ClamAV vs Avast
A detailed comparison to help you choose between ClamAV and Avast.
ClamAV Open-source antivirus engine used by mail servers worldwide. | Avast Free antivirus with optional premium tier. Largest user base worldwide. | |
|---|---|---|
| Rating | 3.8 (237 reviews) | 4.1 (475 reviews) |
| Pricing Model | free | freemium |
| Starting Price | Free | From $0/mo |
| Best For | Best for users needing comprehensive antivirus and malware protection | Best for users needing comprehensive antivirus and malware protection |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | — | — |
ClamAV
Pros
- + Free, GPLv2 open-source antivirus engine
- + Strong for mail gateway and server scanning
- + Daemon mode enables efficient repeated scanning
- + Linux on-access scanning via clamonacc
- + Official signatures shipped in signed CVD containers
- + Supports local Unix socket or TCP clamd protocol
Cons
- - No on-access scanning feature on Windows
- - Not a full consumer AV suite or GUI-first tool
- - clamd TCP socket is unauthenticated by default
- - Third-party signatures can add security risk
- - clamscan can be inefficient for frequent scans
Avast
Pros
- + Ransomware Shield prevents untrusted app folder changes
- + Real Site helps protect against DNS hijacking
- + VPN supports WireGuard, OpenVPN, and Mimic
- + Kill switch and split tunneling are supported
- + Refund policy: 14 days monthly, 30 days annual
Cons
- - Jumpshot data-selling history hurts privacy trust
- - Smaller VPN network than top standalone providers
- - Potential connection-metadata logging concerns
- - Product bundles can be confusing to compare
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