head to head · open source
opcode vs react-codemirror
opcode has 22,412 GitHub stars, 1,715 forks, 332 open issues and last shipped 26 days ago. react-codemirror has 2,258 stars, 162 forks, 172 open issues and last shipped 20 days ago. opcode leads on adoption by 893% (22,412 vs 2,258 stars). opcode is written in TypeScript under AGPL-3.0; react-codemirror is written in TypeScript under MIT. opcode has attracted 8% as many forks as stars, react-codemirror 7%. react-codemirror was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ide), 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
| opcode | react-codemirror | |
|---|---|---|
| GitHub stars | ★ 22K | ★ 2.3K |
| License | AGPL-3.0 | MIT |
| Written in | TypeScript | TypeScript |
| Last push | 2026-09-18 | 2026-09-24 |
| Forks | ⑂ 1.7K | ⑂ 162 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick opcode if
- You weight community size — 22K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick react-codemirror if
- You want the react-codemirror feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and react-codemirror fits your workflow better
About opcode
opcode is an open source desktop GUI application and toolkit for Claude Code that provides a visual command centre for projects, sessions, custom agents, Model Context Protocol servers, checkpoints, and API usage, aimed at developers who already work with Claude Code from the command line and want a graphical layer over it.
read the full opcode overview →
About react-codemirror
react codemirror is the npm package @uiw/react codemirror : a CodeMirror 6 editor component for React, written in TypeScript, intended for React developers who need a code editor embedded inside an application rather than a standalone editing tool.
read the full react-codemirror overview →
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Frequently asked questions
Is opcode or react-codemirror more popular?
opcode has 22,412 GitHub stars and react-codemirror has 2,258. opcode has the larger community by that measure.
Are opcode and react-codemirror free?
Both are open source. opcode is licensed under AGPL-3.0 and react-codemirror under MIT. Neither carries a licence fee.
What is the difference between opcode and react-codemirror?
opcode is written in TypeScript and react-codemirror 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, opcode or react-codemirror?
Choose opcode if you want the larger community (22,412 stars) or its AGPL-3.0 licence terms. Choose react-codemirror if its feature set, stack or MIT licence fits better. Both are self-hostable.