head to head · open source
ECC vs Convex
ECC has 263,046 GitHub stars, 39,368 forks, 204 open issues and last shipped today. Convex has 12,583 stars, 814 forks, 220 open issues and last shipped yesterday. ECC leads on adoption by 1,990% (263,046 vs 12,583 stars). ECC is written in JavaScript under MIT; Convex is written in TypeScript under a custom or non-standard licence. ECC has attracted 15% as many forks as stars, Convex 6%. 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 | Convex | |
|---|---|---|
| GitHub stars | ★ 263K | ★ 13K |
| License | MIT | Custom / other |
| Written in | JavaScript | TypeScript |
| Last push | 2026-09-20 | 2026-09-19 |
| Forks | ⑂ 39K | ⑂ 814 |
| 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 Convex if
- You want the Convex feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches TypeScript
- You evaluated both and Convex 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 Convex
Convex is an open source reactive database for web application developers, with a Rust backend and TypeScript packages, in the backend, database, and TypeScript ecosystem. It combines a database, server functions, and client libraries so developers can fetch data and perform business logic in pure TypeScript while keeping strong consistency and live updating behavior.
read the full Convex overview →
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Frequently asked questions
Is ECC or Convex more popular?
ECC has 263,046 GitHub stars and Convex has 12,583. ECC has the larger community by that measure.
Are ECC and Convex free?
Both are open source. ECC is licensed under MIT, and Convex has no licence declared in this registry. Both are free to self-host.
What is the difference between ECC and Convex?
ECC is written in JavaScript and Convex 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 Convex?
Choose ECC if you want the larger community (263,046 stars) or its MIT licence terms. Choose Convex if its feature set, stack or Custom / other licence fits better. Both are self-hostable.