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
   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
5. 05
   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
6. 06
   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
7. 07
   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
8. 08
   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
9. 09
   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
10. 10
    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
11. 11
    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
12. 12
    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
13. 13
    changeip.com Top 10K English

    Dynamic DNS, VPS Hosting and More

    • Google Search Console
    • nginx
    • Google Ads conversion tracking
    • Google Analytics
    • Google Fonts
    • Google Workspace

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

    Comment
    Close cos 0.868
14. 14
    afraid.org Top 10K English

    FreeDNS - Free DNS - Dynamic DNS - Static DNS subdomain and domain hosting

    Free DNS hosting, lets you fully manage your own domain. Dynamic DNS and Static DNS services available. You may also create hosts off other domains that we host upon the domain owners consent, we have several domains to choose from!

    • nginx

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

    Comment
    Close cos 0.866
15. 15
    CISA cisa.gov Top 10K English

    Home Page | CISA

    Cybersecurity and Infrastructure Security Agency: America's Cyber Defense Agency

    • Google Search Console
    • Adobe
    • Atlassian
    • Drupal
    • Google Fonts
    • Google Tag Manager

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

    Comment
    Close cos 0.864
16. 16
    DOI.org query endpoint doi.org Top 1K English

    Home Page

    API endpoint

    • Amazon SES
    • Bootstrap
    • Cloudflare
    • Cloudflare DNS
    • Amazon CloudFront
    • Font Awesome

    0 say DOI.org query endpoint is a good alternative to Quad9 0 say DOI.org query endpoint isn’t a real alternative to Quad9

    Comment
    Close cos 0.862
17. 17
    EuroDNS eurodns.com Top 10K English

    EuroDNS: Domains, Hosting & Web Essentials All In One Place

    Find a domain, launch your website, and make it happen with us! From hosting, to SSL, to branded email: EuroDNS has everything you need in one place.

    • Google Search Console
    • Mailchimp
    • Apple Business
    • Atlassian
    • GlobalSign
    • Google Fonts

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

    Comment
    Close cos 0.865
18. 18
    Cloudflare cloudflare.com Top 100 English

    Cloudflare: Build for the agent era

    Welcome to Cloudflare - Powering the next generation of applications

    • Google Search Console
    • Zendesk
    • Apple Business
    • Astro
    • Atlassian
    • Canva

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

    Comment
    Close cos 0.862
19. 19
    Drupal drupal.org Top 10K English

    Client Challenge

    free and open-source web content management system

    • Google Search Console
    • Mailchimp
    • Amazon SES
    • Atlassian
    • Fastly
    • GlobalSign

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

    Comment
    Close cos 0.862
20. 20
    DNS Made Easy dnsmadeeasy.com Top 1K English

    Managed DNS Business Services & Solutions Provider | a DigiCert Company

    DNS Made Easy powered by DigiCert provides high-performance managed DNS services with 100% uptime, low-latency resolution, enhanced security, and simplified DNS management.

    • Google Search Console
    • Zendesk
    • Adobe Experience Manager
    • Adobe Experience Platform Tags
    • Google Workspace
    • Imperva

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

    Comment
    Close cos 0.860

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.