Best Free Antivirus in 2026 (No Trial Required)

Plenty of "free" antivirus offers are really just trials in disguise. These five are free forever, with real-time protection included, not just an on-demand scan.

What "free" should actually include

At minimum, a genuinely free antivirus tier should include real-time (not just on-demand) scanning. Several products on this list clear that bar comfortably.

Our top free picks

• Bitdefender — the strongest free-tier detection we've tested.
• Kaspersky — a free tier built on one of the most accurate engines available.
• Avast One — widely used, with a capped but usable free VPN bundled in.
• Windows Defender — already installed on every Windows PC, free forever.

What you give up by staying free

Typically a full firewall, unlimited VPN data, identity monitoring, and priority live support. See the complete list with justifications on our Best Free Antivirus page.

When it's worth paying

If you handle sensitive data, run a small business, or want a VPN without the data caps, our full rating can help you compare paid tiers directly against these free options.