head to head · open source
ECC vs buildwithclaude
ECC has 263,932 GitHub stars, 39,482 forks, 210 open issues and last shipped 2 days ago. buildwithclaude has 3,503 stars, 519 forks, 19 open issues and last shipped 2 days ago. ECC leads on adoption by 7,434% (263,932 vs 3,503 stars). ECC is written in JavaScript under MIT; buildwithclaude is written in Python under MIT. ECC has attracted 15% as many forks as stars, buildwithclaude 15%. ECC was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (claude, claude-code, mcp), 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 | buildwithclaude | |
|---|---|---|
| GitHub stars | ★ 264K | ★ 3.5K |
| License | MIT | MIT |
| Written in | JavaScript | Python |
| Last push | 2026-09-20 | 2026-09-20 |
| Forks | ⑂ 39K | ⑂ 519 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ECC if
- You weight community size — 264K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick buildwithclaude if
- You want the buildwithclaude feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and buildwithclaude 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 buildwithclaude
Build with Claude is an open source plugin marketplace and discovery platform that gathers Claude Skills, Agents, Commands, Hooks, Plugins, and Marketplace collections into a single searchable hub for people extending Claude Code, Claude Desktop, the Agent SDK, and OpenClaw.
read the full buildwithclaude overview →
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Frequently asked questions
Is ECC or buildwithclaude more popular?
ECC has 263,932 GitHub stars and buildwithclaude has 3,503. ECC has the larger community by that measure.
Are ECC and buildwithclaude free?
Both are open source. ECC is licensed under MIT and buildwithclaude under MIT. Neither carries a licence fee.
What is the difference between ECC and buildwithclaude?
ECC is written in JavaScript and buildwithclaude in Python. 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 buildwithclaude?
Choose ECC if you want the larger community (263,932 stars) or its MIT licence terms. Choose buildwithclaude if its feature set, stack or MIT licence fits better. Both are self-hostable.