head to head · open source
pi vs T3 Code
pi has 106,586 GitHub stars, 13,437 forks, 202 open issues and last shipped yesterday. T3 Code has 22,945 stars, 5,817 forks, 1,628 open issues and last shipped yesterday. pi leads on adoption by 365% (106,586 vs 22,945 stars). pi is written in TypeScript under MIT; T3 Code is written in TypeScript under MIT. pi has attracted 13% as many forks as stars, T3 Code 25%. 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
| pi | T3 Code | |
|---|---|---|
| GitHub stars | ★ 107K | ★ 23K |
| License | MIT | MIT |
| Written in | TypeScript | TypeScript |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 13K | ⑂ 5.8K |
| 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 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 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 T3 Code
T3 Code is an open source agent harness control surface for AI assisted coding. It lives in the developer tools ecosystem for local coding agents, and it gives users one interface for agents that are already installed and authenticated on their own computer. The project is written in TypeScript and is MIT licensed.
read the full T3 Code overview →
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Frequently asked questions
Is pi or T3 Code more popular?
pi has 106,586 GitHub stars and T3 Code has 22,945. pi has the larger community by that measure.
Are pi and T3 Code free?
Both are open source. pi is licensed under MIT and T3 Code under MIT. Neither carries a licence fee.
What is the difference between pi and T3 Code?
pi is written in TypeScript 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, pi or T3 Code?
Choose pi if you want the larger community (106,586 stars) or its MIT licence terms. Choose T3 Code if its feature set, stack or MIT licence fits better. Both are self-hostable.