head to head · open source
ECC vs KeystoneJS
ECC has 263,046 GitHub stars, 39,368 forks, 204 open issues and last shipped today. KeystoneJS has 9,976 stars, 1,265 forks, 138 open issues and last shipped 6 days ago. ECC leads on adoption by 2,537% (263,046 vs 9,976 stars). ECC is written in JavaScript under MIT; KeystoneJS is written in TypeScript under MIT. ECC has attracted 15% as many forks as stars, KeystoneJS 13%. ECC 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
| ECC | KeystoneJS | |
|---|---|---|
| GitHub stars | ★ 263K | ★ 10.0K |
| License | MIT | MIT |
| Written in | JavaScript | TypeScript |
| Last push | 2026-09-20 | 2026-09-14 |
| Forks | ⑂ 39K | ⑂ 1.3K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ECC if
- You weight community size — 263K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick KeystoneJS if
- You want the KeystoneJS feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and KeystoneJS 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 KeystoneJS
KeystoneJS is an open source Node.js CMS and application framework written in TypeScript and licensed under the MIT License. It lives in the Node.js, GraphQL, and React ecosystem, and its GitHub description calls it a headless CMS for Node.js. The project addresses the need to build a custom back end without writing all of the common content management plumbing by hand.
read the full KeystoneJS overview →
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Frequently asked questions
Is ECC or KeystoneJS more popular?
ECC has 263,046 GitHub stars and KeystoneJS has 9,976. ECC has the larger community by that measure.
Are ECC and KeystoneJS free?
Both are open source. ECC is licensed under MIT and KeystoneJS under MIT. Neither carries a licence fee.
What is the difference between ECC and KeystoneJS?
ECC is written in JavaScript and KeystoneJS 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 KeystoneJS?
Choose ECC if you want the larger community (263,046 stars) or its MIT licence terms. Choose KeystoneJS if its feature set, stack or MIT licence fits better. Both are self-hostable.