head to head · open source
rtk vs Aider
rtk has 85,327 GitHub stars, 5,462 forks, 1,642 open issues and last shipped yesterday. Aider has 49,910 stars, 5,128 forks, 1,860 open issues and last shipped 6 months ago. rtk leads on adoption by 71% (85,327 vs 49,910 stars). rtk is written in Rust under Apache-2.0; Aider is written in Python under Apache-2.0. rtk has attracted 6% as many forks as stars, Aider 10%. rtk was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (anthropic, cli), 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
| rtk | Aider | |
|---|---|---|
| GitHub stars | ★ 85K | ★ 50K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Rust | Python |
| Last push | 2026-11-02 | 2026-05-22 |
| Forks | ⑂ 5.5K | ⑂ 5.1K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick rtk if
- You weight community size — 85K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Rust
- You value the larger contributor base for long-term maintenance
pick Aider if
- You want the Aider 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 Aider fits your workflow better
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…
About Aider
AI Pair Programming in Your Terminal Aider lets you pair program with LLMs to start a new project or build on your existing codebase. Features Cloud and local LLMs Aider works best with Claude 3.7 Sonnet, DeepSeek R1 & Chat V3, OpenAI o1, o3 mini & GPT 4o, but can connect to almost any LLM, including local models. Maps your codebase Aider makes a map of your entire codebase, which helps it work well in larger projects. 100+ code languages Aider works with most popular programming languages: python, javascript, rust, ruby, go, cpp, php, html, css, and dozens more. Git integration Aider automatically commits…
read the full Aider overview →
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Frequently asked questions
Is rtk or Aider more popular?
rtk has 85,327 GitHub stars and Aider has 49,910. rtk has the larger community by that measure.
Are rtk and Aider free?
Both are open source. rtk is licensed under Apache-2.0 and Aider under Apache-2.0. Neither carries a licence fee.
What is the difference between rtk and Aider?
rtk is written in Rust and Aider 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, rtk or Aider?
Choose rtk if you want the larger community (85,327 stars) or its Apache-2.0 licence terms. Choose Aider if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.