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BIND 9 vs Knot Resolver: catalog facts
BIND 9	Knot Resolver
Free Free and open source under the Mozilla Public License 2.0.	Free Free to download and use under the GPL.
macOS, Linux, Self-hosted, Command line	Linux, Self-hosted
dig is a standard tool for DNS troubleshooting Full-featured DNS server with DNSSEC	Small core with features in optional C and Lua modules Scales from home routers to large deployments
dig comes as part of the larger BIND package Server configuration has a steep learning curve	Configured by hand, with no graphical dashboard Some newer features, such as unencrypted DoH mode, are still alpha
Downloadable app, Self-hosted	Self-hosted
Open source	Open source
License: MPL-2.0	License: GPL
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.