Quad9 has goal Internet privacy
Security and privacy
Several independent evaluations have found Quad9 to be the most effective (97%) at blocking malware and phishing domains. 
As of June, 2021, Quad9 was blocking more than 100 million malware infections and phishing attacks per day. Quad9's malware filtering is a user-selectable option. The domains which are filtered are not determined by Quad9, but instead supplied to Quad9 by a variety of independent threat-intelligence analysts, using different methodologies. Quad9 uses a reputation-scoring system to aggregate these sources, and removes "false positive" domains from the filter list, but does not itself add domains to the filter list.Quad9 was the first to use standards-based strong cryptography to protect the privacy of its users' DNS queries, and the first to use DNSSEC cryptographic validation to protect users from domain name hijacking. Quad9 protects users' privacy by not retaining or processing the IP address of its users, and is consequently GDPR-compliant.