head to head · open source
opcode vs zasper
opcode has 22,422 GitHub stars, 1,711 forks, 332 open issues and last shipped 20 days ago. zasper has 2,354 stars, 79 forks, 2 open issues and last shipped 6 days ago. opcode leads on adoption by 853% (22,422 vs 2,354 stars). opcode is written in TypeScript under AGPL-3.0; zasper is written in TypeScript under AGPL-3.0. opcode has attracted 8% as many forks as stars, zasper 3%. zasper 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 | zasper | |
|---|---|---|
| GitHub stars | ★ 22K | ★ 2.4K |
| License | AGPL-3.0 | AGPL-3.0 |
| Written in | TypeScript | TypeScript |
| Last push | 2026-09-18 | 2026-10-02 |
| Forks | ⑂ 1.7K | ⑂ 79 |
| 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 zasper if
- You want the zasper feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and zasper 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 zasper
Zasper is a high performance, self hosted IDE for Jupyter notebooks that runs any Jupyter kernel from a single static binary, aimed at data scientists and teams who want JupyterLab's workflow without its resource footprint.
read the full zasper overview →
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Frequently asked questions
Is opcode or zasper more popular?
opcode has 22,422 GitHub stars and zasper has 2,354. opcode has the larger community by that measure.
Are opcode and zasper free?
Both are open source. opcode is licensed under AGPL-3.0 and zasper under AGPL-3.0. Neither carries a licence fee.
What is the difference between opcode and zasper?
opcode is written in TypeScript and zasper 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 zasper?
Choose opcode if you want the larger community (22,422 stars) or its AGPL-3.0 licence terms. Choose zasper if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.