head to head · open source
pi vs Aider
pi has 119,586 GitHub stars, 15,353 forks, 202 open issues and last shipped yesterday. Aider has 49,910 stars, 5,128 forks, 1,860 open issues and last shipped 6 months ago. pi leads on adoption by 140% (119,586 vs 49,910 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.
← all 20902 open source comparisons
Side by side
| pi | Aider | |
|---|---|---|
| GitHub stars | ★ 120K | ★ 50K |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | Python |
| Last push | 2026-11-02 | 2026-05-22 |
| Forks | ⑂ 15K | ⑂ 5.1K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick pi if
- You weight community size — 120K 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
New issues and PRs from new contributors are auto closed by default. Maintainers review auto closed issues daily. See CONTRIBUTING.md. Pi Agent Harness This is the home of the Pi agent harness project including our self extensible coding agent. @earendil works/pi coding agent : Interactive coding agent CLI @earendil works/pi agent core : Agent runtime with tool calling and state management @earendil works/pi ai : Unified multi provider LLM API (OpenAI, Anthropic, Google, …) To learn more about Pi: Visit pi.dev, the project website with demos Read the documentation, but you can also ask the agent to explain…
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 →
More in Developer Tools
Related comparisons
More AI Assisted Coding projects
Compare either of these against the rest of the AI Assisted Coding field.
Frequently asked questions
Is pi or Aider more popular?
pi has 119,586 GitHub stars and Aider has 49,910. 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 (119,586 stars) or its MIT licence terms. Choose Aider if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.