head to head · open source
ponytail vs openscience
ponytail has 141,465 GitHub stars, 7,581 forks, 270 open issues and last shipped 5 days ago. openscience has 3,597 stars, 478 forks, 21 open issues and last shipped yesterday. ponytail leads on adoption by 3,833% (141,465 vs 3,597 stars). ponytail is written in JavaScript under MIT; openscience is written in TypeScript under Apache-2.0. ponytail has attracted 5% as many forks as stars, openscience 13%. openscience was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (llm), 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
| ponytail | openscience | |
|---|---|---|
| GitHub stars | ★ 141K | ★ 3.6K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | TypeScript |
| Last push | 2026-09-14 | 2026-09-18 |
| Forks | ⑂ 7.6K | ⑂ 478 |
| 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 openscience if
- You want the openscience feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and openscience 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 openscience
OpenScience is an Apache 2.0, TypeScript research agent and workbench that lets a researcher describe a goal in plain language and then reads the literature, writes and runs code, runs experiments, and writes up findings with every step on the record.
read the full openscience overview →
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Frequently asked questions
Is ponytail or openscience more popular?
ponytail has 141,465 GitHub stars and openscience has 3,597. ponytail has the larger community by that measure.
Are ponytail and openscience free?
Both are open source. ponytail is licensed under MIT and openscience under Apache-2.0. Neither carries a licence fee.
What is the difference between ponytail and openscience?
ponytail is written in JavaScript and openscience in TypeScript. 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 openscience?
Choose ponytail if you want the larger community (141,465 stars) or its MIT licence terms. Choose openscience if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.