head to head · open source
ECC vs opencodex
ECC has 269,116 GitHub stars, 40,215 forks, 236 open issues and last shipped yesterday. opencodex has 16,605 stars, 1,246 forks, 101 open issues and last shipped yesterday. ECC leads on adoption by 1,521% (269,116 vs 16,605 stars). ECC is written in JavaScript under MIT; opencodex is written in TypeScript under MIT. ECC has attracted 15% as many forks as stars, opencodex 8%. opencodex was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 4 topic tags (anthropic, claude, claude-code, developer-tools), 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 | opencodex | |
|---|---|---|
| GitHub stars | ★ 269K | ★ 17K |
| License | MIT | MIT |
| Written in | JavaScript | TypeScript |
| Last push | 2026-09-28 | 2026-09-28 |
| Forks | ⑂ 40K | ⑂ 1.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ECC if
- You weight community size — 269K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick opencodex if
- You want the opencodex feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and opencodex 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 opencodex
opencodex is an MIT licensed, TypeScript based universal provider proxy, installed as the npm package @bitkyc08/opencodex , that lets OpenAI Codex, Claude Code, Claude Desktop, and Grok Build run against whichever LLM a developer points them at.
read the full opencodex overview →
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Frequently asked questions
Is ECC or opencodex more popular?
ECC has 269,116 GitHub stars and opencodex has 16,605. ECC has the larger community by that measure.
Are ECC and opencodex free?
Both are open source. ECC is licensed under MIT and opencodex under MIT. Neither carries a licence fee.
What is the difference between ECC and opencodex?
ECC is written in JavaScript and opencodex 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 opencodex?
Choose ECC if you want the larger community (269,116 stars) or its MIT licence terms. Choose opencodex if its feature set, stack or MIT licence fits better. Both are self-hostable.