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