Quad9

By Quad9 Foundation ยท Browser and DNS filtering

About Quad9

Free nonprofit public DNS resolver that refuses lookups for domains on threat intelligence block lists.

Details

  • Free plan or free edition

    Yes

Not enough info yet on works with Microsoft 365, works with Google Workspace, managed option with human analysts, multi-tenant console for MSPs. Check the tool's own site.

Listing written by AntivirusAir, checked 2026-11-04. Report a correction or request removal. Back to browser and dns filtering.

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