Compare software

sdns vs Unbound: catalog facts
sdns	Unbound
Free Free to use from its GitHub repository.	Free Free and open source under the BSD licence.
Linux, Self-hosted, Command line	Windows, macOS, Linux, Self-hosted
Full recursive resolution without a public upstream Built-in blocklist filtering	DNSSEC validation and encrypted transports in a small, audited resolver Runs recursively, so no upstream resolver sees your queries
Configured by file with no graphical interface Smaller community than Unbound or Pi-hole	Configuration is a text file with many options No filtering or blocklists of its own; that needs another layer
Self-hosted	Self-hosted
Closed source	Open source
License not stated	License: BSD-3-Clause
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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