head to head · open source
pi vs Aider
pi has 106,586 GitHub stars, 13,437 forks, 202 open issues and last shipped yesterday. Aider has 49,021 stars, 4,967 forks, 1,860 open issues and last shipped 4 months ago. pi leads on adoption by 117% (106,586 vs 49,021 stars). pi is written in TypeScript under MIT; Aider is written in Python under Apache-2.0. pi has attracted 13% as many forks as stars, Aider 10%. pi 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.
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Side by side
| pi | Aider | |
|---|---|---|
| GitHub stars | ★ 107K | ★ 49K |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | Python |
| Last push | 2026-09-17 | 2026-05-22 |
| Forks | ⑂ 13K | ⑂ 5.0K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick pi if
- You weight community size — 107K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- 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 pi
Pi is a modular agent toolkit written in TypeScript for building and running terminal based AI coding agents. It lives in the developer tooling ecosystem and provides composable packages for LLM integration, agent orchestration, and terminal UI rendering. The project centers on @earendil works/pi coding agent , an interactive CLI agent, supported by core runtime, AI abstraction, and TUI libraries.
About Aider
Aider is an open source AI pair programming tool that runs in the terminal. It connects to large language models—cloud based or local—to assist with writing, editing, and debugging code directly within a developer’s existing workflow. Built in Python and licensed under Apache 2.0, it integrates with popular LLMs including OpenAI, Anthropic, Google Gemini, and open source models like Llama.
read the full Aider overview →
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Frequently asked questions
Is pi or Aider more popular?
pi has 106,586 GitHub stars and Aider has 49,021. pi has the larger community by that measure.
Are pi and Aider free?
Both are open source. pi is licensed under MIT and Aider under Apache-2.0. Neither carries a licence fee.
What is the difference between pi and Aider?
pi is written in TypeScript 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, pi or Aider?
Choose pi if you want the larger community (106,586 stars) or its MIT licence terms. Choose Aider if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.