head to head · open source
xxl-job vs harmonist
xxl-job has 30,566 GitHub stars, 11,490 forks, 79 open issues and last shipped 2 months ago. harmonist has 2,257 stars, 206 forks, 1 open issues and last shipped 3 months ago. xxl-job leads on adoption by 1,254% (30,566 vs 2,257 stars). xxl-job is written in Java under GPL-3.0; harmonist is written in Python under MIT. xxl-job has attracted 38% as many forks as stars, harmonist 9%. xxl-job 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
| xxl-job | harmonist | |
|---|---|---|
| GitHub stars | ★ 31K | ★ 2.3K |
| License | GPL-3.0 | MIT |
| Written in | Java | Python |
| Last push | 2026-07-21 | 2026-06-09 |
| Forks | ⑂ 11K | ⑂ 206 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick xxl-job if
- You weight community size — 31K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches Java
- You value the larger contributor base for long-term maintenance
pick harmonist if
- You want the harmonist feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and harmonist fits your workflow better
About xxl-job
XXL JOB is a distributed task scheduling framework written in Java and released under the GPL 3.0 licence, built for teams that need scheduled jobs to run reliably across a cluster of machines rather than inside a single application process.
read the full xxl-job overview →
About harmonist
harmonist is an MIT licensed, dependency free Python framework that adds multi agent orchestration and mechanically enforced protocol to AI coding assistants such as Cursor, Claude Code, Copilot, Windsurf, and Aider, and it serves individual developers and teams who need agent workflows to obey engineering rules rather than merely be asked to follow them.
read the full harmonist overview →
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Frequently asked questions
Is xxl-job or harmonist more popular?
xxl-job has 30,566 GitHub stars and harmonist has 2,257. xxl-job has the larger community by that measure.
Are xxl-job and harmonist free?
Both are open source. xxl-job is licensed under GPL-3.0 and harmonist under MIT. Neither carries a licence fee.
What is the difference between xxl-job and harmonist?
xxl-job is written in Java and harmonist in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, xxl-job or harmonist?
Choose xxl-job if you want the larger community (30,566 stars) or its GPL-3.0 licence terms. Choose harmonist if its feature set, stack or MIT licence fits better. Both are self-hostable.