head to head · open source
haystack vs cli-agent-orchestrator
haystack has 26,924 GitHub stars, 3,388 forks, 143 open issues and last shipped yesterday. cli-agent-orchestrator has 1,510 stars, 313 forks, 151 open issues and last shipped yesterday. haystack leads on adoption by 1,683% (26,924 vs 1,510 stars). haystack is written in Python under Apache-2.0; cli-agent-orchestrator is written in Python under Apache-2.0. haystack has attracted 13% as many forks as stars, cli-agent-orchestrator 21%. cli-agent-orchestrator 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 | cli-agent-orchestrator | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 1.5K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-11-04 | 2026-11-04 |
| Forks | ⑂ 3.4K | ⑂ 313 |
| 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 cli-agent-orchestrator if
- You want the cli-agent-orchestrator 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 cli-agent-orchestrator 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 cli-agent-orchestrator
CLI Agent Orchestrator (CAO) English 简体中文 CLI Agent Orchestrator (CAO) coordinates multiple AI coding CLIs so a supervisor can delegate work to specialist agents in parallel or sequence. 📚 Documentation — guides, reference, and two interactive courses. What CAO does CAO runs a local cao server , starts provider CLIs in isolated terminal sessions, and gives a supervisor tools for coordinating workers. The agents remain full CLI processes with their native authentication and capabilities. See CODEBASE.md for the runtime architecture and package layout. Prerequisites Install: Python 3.10 or later tmux 3.3 or later…
read the full cli-agent-orchestrator overview →
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Frequently asked questions
Is haystack or cli-agent-orchestrator more popular?
haystack has 26,924 GitHub stars and cli-agent-orchestrator has 1,510. haystack has the larger community by that measure.
Are haystack and cli-agent-orchestrator free?
Both are open source. haystack is licensed under Apache-2.0 and cli-agent-orchestrator under Apache-2.0. Neither carries a licence fee.
What is the difference between haystack and cli-agent-orchestrator?
haystack is written in Python and cli-agent-orchestrator 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 cli-agent-orchestrator?
Choose haystack if you want the larger community (26,924 stars) or its Apache-2.0 licence terms. Choose cli-agent-orchestrator if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.