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Nessus
tenable.com · Nessus Vulnerability Scanner · scored Dec 2025Lowest false positive rate, but pro tier lacks web scanning.
Best forSecurity consultants and IT admins needing point-in-time vulnerability scans.
Vulnerability scanner with over 198,000 plugins, trusted as the industry gold standard.
Plans
No web app scanning
Adds web app scanning
Source: underdefense.com
Upside
- 198,000+ plugin vulnerability library
- Industry's lowest false positive rate
- 450+ compliance report templates
Catch
- Slow scans on large networks
- Web scanning needs Expert tier
- No centralized fleet management in Pro
Editor's takeNessus holds the top vulnerability coverage score in the category, with over 198,000 plugins and what independent reviewers call the industry's lowest false positive rate. Its VPR technology filters out roughly 97% of vulnerabilities that pose no immediate threat, cutting alert fatigue. The catches are cost and scope: Professional runs about $3,390 a year but lacks web app scanning and centralized management, both of which require upgrading to Expert or Tenable.io.
How much does Nessus cost?
Nessus Professional costs approximately $3,390 per year, while Nessus Expert runs about $5,890 per year, according to pricing data from Underdefense's 2025 guide.
Does Nessus scan web applications?
Only in the Expert tier. Nessus Professional has severely limited web application scanning and external attack surface discovery, requiring an upgrade for full coverage.












