head to head · open source
haystack vs bisheng
haystack has 26,559 GitHub stars, 3,153 forks, 143 open issues and last shipped yesterday. bisheng has 11,983 stars, 1,970 forks, 138 open issues and last shipped today. haystack leads on adoption by 122% (26,559 vs 11,983 stars). haystack is written in Python under Apache-2.0; bisheng is written in Python under Apache-2.0. haystack has attracted 12% as many forks as stars, bisheng 16%. bisheng was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai, genai), so they are genuine substitutes rather than adjacent tools.
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
| haystack | bisheng | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 12K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-09-19 | 2026-09-20 |
| Forks | ⑂ 3.2K | ⑂ 2.0K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick haystack if
- You weight community size — 27K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick bisheng if
- You want the bisheng 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 bisheng fits your workflow better
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 →
About bisheng
BISHENG is an open source LLM DevOps platform, licensed under Apache 2.0, for building and operating next generation enterprise AI applications, and it is aimed at organisations that need GenAI workflows, RAG, agents, and model management to run inside their own infrastructure.
read the full bisheng overview →
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Frequently asked questions
Is haystack or bisheng more popular?
haystack has 26,559 GitHub stars and bisheng has 11,983. haystack has the larger community by that measure.
Are haystack and bisheng free?
Both are open source. haystack is licensed under Apache-2.0 and bisheng under Apache-2.0. Neither carries a licence fee.
What is the difference between haystack and bisheng?
haystack is written in Python and bisheng 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, haystack or bisheng?
Choose haystack if you want the larger community (26,559 stars) or its Apache-2.0 licence terms. Choose bisheng if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.