head to head · open source
ECC vs react-cosmos
ECC has 296,647 GitHub stars, 43,867 forks, 225 open issues and last shipped 2 days ago. react-cosmos has 8,694 stars, 383 forks, 5 open issues and last shipped 5 days ago. ECC leads on adoption by 3,312% (296,647 vs 8,694 stars). ECC is written in JavaScript under MIT; react-cosmos is written in TypeScript under MIT. ECC has attracted 15% as many forks as stars, react-cosmos 4%. 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.
← all 20902 open source comparisons
Side by side
| ECC | react-cosmos | |
|---|---|---|
| GitHub stars | ★ 297K | ★ 8.7K |
| License | MIT | MIT |
| Written in | JavaScript | TypeScript |
| Last push | 2026-11-02 | 2026-10-30 |
| Forks | ⑂ 44K | ⑂ 383 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ECC if
- You weight community size — 297K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick react-cosmos if
- You want the react-cosmos feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and react-cosmos fits your workflow better
About ECC
Language: English العربية Português (Brasil) 简体中文 繁體中文 日本語 한국어 Türkçe Русский Tiếng Việt ไทย Deutsch Español Українська Polski বাংলা [!WARNING] Official sources only. Install ECC only from verified channels: the GitHub repository github.com/affaan m/ECC, the npm packages ecc universal and ecc agentshield , the GitHub App, the plugin slug ecc@ecc , and the project website ecc.tools. Third party re uploads and unofficial mirrors are not maintained or reviewed by the project and may contain malware. Install with Claude Code Use the guided setup or native plugin commands. Both install the same ecc@ecc plugin. Choose…
About react-cosmos
React Cosmos Getting Started Choose one of the Getting Started guides to dive into React Cosmos. Check out the Next.js integration to get started with React Server Components. Visit reactcosmos.org/docs to view the full documentation. Community To chat with other community members you can join the React Cosmos Discord. You can also ask questions, voice ideas, and share your projects on GitHub Discussions. Our Code of Conduct applies to all React Cosmos community channels. Contributing Please see our CONTRIBUTING.md. Become a Sponsor to support the ongoing development of React Cosmos. Live Demo Visit…
read the full react-cosmos overview →
More in Developer Tools
Related comparisons
More Frameworks & Platforms projects
Compare either of these against the rest of the Frameworks & Platforms field.
Frequently asked questions
Is ECC or react-cosmos more popular?
ECC has 296,647 GitHub stars and react-cosmos has 8,694. ECC has the larger community by that measure.
Are ECC and react-cosmos free?
Both are open source. ECC is licensed under MIT and react-cosmos under MIT. Neither carries a licence fee.
What is the difference between ECC and react-cosmos?
ECC is written in JavaScript and react-cosmos 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 react-cosmos?
Choose ECC if you want the larger community (296,647 stars) or its MIT licence terms. Choose react-cosmos if its feature set, stack or MIT licence fits better. Both are self-hostable.