head to head · open source
ECC vs DevToys
ECC has 264,832 GitHub stars, 39,574 forks, 208 open issues and last shipped yesterday. DevToys has 32,024 stars, 1,757 forks, 340 open issues and last shipped 7 months ago. ECC leads on adoption by 727% (264,832 vs 32,024 stars). ECC is written in JavaScript under MIT; DevToys is written in C# under MIT. ECC has attracted 15% as many forks as stars, DevToys 5%. 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 | DevToys | |
|---|---|---|
| GitHub stars | ★ 265K | ★ 32K |
| License | MIT | MIT |
| Written in | JavaScript | C# |
| Last push | 2026-09-21 | 2026-02-25 |
| Forks | ⑂ 40K | ⑂ 1.8K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ECC if
- You weight community size — 265K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick DevToys if
- You want the DevToys feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and DevToys 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 DevToys
DevToys is an open source, MIT licensed, cross platform desktop application written in C that bundles dozens of small, single purpose developer utilities — converters, encoders and decoders, formatters, generators, graphics tools, testers and text utilities — into one app, aimed at developers who need quick data conversions and inspections without pasting their data into random websites.
read the full DevToys overview →
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Frequently asked questions
Is ECC or DevToys more popular?
ECC has 264,832 GitHub stars and DevToys has 32,024. ECC has the larger community by that measure.
Are ECC and DevToys free?
Both are open source. ECC is licensed under MIT and DevToys under MIT. Neither carries a licence fee.
What is the difference between ECC and DevToys?
ECC is written in JavaScript and DevToys in C#. 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 DevToys?
Choose ECC if you want the larger community (264,832 stars) or its MIT licence terms. Choose DevToys if its feature set, stack or MIT licence fits better. Both are self-hostable.