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

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