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Medusa vs Sonarr: catalog facts
Medusa	Sonarr
Free Free to download and run on your own server.	Free Free and open source under the GPL. Indexers and Usenet providers you connect it to may…
Self-hosted	Windows, macOS, Linux, Self-hosted
Tracks shows and fetches new episodes automatically Self-hosted, with a Dockerfile in the repository	Scans an existing library and fills in missing episodes automatically Upgrades files when a better quality release appears, without being asked
Needs a server and download sources set up by you Focused on TV shows only	Useless on its own; it needs indexers and a download client Indexers and Usenet access usually cost money
Self-hosted	Downloadable app, Self-hosted
Open source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 21, 2026

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