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

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