Quad9

A DNS service for better privacy and security operated by a Swiss non-profit.

European Ad-Free Open Source Privacy Friendly No Registration Free of Charge
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Description

Quad9 is a global, non-profit public DNS resolver operated by the Quad9 Foundation, headquartered in Zurich, Switzerland. Its primary mission is to enhance internet security and privacy for users worldwide. Quad9 stands out by blocking connections to known malicious domains (such as those involved in malware, phishing, or other cyber threats) before a device can reach them, providing a critical layer of protection for individuals and organisations.

The service supports modern encrypted DNS protocols, including DNS over HTTPS (DoH), DNS over TLS (DoT), DoQ and DNSCrypt, ensuring that DNS queries are secure and private. Quad9’s commitment to privacy is reinforced by its no-logging policy. The service is entirely free, with no registration required, and is used by tens of millions of devices globally.

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Sustainability Features of Quad9

European - Based in Europe, ensuring compliance with GDPR and European privacy and labor regulations.

Quad9 is operated by the Quad9 Foundation, a Swiss non-profit organisation. Before moving to Zurich Quad9 was located in the USA.

Ad-Free - Services that do not display advertisements to users, ensuring a cleaner and more private experience.

The services do not show ads to its users.

Open Source - Free and Open-Source Software

Quad9 has multiple open-source repositories, including its Android app, threat data and several tools.

Privacy Friendly - It does not track users unnecessarily.

Quad9 has a strict no-logging policy and is bound by Swiss privacy laws, ensuring user data is not stored or misused.

No Registration - No registration required

Users can use Quad9 without any registration or account creation.

Free of Charge - The services provided can be used for free.

Quad9 is completely free to use, with no paid tiers or query limits.

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Summary

Quad9 is a privacy-focused, ad-free, and open-source-driven DNS resolver from Europe. It offers a free, no-registration-required service with robust security features, making it a strong alternative to Big Tech DNS providers. For users seeking a secure, ethical, and transparent DNS service, Quad9 provides a compelling option.

Sustainability Score
89

More Sustainable Alternatives for DNS Resolvers

DNSForge

An independent public DNS resolver with ad, tracking and malware filters.

DNSForge does not show ads on its services.
DNSForge actively blocks ads, tracking, and malware by default.
DNSForge operates with a strict no-logging policy, ensuring user privacy and security.
Users can use DNSForge without any registration or account creation.
The service is completely free to use, funded by donations.
Website

DNS.SB

A zero-logging DNS resolver operated and hosted by xTom.

DNSForge is a public DNS resolver hosted in Germany.
DNS.SB does not block ads, but it is a free service and does not rely on advertising for revenue.
DNS.SB emphasizes a strict no-logging policy, ensuring user privacy by not storing or tracking DNS queries
Users can use DNS.SB without any registration or account creation.
DNS.SB is completely free to use
Website

Suggestions and Feedback

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