Sites like Quad9

01 · Entity

About Quad9

Quad9 quad9.net

Quad9 | A public and free DNS service for a better security and privacy

A public and free DNS service for a better security and privacy

Wikidata: DNS service

Top 10K · #4,020 English 5 technologies Crawled Nov 6, 2026

Visit Quad9

Summary by Claude

Quad9 is a free public recursive DNS resolver that blocks lookups of known malicious domains (malware, phishing, botnets), does not log users' IP addresses, and supports encrypted DNS. It is operated by a Swiss nonprofit foundation.

Who it’s for

Internet users, households and organizations

Business model

Nonprofit, donations and sponsorships

• public DNS resolver
• public DNS server
• malware blocking DNS
• phishing protection
• DNS over HTTPS
• DNS over TLS
• privacy-focused DNS
• 9.9.9.9
• GDPR-compliant DNS

02 · Embedding space

Competitor map

Each alternative by how close its vector is to Quad9’s (x) and how much traffic it gets, how much of the stack it shares, or where it sits in the embedding space itself (y). Lines split each axis at the median. Hover for the numbers, click to jump to it in the list.

1. 01
   NextDNS nextdns.io Top 10K English

   NextDNS - The new firewall for the modern Internet

   NextDNS protects you from all kinds of security threats, blocks ads and trackers on websites and in apps and provides a safe and supervised Internet for kids — on all devices and on all networks.

   • Google Search Console
   • Zendesk
   • Cloudflare
   • Cloudflare DNS
   • Google Workspace
   • Next.js

   0 say NextDNS is a good alternative to Quad9 0 say NextDNS isn’t a real alternative to Quad9

   Comment
   Very close cos 0.897
2. 02
   AdGuard DNS adguard-dns.com Top 10K English

   AdGuard DNS — ad-blocking DNS server

   Create your ad-blocking DNS server that will protect your personal data, prevent tracking and allow you to control access to specific content on the Internet.

   • Google Search Console
   • Zendesk
   • Amazon SES
   • Cloudflare
   • Cloudflare DNS
   • Google Workspace

   0 say AdGuard DNS is a good alternative to Quad9 0 say AdGuard DNS isn’t a real alternative to Quad9

   Comment
   Very close cos 0.894
3. 03
   NLnet Labs nlnetlabs.nl Top 10K English

   NLnet Labs - Home

   Research & Development, Internet architecture, DNS, Routing, Stability and Security.

   • nginx
   • Adobe Fonts
   • Bootstrap
   • Font Awesome
   • Google Workspace
   • jQuery

   0 say NLnet Labs is a good alternative to Quad9 0 say NLnet Labs isn’t a real alternative to Quad9

   Comment
   Close cos 0.888
4. 04
   OpenDNS opendns.com Top 1K

   company

   • Google Search Console
   • Zendesk
   • Amazon SES
   • DocuSign

   0 say OpenDNS is a good alternative to Quad9 0 say OpenDNS isn’t a real alternative to Quad9

   Comment
   Close cos 0.884
5. 05
   Let's Encrypt letsencrypt.org Top 10K English

   Let's Encrypt

   Let's Encrypt is a free, automated, and open Certificate Authority brought to you by the nonprofit Internet Security Research Group (ISRG). Read all about our work in our Annual Report.

   • Zendesk
   • Cloudflare DNS
   • Font Awesome
   • Google Workspace
   • Netlify

   0 say Let's Encrypt is a good alternative to Quad9 0 say Let's Encrypt isn’t a real alternative to Quad9

   Comment
   Close cos 0.878
6. 06
   Dynu dynu.com Top 10K English

   Free dynamic DNS service | Dynu Systems, Inc.

   Dynu Systems, Inc. provides free dynamic DNS service as well as other services such as domain registration, email and SSL services.

   • Google Search Console
   • ASP.NET
   • Bing Webmaster Tools
   • Google Analytics
   • Google Fonts
   • Yandex Webmaster

   0 say Dynu is a good alternative to Quad9 0 say Dynu isn’t a real alternative to Quad9

   Comment
   Close cos 0.881
7. 07
   Duck DNS duckdns.org Top 1K

   Duck DNS

   Duck DNS free dynamic DNS hosted on Amazon VPC

   • Google Search Console
   • nginx
   • Amazon Web Services
   • Google Analytics
   • Google Workspace
   • Java

   0 say Duck DNS is a good alternative to Quad9 0 say Duck DNS isn’t a real alternative to Quad9

   Comment
   Close cos 0.877
8. 08
   No-IP ddns.net Top 1K English

   Free Dynamic DNS | No-IP Free DDNS Service

   Get free Dynamic DNS from No-IP. Point an easy-to-remember hostname to your dynamic IP — no credit card, no hassle.

   • Google Search Console
   • nginx
   • Bing Webmaster Tools
   • Google Ads conversion tracking
   • Google Fonts
   • Google Tag Manager

   0 say No-IP is a good alternative to Quad9 0 say No-IP isn’t a real alternative to Quad9

   Comment
   Close cos 0.875
9. 09
   No-IP no-ip.com Top 1K English

   No-IP | Smarter DNS Starts Here

   No-IP is a Free Dynamic DNS and Managed DNS provider with 100% uptime. Get free DDNS, plus domain registration and SSL certificates, for home and business

   • Google Search Console
   • nginx
   • Zendesk
   • Bing Webmaster Tools
   • Google Ads conversion tracking
   • Google Fonts

   0 say No-IP is a good alternative to Quad9 0 say No-IP isn’t a real alternative to Quad9

   Comment
   Close cos 0.874
10. 10
    Spamhaus spamhaus.org Top 1K English

    Strengthening trust and safety across the internet | Spamhaus

    Strengthening trust and safety online through IP and domain reputation intelligence, expertise, education, and community collaboration.

