14 open-source DNS Privacy & Filtering vendors.

Open-source software for DNS Privacy & Filtering that you can self-host, with auditable source code — regardless of the developer's headquarters.

• AdGuard HomeSelf-hosted / open source

  Open-source DNS server for blocking ads and tracking at network level

  Cyprus

• BlockySelf-hosted / open source

  Lightweight open-source DNS proxy and blocker written in Go

  Germany

• DNS.SBSelf-hosted / open source

  German privacy-first DNS resolver (xTom GmbH, Düsseldorf) with no query or IP logging.

  Germany

• dnscrypt-proxySelf-hosted / open source

  Open-source DNS proxy with support for encrypted DNS protocols

  France

• dnsmasqSelf-hosted / open source

  Dnsmasq is a lightweight, self-hosted DNS forwarder/cache with an integrated DHCP server, actively maintained by Simon Kelley (UK), with a 2.93 release in 2026.

  United Kingdom

• Freifunk München DNSEU sovereign

  Free, filter-free DNS resolver run by the German non-profit Freifunk München, hosted entirely within the EU (Munich and Vienna) with DoH/DoT/DoQ support.

  Germany

• LibreDNSSelf-hosted / open source

  Greek encrypted, GDPR-compliant DNS service from the non-profit LibreOps e.V., with zero logging.

  Greece

• Pi-holeNon-EU vendor

  Open-source network-wide ad and tracker blocking via DNS

  United States

• Rethink DNSSelf-hosted / open source

  Indian open-source DNS client and resolver service (Celzero Pvt Ltd) with firewall and VPN features.

  India

• SmartDNSSelf-hosted / open source

  SmartDNS is a self-hosted local DNS server that picks the fastest-responding IP among several upstream resolvers (DoT/DoH/DoQ), actively maintained with releases through 2026, originating from China.

  China

• StubbySelf-hosted / open source

  Stubby is a self-hosted DNS Privacy stub resolver (DNS-over-TLS) from the getdns team/Sinodun IT (UK); development has slowed to low-maintenance mode since mid-2025 but the project is not abandoned.

  United Kingdom

• Technitium DNSNon-EU vendor

  Open-source DNS server with DNSSEC, DNS-over-HTTPS and ad blocking

  India

• UnboundSelf-hosted / open source

  Open-source validating, recursive and caching DNS resolver by NLnet Labs

  Netherlands

• UncensoredDNS (Censurfridns)EU sovereign

  Individually-run, filter-free DNS resolver from Denmark offering anycast and unicast service since 2009, with no logging or censorship.

  Denmark