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Gelly vs Plexamp: catalog facts
Gelly	Plexamp
Free Free and open source under the GPL-3.0-or-later.	Freemium Free to use, with some features reserved for paid Plex Pass subscribers.
Linux, Command line	Windows, macOS, Linux, Android, iOS
Supports both Jellyfin and Subsonic servers Gapless playback and ReplayGain	Dedicated music player built around a Plex library Available on desktop and mobile platforms
Needs your own Jellyfin or Subsonic-compatible server Linux only	Depends on a Plex Media Server holding your music Some features require a paid Plex Pass
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0-or-later	License not stated
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 1, 2026	Official website Full listing and sources Checked September 23, 2026

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