head to head · open source
Mermaid vs vizro
Mermaid has 90,981 GitHub stars, 9,444 forks, 1,781 open issues and last shipped yesterday. vizro has 3,818 stars, 305 forks, 37 open issues and last shipped yesterday. Mermaid leads on adoption by 2,283% (90,981 vs 3,818 stars). Mermaid is written in TypeScript under MIT; vizro is written in Python under Apache-2.0. Mermaid has attracted 10% as many forks as stars, vizro 8%. vizro 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
| Mermaid | vizro | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 3.8K |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | Python |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 9.4K | ⑂ 305 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Mermaid if
- You weight community size — 91K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick vizro if
- You want the vizro feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and vizro fits your workflow better
About Mermaid
Mermaid Generate diagrams from Markdown like text. Live Editor! 📖 Documentation 🚀 Getting Started 🌐 CDN 🙌 Join Us 简体中文 Try Live Editor previews of future releases: Develop Next :trophy: Mermaid was nominated and won the JS Open Source Awards (2019) in the category "The most exciting use of technology"!!! Thanks to all involved, people committing pull requests, people answering questions! 🙏 Table of content Expand contents About Examples Release Related projects Contributors Security and safe diagrams Reporting vulnerabilities Appreciation About Mermaid is a JavaScript based diagramming and charting tool…
read the full Mermaid overview →
About vizro
Vizro is a low code toolkit for building high quality data visualization apps Documentation Get Started What is Vizro? Vizro is an open source Python based toolkit. Use it to build beautiful and powerful data visualization apps quickly and easily, without needing advanced engineering or visual design expertise. Then customize and deploy your app to production at scale. In just a few lines of simple low code configuration, with in built visual design best practices, you can quickly assemble high quality, multi page prototypes, that are production ready. Every Vizro app is defined by a simple configuration, using…
read the full vizro overview →
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Frequently asked questions
Is Mermaid or vizro more popular?
Mermaid has 90,981 GitHub stars and vizro has 3,818. Mermaid has the larger community by that measure.
Are Mermaid and vizro free?
Both are open source. Mermaid is licensed under MIT and vizro under Apache-2.0. Neither carries a licence fee.
What is the difference between Mermaid and vizro?
Mermaid is written in TypeScript and vizro in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Mermaid or vizro?
Choose Mermaid if you want the larger community (90,981 stars) or its MIT licence terms. Choose vizro if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.