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CIRA Canadian Shield vs Quad9 Connect: catalog facts
CIRA Canadian Shield	Quad9 Connect
Free Free, provided by a national not-for-profit.	Free Free and open source; the Quad9 DNS service is also free.
Windows, macOS, Android, iOS, Browser extension	Android
Blocks phishing, malware, botnets and scam sites Optional adult content filtering for families	Official app from Quad9 Works on Android and ChromeOS
Built primarily for Canadian users No custom blocklists or per-domain control described	Tied to the Quad9 DNS service No iOS or desktop version
Downloadable app, Hosted service, Browser extension	Downloadable app
Closed source	Open source
License not stated	License: AGPL-3.0-or-later
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

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