Quad9 is a free public resolver run by a Swiss nonprofit foundation whose stated purpose is improving user privacy and security. Its headline feature is threat blocking: it checks each lookup against threat intelligence from more than 20 security firms and refuses known malware, phishing, and botnet domains. It supports DoH, DoT, and DNSCrypt and Quad9 says it never logs data containing your IP address. Because it is a Zurich-based foundation, your queries fall under Swiss privacy law regardless of where you live. It is a set-and-forget malware filter rather than a configurable ad blocker, there are no custom blocklists or dashboards.
Quad9
Nonprofit Swiss resolver that blocks malicious domains by default.
quad9.net
FreeE2E EncryptedWebSwitzerland
Pricing Free.
Strengths
- Blocks malware and phishing domains by default
- Run by a Swiss nonprofit foundation
- No IP-identifying logs; strong jurisdiction
Considerations
- No ad blocking or custom rules
- You still trust one operator with your lookups
Listed in DNS
