head to head · open source
ponytail vs bun
ponytail has 142,629 GitHub stars, 7,653 forks, 270 open issues and last shipped 6 days ago. bun has 4,974 stars, 306 forks, 38 open issues and last shipped 1 months ago. ponytail leads on adoption by 2,767% (142,629 vs 4,974 stars). ponytail is written in JavaScript under MIT; bun is written in Go under BSD-2-Clause. ponytail has attracted 5% as many forks as stars, bun 6%. ponytail 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.
← all 20902 open source comparisons
Side by side
| ponytail | bun | |
|---|---|---|
| GitHub stars | ★ 143K | ★ 5.0K |
| License | MIT | BSD-2-Clause |
| Written in | JavaScript | Go |
| Last push | 2026-09-14 | 2026-08-21 |
| Forks | ⑂ 7.7K | ⑂ 306 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ponytail if
- You weight community size — 143K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick bun if
- You want the bun feature set and don't need the biggest community
- You prefer the BSD-2-Clause license terms
- Your stack matches Go
- You evaluated both and bun 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 bun
Bun is a lightweight, SQL first object relational mapper for Go that gives backend engineers type safe access to PostgreSQL, MySQL/MariaDB, MSSQL, SQLite, and Oracle from one database agnostic codebase.
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 bun more popular?
ponytail has 142,629 GitHub stars and bun has 4,974. ponytail has the larger community by that measure.
Are ponytail and bun free?
Both are open source. ponytail is licensed under MIT and bun under BSD-2-Clause. Neither carries a licence fee.
What is the difference between ponytail and bun?
ponytail is written in JavaScript and bun in Go. 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 bun?
Choose ponytail if you want the larger community (142,629 stars) or its MIT licence terms. Choose bun if its feature set, stack or BSD-2-Clause licence fits better. Both are self-hostable.