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Zonemaster vs Internet.nl: catalog facts
Zonemaster	Internet.nl
Free Free to use online and free to install as open-source software.	Free Free to use online.
Web, Self-hosted	Web, Self-hosted
Tests the whole delegation path from the root down Includes DNSSEC checks	Tests website, email and connection setup in one place Covers IPv6, DNSSEC, TLS, DMARC, DANE and RPKI
Focused on DNS delegation, not email or web checks Reports assume some DNS knowledge to act on	Checks standards compliance rather than site speed or content The score reflects the project's own weighting of standards
Web application, Self-hosted	Web application, Self-hosted
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is 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.