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OpenDoor vs theHarvester: catalog facts
OpenDoor	theHarvester
Best for: Security testers assessing web assets they own or have permission to test	Best for: Collect public information about domains during authorized research
Free Free and open source under GPL-3.0.	Free The open-source software is available without a license fee. Hosting, hardware and external services are separate.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Combines directory discovery, subdomain enumeration, and bounded crawling Includes response filtering and reporting workflows All 3 strengths for OpenDoor Combines directory discovery, subdomain enumeration, and bounded crawling Includes response filtering and reporting workflows Supports Linux, macOS, and Windows	Combines several public-data sources into structured results.
Intended for authorized testing	Some sources need API credentials and may return incomplete data.
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-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 Sources for OpenDoor github.com/stanislav-web/OpenDoor Catalog checked October 8, 2026	Official website Full listing and sources Sources for theHarvester github.com/laramies/theHarvester github.com/laramies/theHarvester/blob/master/LICENSE Catalog checked September 22, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.