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theHarvester vs Amass: catalog facts
theHarvester	Amass
Free The open-source software is available without a license fee. Hosting, hardware and…	Free The software is free under its open-source licence. Hosting, hardware and external…
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Combines several public-data sources into structured results.	It combines passive open-source intelligence with active reconnaissance and stores the results in a graph database you…
Some sources need API credentials and may return incomplete data.	Active reconnaissance touches the target directly, so it must only be pointed at systems you are authorised to…
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: Apache-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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