head to head · open source
haystack vs openchoreo
haystack has 26,924 GitHub stars, 3,388 forks, 143 open issues and last shipped yesterday. openchoreo has 1,759 stars, 273 forks, 269 open issues and last shipped yesterday. haystack leads on adoption by 1,431% (26,924 vs 1,759 stars). haystack is written in Python under Apache-2.0; openchoreo is written in Go under Apache-2.0. haystack has attracted 13% 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 | ★ 1.8K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Go |
| Last push | 2026-11-04 | 2026-11-04 |
| Forks | ⑂ 3.4K | ⑂ 273 |
| 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 3.0 is out! ✨🎊🎉 Read the announcement here! 🥳 🎈 🎆 🪅 🎇 🍾 🥂 🎁 🌈 Haystack is an open source AI orchestration framework for building production ready LLM applications in Python. Design modular pipelines and agent workflows with explicit control over retrieval, routing, memory, and generation. Build scalable RAG systems, multimodal applications, semantic search, question answering, and autonomous agents, all in a transparent architecture that lets you experiment, customize deeply, and deploy with confidence. Table of Contents Installation Documentation Features Haystack Enterprise: Support &…
read the full haystack overview →
About openchoreo
A complete, open source developer platform for Kubernetes OpenChoreo is a developer platform for Kubernetes that lets developers and AI agents build, deploy, and operate apps, resources, and agentic workloads. It provides development and platform abstractions, a Backstage powered developer portal, CI/CD, GitOps, and observability. Why OpenChoreo? Kubernetes gives you powerful primitives like Namespaces, Deployments, CronJobs, Services, and NetworkPolicies, but they're too low level for most developers. Platform engineers end up building the actual platform from scratch: defining higher level abstractions, wiring…
read the full openchoreo overview →
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Frequently asked questions
Is haystack or openchoreo more popular?
haystack has 26,924 GitHub stars and openchoreo has 1,759. 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 (26,924 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.