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AdGuard Home vs SmartDNS: catalog facts
AdGuard Home	SmartDNS
Free Free and open source under the GPL 3.0. AdGuard also sells a hosted AdGuard DNS service…	Free Free to use, with source code published on GitHub.
Windows, macOS, Linux, Web, Self-hosted	Linux, Self-hosted
Acts as a DNS-over-HTTPS, DNS-over-TLS and DNS-over-QUIC server itself One binary with a web interface, so installation is straightforward	Picks the fastest upstream answer rather than the first reply Supports DoT, DoH, DoQ and DoH3 upstreams
Run by a company that also sells blocking products, so the free tier is marketing Over-blocking breaks sites, as with any DNS blocker	Main readme is in Chinese, with a separate English version Needs manual configuration with no graphical interface
Self-hosted	Downloadable app, Self-hosted
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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