Quad9

Quad9 is a fiercely respected, globally omnipresent non-profit leviathan that holds absolute mathematical sovereignty over the "Public Free Security DNS" market. Founded by IBM, Packet Clearing House, and the Global Cyber Alliance, Quad9 (9.9.9.9) is mathematically engineered to be a public utility. It is the absolute weapon of choice for users and organizations in developing nations who need enterprise-grade malware blocking but cannot afford commercial software. Its signature feature is "The Multi-Threat Intelligence Math." A commercial vendor only uses its own threat intelligence. Quad9 mathematically aggregates data from over 20 of the world's most terrifyingly advanced cybersecurity firms (IBM X-Force, F-Secure, Cisco). When a user queries 9.9.9.9, Quad9 mathematically cross-references the domain against all 20 databases simultaneously in milliseconds. If any vendor flags it as ransomware, Quad9 mathematically drops the connection, executing unprecedented collective security. It heavily dominates "Absolute Privacy Mathematics." Commercial DNS providers secretly mine your DNS queries to sell behavioral profiles to advertisers. Quad9 mathematically annihilated this. They operate as a Swiss non-profit foundation bound by terrifyingly strict Swiss privacy laws. They execute absolute zero-logging. They mathematically do not collect, store, or sell the IP addresses of the people using their service, guaranteeing absolute cryptographic privacy while still providing massive malware protection.