head to head · open source
ponytail vs browser-harness
ponytail has 141,230 GitHub stars, 7,572 forks, 270 open issues and last shipped 4 days ago. browser-harness has 17,633 stars, 1,729 forks, 353 open issues and last shipped 6 days ago. ponytail leads on adoption by 701% (141,230 vs 17,633 stars). ponytail is written in JavaScript under MIT; browser-harness is written in Python under MIT. ponytail has attracted 5% as many forks as stars, browser-harness 10%. ponytail 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.
← all 8884 open source comparisons
Side by side
| ponytail | browser-harness | |
|---|---|---|
| GitHub stars | ★ 141K | ★ 18K |
| License | MIT | MIT |
| Written in | JavaScript | Python |
| Last push | 2026-09-14 | 2026-09-12 |
| Forks | ⑂ 7.6K | ⑂ 1.7K |
| 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 browser-harness if
- You want the browser-harness feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and browser-harness 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 browser-harness
Browser Harness is an open source, MIT licensed Python harness that connects an LLM directly to a real browser through one editable CDP websocket, built for developers and agent builders who want a coding agent to carry out browser work end to end.
read the full browser-harness overview →
More in AI & Machine Learning
Related comparisons
More AI Development Platforms projects
Compare either of these against the rest of the AI Development Platforms field.
Frequently asked questions
Is ponytail or browser-harness more popular?
ponytail has 141,230 GitHub stars and browser-harness has 17,633. ponytail has the larger community by that measure.
Are ponytail and browser-harness free?
Both are open source. ponytail is licensed under MIT and browser-harness under MIT. Neither carries a licence fee.
What is the difference between ponytail and browser-harness?
ponytail is written in JavaScript and browser-harness 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 browser-harness?
Choose ponytail if you want the larger community (141,230 stars) or its MIT licence terms. Choose browser-harness if its feature set, stack or MIT licence fits better. Both are self-hostable.