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Quad9 protects individuals, businesses, hospitals, schools, governments, and entire networks — with the same technology, at zero cost to end users. Find out how it works for you. Whether you’re securing a single device at home or an entire network serving thousands, the setup is the same: two DNS addresses, a few minutes, and protection that works in the background from that point on. The sections below cover what Quad9 looks like in practice for different types of users — and how to get started wherever you are. Most DNS services were built to be fast. Quad9 was built to be secure. Here’s what makes it different — and why that difference matters for anyone who connects to the internet. One change to your router. Protection for every device on your network — phones, laptops, smart TVs, connected appliances. No software to install. No subscription. Nothing to manage. Ransomware, phishing, and business email fraud are the most common and costly attacks facing organizations today. Quad9 blocks them at the DNS level — before they reach your network, your staff, or your customers. Public institutions and critical services are among the most targeted — and the least resourced for cybersecurity. Quad9 provides the same protection available to large enterprises, at no cost to the organizations that need it most. Deploy Quad9 at the network level and extend threat protection to every device that connects — including those that can’t run their own security software. Quad9 integrates with existing infrastructure and supports encrypted DNS protocols. Quad9’s threat intelligence is powered by a global network of cybersecurity partners. If your organization identifies and tracks malicious domains, contributing your data means protecting millions of users — in real time, around the world. Quad9 is a nonprofit. The service is free because of the organizations and individuals who fund it. Sponsorship supports infrastructure, threat intelligence partnerships, and expansion into underserved regions where the need for protection is greatest.
Free DNS security
for anyone who uses the internet.
Get Started with Quad9
Why Quad9
Quad9 for Home
Quad9 for Businesses & Organizations
Quad9 for Governments, Schools & Healthcare
Quad9 for Network Operators
Partner with Quad9
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