head to head · open source
Mermaid vs unovis
Mermaid has 90,981 GitHub stars, 9,444 forks, 1,781 open issues and last shipped yesterday. unovis has 2,861 stars, 75 forks, 100 open issues and last shipped 5 days ago. Mermaid leads on adoption by 3,080% (90,981 vs 2,861 stars). Mermaid is written in TypeScript under MIT; unovis is written in TypeScript under Apache-2.0. Mermaid has attracted 10% as many forks as stars, unovis 3%. 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 | unovis | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 2.9K |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-02 | 2026-10-29 |
| Forks | ⑂ 9.4K | ⑂ 75 |
| 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 unovis if
- You want the unovis feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and unovis 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 unovis
🟨 Unovis is a modular data visualization framework for React, Angular, Svelte, Vue, Solid and vanilla TypeScript or JavaScript: 📈 🗺 It has charts, maps, network graphs, and more! 🌳 Tree shakable and supports individual component imports to reduce your bundle size; 🎨 Highly customizable, thanks to the CSS variables support. Learn more about Unovis on unovis.dev Quick Start You can install the core of the library @unovis/ts and framework specific packages (if you use React, Angular, Svelte, Vue or Solid) from NPM: Now you can import components and create your first chart! Here's how to build a simple line…
read the full unovis overview →
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Frequently asked questions
Is Mermaid or unovis more popular?
Mermaid has 90,981 GitHub stars and unovis has 2,861. Mermaid has the larger community by that measure.
Are Mermaid and unovis free?
Both are open source. Mermaid is licensed under MIT and unovis under Apache-2.0. Neither carries a licence fee.
What is the difference between Mermaid and unovis?
Mermaid is written in TypeScript and unovis 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, Mermaid or unovis?
Choose Mermaid if you want the larger community (90,981 stars) or its MIT licence terms. Choose unovis if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.