head to head · open source
rancher vs harmonist
rancher has 26,035 GitHub stars, 3,227 forks, 3,371 open issues and last shipped yesterday. harmonist has 2,244 stars, 209 forks, 1 open issues and last shipped 5 months ago. rancher leads on adoption by 1,060% (26,035 vs 2,244 stars). rancher is written in Go under Apache-2.0; harmonist is written in Python under MIT. rancher has attracted 12% as many forks as stars, harmonist 9%. rancher was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (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
| rancher | harmonist | |
|---|---|---|
| GitHub stars | ★ 26K | ★ 2.2K |
| License | Apache-2.0 | MIT |
| Written in | Go | Python |
| Last push | 2026-11-04 | 2026-06-09 |
| Forks | ⑂ 3.2K | ⑂ 209 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick rancher if
- You weight community size — 26K 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 rancher
Rancher Rancher is an open source container management platform built for organizations that deploy containers in production. Rancher makes it easy to run Kubernetes everywhere, meet IT requirements, and empower DevOps teams. Stable Release v2.15.1 rancher/rancher:v2.15.1 / rancher/rancher:stable Read the full release notes. To get automated notifications of our latest release, you can watch the announcements category in our forums, or subscribe to the RSS feed Quick Start sudo docker run d restart=unless stopped p 80:80 p 443:443 privileged rancher/rancher Open your browser to Installation See…
read the full rancher overview →
About harmonist
If you are an AI agent asked to install or integrate this pack: read integration prompt.md and execute its steps. Do not apply AGENTS.template.md as a live rule inside the pack folder — it is the template that becomes the user project's AGENTS.md during integration. Harmonist Portable AI agent orchestration with mechanical protocol enforcement A drop in multi agent framework for Cursor, Claude Code, Copilot, Windsurf, Aider, and other AI coding assistants. Built and maintained by GammaLab · @GammaLabTechnologies Most AI coding frameworks trust the language model to follow the rules. Harmonist refuses to let it…
read the full harmonist overview →
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Frequently asked questions
Is rancher or harmonist more popular?
rancher has 26,035 GitHub stars and harmonist has 2,244. rancher has the larger community by that measure.
Are rancher and harmonist free?
Both are open source. rancher is licensed under Apache-2.0 and harmonist under MIT. Neither carries a licence fee.
What is the difference between rancher and harmonist?
rancher 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, rancher or harmonist?
Choose rancher if you want the larger community (26,035 stars) or its Apache-2.0 licence terms. Choose harmonist if its feature set, stack or MIT licence fits better. Both are self-hostable.