head to head · open source
ECC vs responsively-app
ECC has 267,866 GitHub stars, 40,036 forks, 239 open issues and last shipped 3 days ago. responsively-app has 25,200 stars, 1,403 forks, 324 open issues and last shipped 7 days ago. ECC leads on adoption by 963% (267,866 vs 25,200 stars). ECC is written in JavaScript under MIT; responsively-app is written in TypeScript under AGPL-3.0. ECC has attracted 15% as many forks as stars, responsively-app 6%. 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 | responsively-app | |
|---|---|---|
| GitHub stars | ★ 268K | ★ 25K |
| License | MIT | AGPL-3.0 |
| Written in | JavaScript | TypeScript |
| Last push | 2026-09-24 | 2026-09-20 |
| Forks | ⑂ 40K | ⑂ 1.4K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ECC if
- You weight community size — 268K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick responsively-app if
- You want the responsively-app feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and responsively-app 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 responsively-app
Responsively App is a free, open source modified web browser built on Electron that previews a page at several device sizes at once and mirrors interactions across them, aimed at web developers doing responsive front end work.
read the full responsively-app overview →
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Frequently asked questions
Is ECC or responsively-app more popular?
ECC has 267,866 GitHub stars and responsively-app has 25,200. ECC has the larger community by that measure.
Are ECC and responsively-app free?
Both are open source. ECC is licensed under MIT and responsively-app under AGPL-3.0. Neither carries a licence fee.
What is the difference between ECC and responsively-app?
ECC is written in JavaScript and responsively-app 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 responsively-app?
Choose ECC if you want the larger community (267,866 stars) or its MIT licence terms. Choose responsively-app if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.