head to head · open source
ECC vs rnx-kit
ECC has 273,125 GitHub stars, 40,766 forks, 345 open issues and last shipped today. rnx-kit has 1,737 stars, 119 forks, 9 open issues and last shipped today. ECC leads on adoption by 15,624% (273,125 vs 1,737 stars). ECC is written in JavaScript under MIT; rnx-kit is written in TypeScript under MIT. ECC has attracted 15% as many forks as stars, rnx-kit 7%. ECC was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (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 | rnx-kit | |
|---|---|---|
| GitHub stars | ★ 273K | ★ 1.7K |
| License | MIT | MIT |
| Written in | JavaScript | TypeScript |
| Last push | 2026-10-05 | 2026-10-05 |
| Forks | ⑂ 41K | ⑂ 119 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ECC if
- You weight community size — 273K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick rnx-kit if
- You want the rnx-kit feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and rnx-kit 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 rnx-kit
rnx kit is a collection of MIT licensed TypeScript tools built by Microsoft engineers for React Native developers who need to manage dependencies, bundle code, and build mobile apps consistently across large projects.
read the full rnx-kit overview →
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Frequently asked questions
Is ECC or rnx-kit more popular?
ECC has 273,125 GitHub stars and rnx-kit has 1,737. ECC has the larger community by that measure.
Are ECC and rnx-kit free?
Both are open source. ECC is licensed under MIT and rnx-kit under MIT. Neither carries a licence fee.
What is the difference between ECC and rnx-kit?
ECC is written in JavaScript and rnx-kit 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 rnx-kit?
Choose ECC if you want the larger community (273,125 stars) or its MIT licence terms. Choose rnx-kit if its feature set, stack or MIT licence fits better. Both are self-hostable.