head to head · open source
ECC vs devenv
ECC has 276,610 GitHub stars, 41,250 forks, 167 open issues and last shipped today. devenv has 7,731 stars, 577 forks, 388 open issues and last shipped 2 days ago. ECC leads on adoption by 3,478% (276,610 vs 7,731 stars). ECC is written in JavaScript under MIT; devenv is written in Rust under Apache-2.0. ECC has attracted 15% as many forks as stars, devenv 7%. 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 | devenv | |
|---|---|---|
| GitHub stars | ★ 277K | ★ 7.7K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Rust |
| Last push | 2026-10-11 | 2026-10-09 |
| Forks | ⑂ 41K | ⑂ 577 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ECC if
- You weight community size — 277K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick devenv if
- You want the devenv feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and devenv 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 devenv
devenv is a fast, declarative, reproducible, and composable way to define developer environments on Nix, aimed at developers and teams who want toolchains, services, and processes declared as code rather than handed down as setup instructions.
read the full devenv overview →
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Frequently asked questions
Is ECC or devenv more popular?
ECC has 276,610 GitHub stars and devenv has 7,731. ECC has the larger community by that measure.
Are ECC and devenv free?
Both are open source. ECC is licensed under MIT and devenv under Apache-2.0. Neither carries a licence fee.
What is the difference between ECC and devenv?
ECC is written in JavaScript and devenv in Rust. 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 devenv?
Choose ECC if you want the larger community (276,610 stars) or its MIT licence terms. Choose devenv if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.