head to head · open source
ECC vs gitdiagram
ECC has 270,129 GitHub stars, 40,365 forks, 206 open issues and last shipped yesterday. gitdiagram has 17,596 stars, 1,346 forks, 43 open issues and last shipped yesterday. ECC leads on adoption by 1,435% (270,129 vs 17,596 stars). ECC is written in JavaScript under MIT; gitdiagram is written in TypeScript under MIT. ECC has attracted 15% as many forks as stars, gitdiagram 8%. ECC was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (developer-tools, llm), 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 | gitdiagram | |
|---|---|---|
| GitHub stars | ★ 270K | ★ 18K |
| License | MIT | MIT |
| Written in | JavaScript | TypeScript |
| Last push | 2026-09-30 | 2026-09-30 |
| Forks | ⑂ 40K | ⑂ 1.3K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ECC if
- You weight community size — 270K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick gitdiagram if
- You want the gitdiagram feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and gitdiagram 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 gitdiagram
GitDiagram is an open source, MIT licensed TypeScript tool that turns any public or private GitHub repository into an interactive architecture diagram — and now into a one minute narrated explainer video — for developers, reviewers and AI agents who need to understand a codebase quickly.
read the full gitdiagram overview →
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Frequently asked questions
Is ECC or gitdiagram more popular?
ECC has 270,129 GitHub stars and gitdiagram has 17,596. ECC has the larger community by that measure.
Are ECC and gitdiagram free?
Both are open source. ECC is licensed under MIT and gitdiagram under MIT. Neither carries a licence fee.
What is the difference between ECC and gitdiagram?
ECC is written in JavaScript and gitdiagram 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 gitdiagram?
Choose ECC if you want the larger community (270,129 stars) or its MIT licence terms. Choose gitdiagram if its feature set, stack or MIT licence fits better. Both are self-hostable.