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CIRA Canadian Shield vs Control D: catalog facts
CIRA Canadian Shield	Control D
Free Free, provided by a national not-for-profit.	Freemium A free tier is available. Paid plans are charged per endpoint.
Windows, macOS, Android, iOS, Browser extension	Windows, macOS, Linux, Android, iOS
Blocks phishing, malware, botnets and scam sites Optional adult content filtering for families	Per-device profiles and very granular per-service rules Encrypted DNS with apps for every major platform
Built primarily for Canadian users No custom blocklists or per-domain control described	Filtering happens on their infrastructure, so they see your lookups Most useful features are behind a paid plan
Downloadable app, Hosted service, Browser extension	Downloadable app, 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 24, 2026	Official website Full listing and sources Checked September 22, 2026

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