head to head · open source
ponytail vs rtk
ponytail has 183,878 GitHub stars, 10,143 forks, 270 open issues and last shipped 6 days ago. rtk has 85,499 stars, 5,470 forks, 1,642 open issues and last shipped yesterday. ponytail leads on adoption by 115% (183,878 vs 85,499 stars). ponytail is written in JavaScript under MIT; rtk is written in Rust under Apache-2.0. ponytail has attracted 6% as many forks as stars, rtk 6%. rtk was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (claude-code, developer-tools, 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 | rtk | |
|---|---|---|
| GitHub stars | ★ 184K | ★ 85K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Rust |
| Last push | 2026-10-29 | 2026-11-03 |
| Forks | ⑂ 10K | ⑂ 5.5K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ponytail if
- You weight community size — 184K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick rtk if
- You want the rtk feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and rtk fits your workflow better
About ponytail
Ponytail He says nothing. He writes one line. It works. 54% less code (up to 94%) · 20% cheaper · 27% faster · 100% safe Measured on real Claude Code sessions editing a real open source repo (FastAPI + React), against the same agent with no skill. 54% is the mean across 12 feature tasks (Haiku 4.5, n=4); it reaches 94% where an agent over builds (a date picker) and is near zero where the code is already minimal. ponytail keeps every safety guard while a bare "write one liners" prompt drops one. (The earlier single shot benchmark reported 80 94% as a flat figure; against a fair agentic…
read the full ponytail overview →
About rtk
High performance CLI proxy that cuts up to 90% of the bash output your agent reads Website • Install • Troubleshooting • Architecture • Discord English • Francais • 中文 • 日本語 • 한국어 • Espanol • Português rtk filters and compresses command outputs before they reach your LLM context. Single Rust binary, 100+ supported commands, Full explanation: How RTK Savings Work Installation Homebrew (recommended) winget (Windows) Easiest way to install on Windows — one command, no PATH setup needed: Quick Install (Linux/macOS) Installs to /.local/bin . Add to PATH if needed…
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Frequently asked questions
Is ponytail or rtk more popular?
ponytail has 183,878 GitHub stars and rtk has 85,499. ponytail has the larger community by that measure.
Are ponytail and rtk free?
Both are open source. ponytail is licensed under MIT and rtk under Apache-2.0. Neither carries a licence fee.
What is the difference between ponytail and rtk?
ponytail is written in JavaScript and rtk in Rust. 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 rtk?
Choose ponytail if you want the larger community (183,878 stars) or its MIT licence terms. Choose rtk if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.