head to head · open source
Jellyfin vs JJazzLab
Jellyfin has 57,271 GitHub stars, 5,527 forks, 684 open issues and last shipped yesterday. JJazzLab has 590 stars, 48 forks, 26 open issues and last shipped 8 days ago. Jellyfin leads on adoption by 9,607% (57,271 vs 590 stars). Jellyfin is written in C# under GPL-2.0; JJazzLab is written in Java under LGPL-2.1. Jellyfin has attracted 10% as many forks as stars, JJazzLab 8%. Jellyfin was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Jellyfin | JJazzLab | |
|---|---|---|
| GitHub stars | ★ 57K | ★ 590 |
| License | GPL-2.0 | LGPL-2.1 |
| Written in | C# | Java |
| Last push | 2026-09-18 | 2026-09-11 |
| Forks | ⑂ 5.5K | ⑂ 48 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Jellyfin if
- You weight community size — 57K stars and counting
- You want the GPL-2.0 license terms
- Your stack matches C#
- You value the larger contributor base for long-term maintenance
pick JJazzLab if
- You want the JJazzLab feature set and don't need the biggest community
- You prefer the LGPL-2.1 license terms
- Your stack matches Java
- You evaluated both and JJazzLab fits your workflow better
About Jellyfin
Jellyfin is a free and open source media server that lets an individual or an organisation manage and stream their own movies, music, and other media from a dedicated server to end user devices through multiple client apps.
read the full Jellyfin overview →
About JJazzLab
JJazzLab is a free, open source, cross platform desktop application for automatic backing track generation — you enter chord symbols, pick a music style, and it produces a full arrangement with drums, bass, guitar, piano and strings — built for musicians who want a band to practise with, teachers, and composers working at an early stage.
read the full JJazzLab overview →
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Frequently asked questions
Is Jellyfin or JJazzLab more popular?
Jellyfin has 57,271 GitHub stars and JJazzLab has 590. Jellyfin has the larger community by that measure.
Are Jellyfin and JJazzLab free?
Both are open source. Jellyfin is licensed under GPL-2.0 and JJazzLab under LGPL-2.1. Neither carries a licence fee.
What is the difference between Jellyfin and JJazzLab?
Jellyfin is written in C# and JJazzLab in Java. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Jellyfin or JJazzLab?
Choose Jellyfin if you want the larger community (57,271 stars) or its GPL-2.0 licence terms. Choose JJazzLab if its feature set, stack or LGPL-2.1 licence fits better. Both are self-hostable.