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Amass vs Censys: catalog facts
Amass	Censys
Free The software is free under its open-source licence. Hosting, hardware and external…	Freemium Free basic search with paid plans for the full platform.
Windows, macOS, Linux, Command line	Web
It combines passive open-source intelligence with active reconnaissance and stores the results in a graph database you…	Searchable map of hosts, services and TLS certificates Attack surface and adversary investigation tooling
Active reconnaissance touches the target directly, so it must only be pointed at systems you are authorised to…	Full platform is enterprise-focused with paid plans Account required to use search
Downloadable app	Hosted service
Open source	Closed source
License: Apache-2.0	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 September 23, 2026

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