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Zonemaster vs intoDNS: catalog facts
Zonemaster	intoDNS
Free Free to use online and free to install as open-source software.	Free Free to use in the browser.
Web, Self-hosted	Web
Tests the whole delegation path from the root down Includes DNSSEC checks	Single report covering DNS and mail servers Gives fix suggestions with links to the protocol documentation
Focused on DNS delegation, not email or web checks Reports assume some DNS knowledge to act on	Checks one domain at a time with no monitoring No DNSSEC visualization or propagation view
Web application, Self-hosted	Web application
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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