What are the key differences between Microsoft Defender Antivirus and Bitdefender?

Compare Microsoft Defender Antivirus and Bitdefender side by side on Lunoo to see detailed feature differences, AI scores, and expert analysis.

How are Microsoft Defender Antivirus and Bitdefender scored?

Microsoft Defender Antivirus has an AI score of 6.0/10 and Bitdefender has an AI score of 9.3/10. Scores are based on features, user satisfaction, and overall quality analysis.

Microsoft Defender Antivirus vs Bitdefender 2026 — Compared

Microsoft Defender Antivirus

Bitdefender

WINNER Bitdefender

Bitdefender edges ahead with a score of 9.3/10 compared to 6.0/10 for Microsoft Defender Antivirus. While both are highl...

Microsoft Defender Antivirus

6.0 Fair

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emoji_events WINNER

Bitdefender

9.3 Excellent

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Microsoft Defender Antivirus Pricing not available

payments

Bitdefender From $4.99/mo Free plan available

psychology AI Verdict

Bitdefender edges ahead with a score of 9.3/10 compared to 6.0/10 for Microsoft Defender Antivirus. While both are highly rated in their respective fields, Bitdefender demonstrates a slight advantage in our AI ranking criteria. A detailed AI-powered analysis is being prepared for this comparison.

emoji_events Winner: Bitdefender

verified Confidence: Low

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description Overview

Microsoft Defender Antivirus

Microsoft Defender Antivirus is built into Windows 10 and 11 and provides a baseline level of protection. It utilizes cloud-delivered protection and ransomware protection. Exploit Guard helps prevent malware from running. While it's convenient and free, it may not offer the same level of protection as dedicated antivirus suites.

Bitdefender

Bitdefender protects your smartphone and tablet against viruses, malware and online threats and keeps your private information secure from hackers. It automatically scans all mobile apps for viruses, malware and any other threats to protect your Android device. Blocks malicious, phishing and fraudulent links and keeps your online activity safe on the most popular browsers so you can navigate or bu...