Compare software

Pentest-Tools.comNessus
Freemium

Paid plans unlock the full toolkit; see the site for current tiers and limits.

 Freemium

Nessus Essentials is free for up to sixteen IP addresses. Professional is a paid…

Web Windows, macOS, Linux
  • Validates vulnerabilities with actual exploits to cut false positives
  • Generates customizable pentest reports
  • Very large and rapidly updated plugin library
  • Configuration and compliance auditing alongside vulnerability scanning
  • Intended for authorized testing of systems you own or have permission to test
  • Commercial service with the full feature set behind paid plans
  • Free Essentials edition is capped at sixteen IP addresses
  • Closed source, with subscription pricing beyond the free tier
Web application Downloadable app
Closed source Closed source
License not stated License not stated
Not stated if an account is needed Not stated if an account is needed
Needs internet Not stated if it works offline

Checked September 23, 2026

Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.