| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| macOS | — | Yes |
| Linux | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · DNS Server Software | 7.7 (#8) | 7.7 (#9) |
| Purpose | djbdns is a collection of tools for DNS caching, serving, client lookups, and debugging. | Knot DNS is a high-performance open-source server for authoritative DNS, suitable for TLDs and other zones. |
| Support | The maker points users to the dns mailing list and says third-party commercial support is available. | Free community support is available on a best-effort basis through a mailing list, chat, and issue tracker; professional support programmes are also offered. |
