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CleanBrowsing vs Quad9: catalog facts
CleanBrowsing	Quad9
Freemium Free family filters, with paid plans for more control.	Free The public resolvers are free to use.
Web	Windows, macOS, Linux, Android, iOS
Blocks malware, phishing and botnet domains Adult content blocking and enforced Safe Search	Malicious domain blocking with no configuration and no account Non-profit, Swiss-based, with a published no-client-IP-logging policy
DNS queries are sent to a third-party service DNS filtering can be bypassed by changing a device's DNS settings	Blocking is security-focused only; it does not block advertising No per-device customisation on the free public resolvers
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
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 22, 2026

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