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Passive audit vs vulnerability scanner vs WAF: what to choose in 2026?

Name: CleanIssue
Price range: €€

Published on 2026-02-106 min readFlorian

3 approaches, 3 different objectives

Vulnerability scanner: automated detection. Fast, cheap, but high false positive rate and misses business logic flaws.

WAF: real-time protection. Defensive — doesn't detect your flaws, temporarily protects them.

Human external review: manual expert analysis. Detects business logic flaws, data exposures, auth bypasses.

Scanner alone: ~30%

WAF alone: blocks ~40% of known attacks

Human audit: ~80%

Scanner + human audit: ~95%

Use all three complementarily. Start with the external review — it's the foundation.

Three adjacent analyses to keep exploring the same attack surface.

Price comparison in France: external review, pentest, and automated scanning. A realistic budget view for lean SaaS teams.

Which backend is more secure? Supabase RLS vs Firebase rules — strengths, weaknesses and pitfalls.

Deciding between an external security review and a traditional pentest? Here are the 5 practical differences.

Sources

Written by Florian

Reviewed on 2026-02-10

Editorial analysis based on official vendor, project, and regulator documentation.

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