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Supysonic vs Polaris: catalog facts
Supysonic	Polaris
Free Free and open source.	Free Free and open source.
Self-hosted	Web, Self-hosted
Works with Subsonic-compatible clients Transcoding for various audio formats	Written in Rust Web client plus an API for other clients
No bundled player app Smaller community than Navidrome or Airsonic	Music only, no video support Requires running your own server
Self-hosted	Self-hosted
Open source	Open source
License: AGPL-3.0	License not stated
Not stated if an account is 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 September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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