What are the key differences between Microsoft Defender and Preview?

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

How are Microsoft Defender and Preview scored?

Microsoft Defender has an AI score of 6.2/10 and Preview has an AI score of 9.0/10. Scores are based on features, user satisfaction, and overall quality analysis.

Microsoft Defender vs Preview 2026 — Compared

Microsoft Defender

Preview

WINNER Preview

Preview edges ahead with a score of 9.0/10 compared to 6.2/10 for Microsoft Defender. While both are highly rated in the...

Microsoft Defender

6.2 Fair

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emoji_events WINNER

Preview

9.0 Excellent

Misclassified

Microsoft Defender Pricing not available

payments

Preview Free plan available

psychology AI Verdict

Preview edges ahead with a score of 9.0/10 compared to 6.2/10 for Microsoft Defender. While both are highly rated in their respective fields, Preview demonstrates a slight advantage in our AI ranking criteria. A detailed AI-powered analysis is being prepared for this comparison.

emoji_events Winner: Preview

verified Confidence: Low

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description Overview

Microsoft Defender

Microsoft Defender is the built-in security solution for Windows. It has improved significantly over the years and now provides solid, baseline protection against malware, ransomware, and phishing. It is completely free, integrated into the OS, and requires no setup. While it is sufficient for the average user who practices safe browsing habits, it often lacks the advanced heuristic and behavioral...

Preview

Preview is the default PDF viewer on macOS, and for many users, it is all they will ever need. It is surprisingly capable, offering basic annotation tools like highlighting, text boxes, and shapes, as well as the ability to merge, split, and reorder pages. Because it is built into the OS, it is incredibly fast and requires no installation. While it lacks the advanced features of dedicated software...