head to head · open source
Mermaid vs vizzu-lib
Mermaid has 90,981 GitHub stars, 9,444 forks, 1,781 open issues and last shipped yesterday. vizzu-lib has 2,047 stars, 87 forks, 3 open issues and last shipped 7 months ago. Mermaid leads on adoption by 4,345% (90,981 vs 2,047 stars). Mermaid is written in TypeScript under MIT; vizzu-lib is written in JavaScript under Apache-2.0. Mermaid has attracted 10% as many forks as stars, vizzu-lib 4%. Mermaid 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 | vizzu-lib | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 2.0K |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | JavaScript |
| Last push | 2026-11-02 | 2026-04-20 |
| Forks | ⑂ 9.4K | ⑂ 87 |
| 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 vizzu-lib if
- You want the vizzu-lib feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches JavaScript
- You evaluated both and vizzu-lib 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 vizzu-lib
Vizzu Library for animated data visualizations and data stories. Documentation · Examples · Code reference · Repository · Blog Vizzu About The Project Vizzu is a free, open source Javascript/C++ library utilizing a generic dataviz engine that generates many types of charts and seamlessly animates between them. It can be used to create static charts but more importantly, it is designed for building animated data stories and interactive explorers as Vizzu enables showing different perspectives of the data that the viewers can easily follow due to the animation. Main features: Designed with animation in focus…
read the full vizzu-lib overview →
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Frequently asked questions
Is Mermaid or vizzu-lib more popular?
Mermaid has 90,981 GitHub stars and vizzu-lib has 2,047. Mermaid has the larger community by that measure.
Are Mermaid and vizzu-lib free?
Both are open source. Mermaid is licensed under MIT and vizzu-lib under Apache-2.0. Neither carries a licence fee.
What is the difference between Mermaid and vizzu-lib?
Mermaid is written in TypeScript and vizzu-lib in JavaScript. 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 vizzu-lib?
Choose Mermaid if you want the larger community (90,981 stars) or its MIT licence terms. Choose vizzu-lib if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.