head to head · open source
Aider vs T3 Code
Aider has 49,910 GitHub stars, 5,128 forks, 1,860 open issues and last shipped 6 months ago. T3 Code has 41,350 stars, 9,068 forks, 1,628 open issues and last shipped yesterday. Aider leads on adoption by 21% (49,910 vs 41,350 stars). Aider is written in Python under Apache-2.0; T3 Code is written in TypeScript under MIT. Aider has attracted 10% as many forks as stars, T3 Code 22%. T3 Code 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
| Aider | T3 Code | |
|---|---|---|
| GitHub stars | ★ 50K | ★ 41K |
| License | Apache-2.0 | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-05-22 | 2026-11-02 |
| Forks | ⑂ 5.1K | ⑂ 9.1K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Aider if
- You weight community size — 50K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick T3 Code if
- You want the T3 Code feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and T3 Code fits your workflow better
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 →
About T3 Code
T3 Code T3 Code is an "agent harness control surface". It enables control of the agents on your machine with a best in class mobile app (iOS, Android), web app and Electron based desktop app. Works with your subscriptions on Claude Code, Codex, Cursor, Grok Build, OpenCode, and Google Antigravity. If they're set up on your computer, T3 Code can control them. "Wait, what are you selling me?" Nothing. We built T3 Code because we wanted the best possible development experience with agents. We were inspired by existing solutions like the Codex desktop app, Conductor, Claude Desktop and Cursor Glass, but none met our…
read the full T3 Code overview →
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Frequently asked questions
Is Aider or T3 Code more popular?
Aider has 49,910 GitHub stars and T3 Code has 41,350. Aider has the larger community by that measure.
Are Aider and T3 Code free?
Both are open source. Aider is licensed under Apache-2.0 and T3 Code under MIT. Neither carries a licence fee.
What is the difference between Aider and T3 Code?
Aider is written in Python and T3 Code in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Aider or T3 Code?
Choose Aider if you want the larger community (49,910 stars) or its Apache-2.0 licence terms. Choose T3 Code if its feature set, stack or MIT licence fits better. Both are self-hostable.