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Nessus vs Pentest-Tools.com: catalog facts
Nessus	Pentest-Tools.com
Freemium Nessus Essentials is free for up to sixteen IP addresses. Professional is a paid…	Freemium Paid plans unlock the full toolkit; see the site for current tiers and limits.
Windows, macOS, Linux	Web
Very large and rapidly updated plugin library Configuration and compliance auditing alongside vulnerability scanning	Validates vulnerabilities with actual exploits to cut false positives Generates customizable pentest reports
Free Essentials edition is capped at sixteen IP addresses Closed source, with subscription pricing beyond the free tier	Intended for authorized testing of systems you own or have permission to test Commercial service with the full feature set behind paid plans
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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