head to head · open source
T3 Code vs SWE-agent
T3 Code has 22,945 GitHub stars, 5,817 forks, 1,628 open issues and last shipped yesterday. SWE-agent has 20,344 stars, 2,224 forks, 102 open issues and last shipped 4 days ago. T3 Code leads on adoption by 13% (22,945 vs 20,344 stars). T3 Code is written in TypeScript under MIT; SWE-agent is written in Python under MIT. T3 Code has attracted 25% as many forks as stars, SWE-agent 11%. 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
| T3 Code | SWE-agent | |
|---|---|---|
| GitHub stars | ★ 23K | ★ 20K |
| License | MIT | MIT |
| Written in | TypeScript | Python |
| Last push | 2026-09-17 | 2026-09-14 |
| Forks | ⑂ 5.8K | ⑂ 2.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick T3 Code if
- You weight community size — 23K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick SWE-agent if
- You want the SWE-agent feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and SWE-agent fits your workflow better
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 →
About SWE-agent
SWE agent is a Python, MIT licensed open source project in the AI assisted coding and agent ecosystem. It is an agent based model for developer tools that takes a GitHub issue and tries to automatically fix it using a chosen language model. The project is associated with NeurIPS 2024 and is maintained by researchers from Princeton University and Stanford University.
read the full SWE-agent overview →
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Frequently asked questions
Is T3 Code or SWE-agent more popular?
T3 Code has 22,945 GitHub stars and SWE-agent has 20,344. T3 Code has the larger community by that measure.
Are T3 Code and SWE-agent free?
Both are open source. T3 Code is licensed under MIT and SWE-agent under MIT. Neither carries a licence fee.
What is the difference between T3 Code and SWE-agent?
T3 Code is written in TypeScript and SWE-agent 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, T3 Code or SWE-agent?
Choose T3 Code if you want the larger community (22,945 stars) or its MIT licence terms. Choose SWE-agent if its feature set, stack or MIT licence fits better. Both are self-hostable.