head to head · open source
xxl-job vs haystack
xxl-job has 30,562 GitHub stars, 11,486 forks, 79 open issues and last shipped 2 months ago. haystack has 26,531 stars, 3,144 forks, 143 open issues and last shipped yesterday. xxl-job leads on adoption by 15% (30,562 vs 26,531 stars). xxl-job is written in Java under GPL-3.0; haystack is written in Python under Apache-2.0. xxl-job has attracted 38% as many forks as stars, haystack 12%. haystack 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 | haystack | |
|---|---|---|
| GitHub stars | ★ 31K | ★ 27K |
| License | GPL-3.0 | Apache-2.0 |
| Written in | Java | Python |
| Last push | 2026-07-21 | 2026-09-17 |
| Forks | ⑂ 11K | ⑂ 3.1K |
| 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 haystack if
- You want the haystack feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and haystack 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 haystack
Haystack is an open source AI orchestration framework written in Python under the Apache 2.0 licence, for building context engineered, production ready large language model applications as modular pipelines and agent workflows with explicit control over retrieval, routing, memory, and generation, and it is aimed at developers and teams building scalable agents, retrieval augmented generation, multimodal applications, semantic search, question answering, and conversational systems.
read the full haystack overview →
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Frequently asked questions
Is xxl-job or haystack more popular?
xxl-job has 30,562 GitHub stars and haystack has 26,531. xxl-job has the larger community by that measure.
Are xxl-job and haystack free?
Both are open source. xxl-job is licensed under GPL-3.0 and haystack under Apache-2.0. Neither carries a licence fee.
What is the difference between xxl-job and haystack?
xxl-job is written in Java and haystack 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 haystack?
Choose xxl-job if you want the larger community (30,562 stars) or its GPL-3.0 licence terms. Choose haystack if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.