as a second opinion
Free scanner at no cost; Standard $59.99 a year for 3 devices; Plus with VPN $79.99; Standard Family $119.99 a year for 10 devices
Full entry, No. 8 overallStarts at
$5
Score 7.4
- 06
Microsoft DefenderWindows users who want nothing extra to install
Microsoft Defender Antivirus is included in Windows; Microsoft 365 Personal $99.99 a year or $9.99 a month adds the Defender app for Windows, Mac, iOS and Android
Full entry, No. 4 overallStarts at
$8.33
Score 8.7
Scores and prices come from our Best Free Antivirus Software ranking, which uses one method for every tool. Questions or corrections: editorial@rankozo.com