ClamWin is a free antivirus software for Windows with a strong focus on open-source development.
Best Bitdefender Antivirus Free Edition Alternatives ranked by AI · updated May 2025
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Bitdefender provides a free antivirus software with excellent malware detection and low system impact.
Price: Free
Top 6 Bitdefender Antivirus Free Edition alternatives
Ad-Aware Free Antivirus+ is a comprehensive antivirus program that offers real-time protection against viruses, malware, and spyware.
Baidu Antivirus is a free antivirus program that offers basic protection against viruses, malware, and other threats.
Immunet Protect is a cloud-based antivirus program that utilizes collective intelligence to provide enhanced security against malware and viruses.
AVG AntiVirus is consumer security software for Windows, macOS, Android, and iOS that protects against malware, phishing, and unsafe websites. Its free...
Pros
- Free real-time malware protection across major desktop platforms
- Includes phishing and malicious-download protection
- Generally lighter on system resources than many full security suites
Cons
- Free version displays upgrade prompts more frequently than Microsoft Defender
- Several privacy, ransomware, and performance features require a paid plan
- Independent testing results are closely tied to the broader Avast security engine
Free; paid plans from about $46.68/year
Avast Free Antivirus provides solid protection against malware with features like a behavior shield, Wi-Fi inspector, and password manager.
Pros
- Behavior shield for advanced threat detection
- Includes Wi-Fi inspector for network security
- Password manager for secure credentials
Cons
- Contains ads in the free version
- May impact system performance during scans
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