head to head · open source
Mermaid vs reaviz
Mermaid has 90,981 GitHub stars, 9,444 forks, 1,781 open issues and last shipped yesterday. reaviz has 1,254 stars, 124 forks, 32 open issues and last shipped 3 months ago. Mermaid leads on adoption by 7,155% (90,981 vs 1,254 stars). Mermaid is written in TypeScript under MIT; reaviz is written in TypeScript under Apache-2.0. Mermaid has attracted 10% as many forks as stars, reaviz 10%. 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 | reaviz | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 1.3K |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-02 | 2026-08-10 |
| Forks | ⑂ 9.4K | ⑂ 124 |
| 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 reaviz if
- You want the reaviz 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 reaviz 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 reaviz
Data visualization library for React REAVIZ is a modular chart component library that leverages React natively for rendering the components while using D3js under the hood for calculations. The library provides an easy way to get started creating charts without sacrificing customization ability. 🚀 Quick Links Website Docs Blocks Storybook Changelog 🏗️ Other Projects Reagraph Open source library for large webgl based network graphs. Reablocks Open source component library for React based on Tailwind. Reaflow Open source library for workflow and diagram graphs. Reachat Open source library for building LLM/Chat…
read the full reaviz overview →
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Frequently asked questions
Is Mermaid or reaviz more popular?
Mermaid has 90,981 GitHub stars and reaviz has 1,254. Mermaid has the larger community by that measure.
Are Mermaid and reaviz free?
Both are open source. Mermaid is licensed under MIT and reaviz under Apache-2.0. Neither carries a licence fee.
What is the difference between Mermaid and reaviz?
Mermaid is written in TypeScript and reaviz 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 reaviz?
Choose Mermaid if you want the larger community (90,981 stars) or its MIT licence terms. Choose reaviz if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.