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Quad9 vs NextDNS: catalog facts
Quad9	NextDNS
Free The public resolvers are free to use.	Freemium A free tier with a monthly query allowance is available. Paid plans remove the limit.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Linux, Android, iOS
Malicious domain blocking with no configuration and no account Non-profit, Swiss-based, with a published no-client-IP-logging policy	Very granular blocklists and per-device profiles with detailed analytics Encrypted DNS support on every platform, including router-level setup
Blocking is security-focused only; it does not block advertising No per-device customisation on the free public resolvers	Filtering happens on their infrastructure, so they resolve your queries The free tier is limited to a monthly query allowance
Hosted service	Hosted service
Closed source	Closed source
License not stated	License not stated
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.