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Nessus vs Detectify: catalog facts
Nessus	Detectify
Freemium Nessus Essentials is free for up to sixteen IP addresses. Professional is a paid…	Paid Commercial service with a trial available; pricing is aimed at organisations.
Windows, macOS, Linux	Web
Very large and rapidly updated plugin library Configuration and compliance auditing alongside vulnerability scanning	Continuous discovery of external assets such as subdomains and ports Payload-based testing rather than version matching
Free Essentials edition is capped at sixteen IP addresses Closed source, with subscription pricing beyond the free tier	Intended for authorized testing of assets you own or have permission to scan Priced and built for organisations rather than individuals
Downloadable app	Hosted service
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account 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 October 1, 2026

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