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NSD vs Technitium DNS Server: catalog facts
NSD	Technitium DNS Server
Free Free and open source under the BSD license; paid support is available.	Free Free and open source under the GPL.
Linux, Self-hosted	Windows, macOS, Linux, Self-hosted
Very high query throughput Used by DNS root servers and TLD registries	Authoritative and recursive in one server, so it hosts your zones and resolves everything else Blocks ads and malware for every device on the network without per-device setup
Authoritative only, with no recursive resolver Aimed at operators comfortable with DNS server configuration	Considerably more complex than Pi-hole if all you want is ad blocking Running your own DNS means DNS outages become your problem
Downloadable app, Self-hosted	Self-hosted, Downloadable app
Open source	Open source
License: BSD	License: GPL-3.0
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 21, 2026

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