head to head · open source
agent-orchestrator vs harmonist
agent-orchestrator has 12,195 GitHub stars, 1,685 forks, 711 open issues and last shipped today. harmonist has 2,257 stars, 206 forks, 1 open issues and last shipped 3 months ago. agent-orchestrator leads on adoption by 440% (12,195 vs 2,257 stars). agent-orchestrator is written in Go under Apache-2.0; harmonist is written in Python under MIT. agent-orchestrator has attracted 14% as many forks as stars, harmonist 9%. agent-orchestrator was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (claude-code, orchestration), 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
| agent-orchestrator | harmonist | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 2.3K |
| License | Apache-2.0 | MIT |
| Written in | Go | Python |
| Last push | 2026-09-20 | 2026-06-09 |
| Forks | ⑂ 1.7K | ⑂ 206 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick agent-orchestrator if
- You weight community size — 12K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick harmonist if
- You want the harmonist feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and harmonist fits your workflow better
About agent-orchestrator
Agent Orchestrator is an open source desktop workspace for running and supervising teams of coding agents, written in Go and released under the Apache 2.0 license. It lives in the agent orchestration ecosystem, alongside the coding harnesses it drives, and it is distributed as a local application rather than as a hosted service. The project describes itself as a place to plan, run, and supervise coding agents from one place, giving every coding task its own agent, workspace, and feedback loop.
read the full agent-orchestrator overview →
About harmonist
harmonist is an MIT licensed, dependency free Python framework that adds multi agent orchestration and mechanically enforced protocol to AI coding assistants such as Cursor, Claude Code, Copilot, Windsurf, and Aider, and it serves individual developers and teams who need agent workflows to obey engineering rules rather than merely be asked to follow them.
read the full harmonist overview →
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Frequently asked questions
Is agent-orchestrator or harmonist more popular?
agent-orchestrator has 12,195 GitHub stars and harmonist has 2,257. agent-orchestrator has the larger community by that measure.
Are agent-orchestrator and harmonist free?
Both are open source. agent-orchestrator is licensed under Apache-2.0 and harmonist under MIT. Neither carries a licence fee.
What is the difference between agent-orchestrator and harmonist?
agent-orchestrator is written in Go and harmonist 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, agent-orchestrator or harmonist?
Choose agent-orchestrator if you want the larger community (12,195 stars) or its Apache-2.0 licence terms. Choose harmonist if its feature set, stack or MIT licence fits better. Both are self-hostable.