head to head · open source
haystack vs openchoreo
haystack has 26,559 GitHub stars, 3,153 forks, 143 open issues and last shipped yesterday. openchoreo has 1,576 stars, 249 forks, 269 open issues and last shipped yesterday. haystack leads on adoption by 1,585% (26,559 vs 1,576 stars). haystack is written in Python under Apache-2.0; openchoreo is written in Go under Apache-2.0. haystack has attracted 12% as many forks as stars, openchoreo 16%. openchoreo was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ai-agents), 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 | openchoreo | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 1.6K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Go |
| Last push | 2026-09-19 | 2026-09-19 |
| Forks | ⑂ 3.2K | ⑂ 249 |
| 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 openchoreo if
- You want the openchoreo feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and openchoreo 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 openchoreo
OpenChoreo is an open source internal developer platform for Kubernetes. It is built for developers, platform engineers, and AI agents that need to build, deploy, and operate applications, resources, and agentic workloads on Kubernetes. The project lives in the Kubernetes ecosystem and is described as a complete developer platform rather than a collection of separate tools.
read the full openchoreo overview →
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Frequently asked questions
Is haystack or openchoreo more popular?
haystack has 26,559 GitHub stars and openchoreo has 1,576. haystack has the larger community by that measure.
Are haystack and openchoreo free?
Both are open source. haystack is licensed under Apache-2.0 and openchoreo under Apache-2.0. Neither carries a licence fee.
What is the difference between haystack and openchoreo?
haystack is written in Python and openchoreo in Go. 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 openchoreo?
Choose haystack if you want the larger community (26,559 stars) or its Apache-2.0 licence terms. Choose openchoreo if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.