head to head · open source
ECC vs skybridge
ECC has 271,121 GitHub stars, 40,511 forks, 336 open issues and last shipped yesterday. skybridge has 2,112 stars, 138 forks, 58 open issues and last shipped yesterday. ECC leads on adoption by 12,737% (271,121 vs 2,112 stars). ECC is written in JavaScript under MIT; skybridge is written in TypeScript under MIT. ECC has attracted 15% as many forks as stars, skybridge 7%. skybridge was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (claude, claude-code, mcp), 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 | skybridge | |
|---|---|---|
| GitHub stars | ★ 271K | ★ 2.1K |
| License | MIT | MIT |
| Written in | JavaScript | TypeScript |
| Last push | 2026-10-02 | 2026-10-02 |
| Forks | ⑂ 41K | ⑂ 138 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ECC if
- You weight community size — 271K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick skybridge if
- You want the skybridge feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and skybridge 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 skybridge
Skybridge is a full stack TypeScript framework for developers and coding agents building type safe, React powered MCP Apps and ChatGPT Apps that run across UI enabled MCP clients.
read the full skybridge overview →
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Frequently asked questions
Is ECC or skybridge more popular?
ECC has 271,121 GitHub stars and skybridge has 2,112. ECC has the larger community by that measure.
Are ECC and skybridge free?
Both are open source. ECC is licensed under MIT and skybridge under MIT. Neither carries a licence fee.
What is the difference between ECC and skybridge?
ECC is written in JavaScript and skybridge 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 skybridge?
Choose ECC if you want the larger community (271,121 stars) or its MIT licence terms. Choose skybridge if its feature set, stack or MIT licence fits better. Both are self-hostable.