head to head · open source
ponytail vs OpenSandbox
ponytail has 141,465 GitHub stars, 7,581 forks, 270 open issues and last shipped 4 days ago. OpenSandbox has 15,381 stars, 1,407 forks, 132 open issues and last shipped today. ponytail leads on adoption by 820% (141,465 vs 15,381 stars). ponytail is written in JavaScript under MIT; OpenSandbox is written in Python under Apache-2.0. ponytail has attracted 5% as many forks as stars, OpenSandbox 9%. OpenSandbox was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| ponytail | OpenSandbox | |
|---|---|---|
| GitHub stars | ★ 141K | ★ 15K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Python |
| Last push | 2026-09-14 | 2026-09-18 |
| Forks | ⑂ 7.6K | ⑂ 1.4K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ponytail if
- You weight community size — 141K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick OpenSandbox if
- You want the OpenSandbox 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 OpenSandbox fits your workflow better
About ponytail
Ponytail is an open source agent skill for JavaScript and LLM based coding tools that makes an AI agent write the minimum working code for a task, and it is built for developers and teams running agents such as Claude Code, Codex, or Cursor against real repositories.
read the full ponytail overview →
About OpenSandbox
OpenSandbox is an Apache 2.0, Python based general purpose sandbox platform that gives AI agent developers a unified sandbox API with Docker and Kubernetes runtimes plus multi language SDKs, the osb CLI, and an MCP server.
read the full OpenSandbox overview →
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Frequently asked questions
Is ponytail or OpenSandbox more popular?
ponytail has 141,465 GitHub stars and OpenSandbox has 15,381. ponytail has the larger community by that measure.
Are ponytail and OpenSandbox free?
Both are open source. ponytail is licensed under MIT and OpenSandbox under Apache-2.0. Neither carries a licence fee.
What is the difference between ponytail and OpenSandbox?
ponytail is written in JavaScript and OpenSandbox 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, ponytail or OpenSandbox?
Choose ponytail if you want the larger community (141,465 stars) or its MIT licence terms. Choose OpenSandbox if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.