head to head · open source
ECC vs composio
ECC has 265,561 GitHub stars, 39,691 forks, 217 open issues and last shipped yesterday. composio has 30,291 stars, 4,816 forks, 88 open issues and last shipped today. ECC leads on adoption by 777% (265,561 vs 30,291 stars). ECC is written in JavaScript under MIT; composio is written in TypeScript under MIT. ECC has attracted 15% as many forks as stars, composio 16%. composio was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (ai-agents, developer-tools, llm), so they are genuine substitutes rather than adjacent tools.
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
| ECC | composio | |
|---|---|---|
| GitHub stars | ★ 266K | ★ 30K |
| License | MIT | MIT |
| Written in | JavaScript | TypeScript |
| Last push | 2026-09-22 | 2026-09-23 |
| Forks | ⑂ 40K | ⑂ 4.8K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ECC if
- You weight community size — 266K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick composio if
- You want the composio feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and composio fits your workflow better
About ECC
ECC is an MIT licensed open source agent harness performance optimization system that gives AI coding agents a coordinated engineering workflow — plan, test, implement, review, verify, remember, improve — for developers working in Claude Code, Codex, OpenCode, Cursor, and other harnesses.
About composio
Composio is an MIT licensed agent toolkit platform, distributed as TypeScript and Python SDKs, that gives AI agents more than 1,000 pre authenticated toolkits, per user sessions, authentication, triggers, and a sandbox for turning intent into action across real applications.
read the full composio overview →
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Frequently asked questions
Is ECC or composio more popular?
ECC has 265,561 GitHub stars and composio has 30,291. ECC has the larger community by that measure.
Are ECC and composio free?
Both are open source. ECC is licensed under MIT and composio under MIT. Neither carries a licence fee.
What is the difference between ECC and composio?
ECC is written in JavaScript and composio 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, ECC or composio?
Choose ECC if you want the larger community (265,561 stars) or its MIT licence terms. Choose composio if its feature set, stack or MIT licence fits better. Both are self-hostable.