Knot DNS

knot-dns.cz · checked 3 Oct 2026

#6 · DNS Server Software

Visit knot-dns.cz ↗ Alternatives Knot DNS vs Technitium DNS Server

How it plugs in

—Public API

NoOpen source

YesFree tier

Signal on DNS Server Software6.1#6 of 23

Knot DNS is a high-performance open-source server for authoritative DNS, suitable for TLDs and other zones.

Pricing

Knot DNSFree to download and use · Open-source authoritative DNS server · professional support programmes available separatelyFree

As knot-dns.cz lists them, checked 3 Oct 2026.

Near it

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Runs on

Web
Windows
Mac
Linux
iOS
Android

Facts

Website: knot-dns.cz
Price: Free tier
Free trial: No
Configuration and modules: It supports YAML or database-based configuration and dynamically loaded query-processing modules.
Deployment: The software can be compiled and run on most UNIX-like systems, including Linux, BSD, and macOS.
DNSSEC: It supports DNSSEC with NSEC and NSEC3, multithreaded zone signing and validation, and automatic DNSSEC key management.
Founded: 1998
Headquarters: Prague, Czech Republic
License: The current documentation states that Knot DNS is licensed under GNU GPL version 2.0 or later.
Maker: The project is primarily sponsored by CZ.NIC, and its contact page lists the organization’s address in Prague, Czech Republic.
Protocols: It supports DNS over UDP, TCP, TLS 1.3, and QUIC.
Release lifecycle: The download page lists Knot DNS 3.6.0, released September 8, 2026, with end of life in Q3 2028.
Resource planning: The documentation estimates memory needs at roughly three times the plain-text zone size and advises measurement before production deployment.
Security features: Its modules include response rate limiting, while TLS 1.3 and QUIC support opportunistic, strict, and mutual authentication profiles.
Server roles: It supports primary and secondary server operation.

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