    • Google Search Console
    • Slack
    • Algolia
    • Cloudflare
    • Google Fonts
    • Google Tag Manager

    0 say Spamhaus is a good alternative to Quad9 0 say Spamhaus isn’t a real alternative to Quad9

    Comment
    Close cos 0.870
11. 11
    ifconfig.me Top 10K English

    What Is My IP Address? - ifconfig.me

    Get my IP Address

    • Google Search Console
    • Google Cloud
    • Google Cloud DNS
    • Google Fonts

    0 say ifconfig.me is a good alternative to Quad9 0 say ifconfig.me isn’t a real alternative to Quad9

    Comment
    Close cos 0.871
12. 12
    ddnss.de Top 1K German

    DDNS - Service • Kostenloser DynDNS Service • Deutscher DynDNS Dienst Anbieter

    DynDNS Service (Dynamic Domain Name Service) ist ein Service, über den ein Computer trotz wechselnder IP-Adresse immer unter demselben Domänennamen erreichbar ist.

    • Apache HTTP Server
    • Bootstrap
    • Font Awesome
    • Google Analytics
    • jQuery
    • PHP

    0 say ddnss.de is a good alternative to Quad9 0 say ddnss.de isn’t a real alternative to Quad9

    Comment
    Close cos 0.871
13. 13
    OVHcloud ovhcloud.com Top 10K English

    OVHcloud

    OVHcloud is a global, cloud provider delivering hosted private cloud, public cloud, and dedicated server solutions trusted by over 1.5 million developers.

    • Google Search Console
    • Apple Business
    • DocuSign
    • Drupal
    • Meta Business Suite
    • Microsoft 365

    0 say OVHcloud is a good alternative to Quad9 0 say OVHcloud isn’t a real alternative to Quad9

    Comment
    Close cos 0.870
14. 14
    ngenix.net Top 1K Russian

    Доступ к сайту временно ограничен владельцем веб-ресурса.

    • Google Search Console
    • nginx
    • GlobalSign
    • Yandex Mail
    • Yandex Webmaster

    0 say ngenix.net is a good alternative to Quad9 0 say ngenix.net isn’t a real alternative to Quad9

    Comment
    Close cos 0.869
15. 15
    ClouDNS cloudns.net Top 1K English

    Free DNS hosting, Cloud DNS hosting and Domain names | ClouDNS

    ClouDNS provides Free DNS, Cloud DNS, Managed DNS, GeoDNS and DDoS Protected DNS hosting with included web redirects, mail forwards and Round-Robin load balancing. Instant updates in Europe, North and South America, Asia and Australia.

    • Google Search Console
    • nginx
    • Google Analytics
    • Google Workspace
    • jQuery

    0 say ClouDNS is a good alternative to Quad9 0 say ClouDNS isn’t a real alternative to Quad9

    Comment
    Close cos 0.869
16. 16
    squid-cache.org Top 10K

    squid : Optimising Web Delivery

    proxy server and web cache daemon

    • Google Search Console
    • Apache HTTP Server

    0 say squid-cache.org is a good alternative to Quad9 0 say squid-cache.org isn’t a real alternative to Quad9

    Comment
    Close cos 0.864
17. 17
    dnspod.com Top 10K

    DNSPod-免费智能DNS解析服务商-电信_网通_教育网,智能DNS

    DNSPod是国内提供智能DNS产品的网站，致力于为各类网站提供高质量的电信、网通、教育网双线或者三线智能DNS免费解析。目前DNSPod已经是国内最大的免费DNS解析产品提供商

    • Google Search Console
    • Baidu Analytics
    • Google Ads conversion tracking
    • Google Analytics
    • Google Tag Manager

    0 say dnspod.com is a good alternative to Quad9 0 say dnspod.com isn’t a real alternative to Quad9

    Comment
    Close cos 0.866
18. 18
    Internet Systems Consortium isc.org Top 10K

    development and dissemination of internet software and tools

    • Google Search Console
    • Mailchimp
    • GlobalSign
    • Salesforce

    0 say Internet Systems Consortium is a good alternative to Quad9 0 say Internet Systems Consortium isn’t a real alternative to Quad9

    Comment
    Close cos 0.864
19. 19
    EU.org eu.org Top 10K

    EU.org: free domain names since 1996

    Free domain names

    • Google Search Console
    • Apache HTTP Server

    0 say EU.org is a good alternative to Quad9 0 say EU.org isn’t a real alternative to Quad9

    Comment
    Close cos 0.865
20. 20
    Syncthing syncthing.net Top 10K English

    Syncthing

    open source continuous file synchronization software

    • Bootstrap
    • cdnjs
    • Fastly
    • Font Awesome
    • GitHub Pages
    • Hetzner DNS

    0 say Syncthing is a good alternative to Quad9 0 say Syncthing isn’t a real alternative to Quad9

    Comment
    Close cos 0.864

Ranked by score: the cosine similarity of each site’s vector to quad9.net’s, less a small penalty for generic sites that are close to everything. Highlighted technologies are ones Quad9 uses too. Votes and comments come from visitors and don’t change the ranking.

04 · Fingerprints

Technology

What Quad9 is built with, and what its closest competitors use, from its homepage’s code and its DNS records.