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AdGuard DNS vs CIRA Canadian Shield: catalog facts
AdGuard DNS	CIRA Canadian Shield
Freemium The public resolvers are free. Private DNS accounts with custom rules are paid beyond a…	Free Free, provided by a national not-for-profit.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Android, iOS, Browser extension
Works through Android Private DNS with no app to install Supports DNS-over-QUIC as well as the usual encrypted transports	Blocks phishing, malware, botnets and scam sites Optional adult content filtering for families
Filtering happens on their servers, so they see your lookups Custom rules and statistics need a paid account beyond a small free tier	Built primarily for Canadian users No custom blocklists or per-domain control described
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.