head to head · open source
Mermaid vs react-simple-maps
Mermaid has 90,299 GitHub stars, 9,266 forks, 1,781 open issues and last shipped 3 days ago. react-simple-maps has 3,313 stars, 463 forks, 170 open issues and last shipped 6 days ago. Mermaid leads on adoption by 2,626% (90,299 vs 3,313 stars). Mermaid is written in TypeScript under MIT; react-simple-maps is written in TypeScript under MIT. Mermaid has attracted 10% as many forks as stars, react-simple-maps 14%. 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 | react-simple-maps | |
|---|---|---|
| GitHub stars | ★ 90K | ★ 3.3K |
| License | MIT | MIT |
| Written in | TypeScript | TypeScript |
| Last push | 2026-09-15 | 2026-09-12 |
| Forks | ⑂ 9.3K | ⑂ 463 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Mermaid if
- You weight community size — 90K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick react-simple-maps if
- You want the react-simple-maps feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and react-simple-maps fits your workflow better
About Mermaid
Mermaid is a JavaScript based diagramming tool that renders diagrams from Markdown like text definitions. It lives in the JavaScript/TypeScript ecosystem and operates both in the browser and in Node.js environments. The project’s core purpose is to eliminate the gap between software development and documentation by letting developers write diagrams alongside code, avoiding the rot and overhead of manual diagram maintenance.
read the full Mermaid overview →
About react-simple-maps
React Simple Maps Compose map charts the same way you would write any other layout. Fully typed mature api with high test coverage, built on d3 geo and topojson. Read the docs to get started with React Simple Maps. Why React Simple Maps aims to make working with svg maps in react easier. It handles tasks such as panning, zooming and simple rendering optimization, and takes advantage of parts of d3 geo and topojson client instead of relying on the entire d3 library. Since React Simple Maps leaves DOM work to react, it also plays nicely with other react component libraries. Install Usage React simple maps exposes a…
read the full react-simple-maps overview →
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Frequently asked questions
Is Mermaid or react-simple-maps more popular?
Mermaid has 90,299 GitHub stars and react-simple-maps has 3,313. Mermaid has the larger community by that measure.
Are Mermaid and react-simple-maps free?
Both are open source. Mermaid is licensed under MIT and react-simple-maps under MIT. Neither carries a licence fee.
What is the difference between Mermaid and react-simple-maps?
Mermaid is written in TypeScript and react-simple-maps 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 react-simple-maps?
Choose Mermaid if you want the larger community (90,299 stars) or its MIT licence terms. Choose react-simple-maps if its feature set, stack or MIT licence fits better. Both are self-hostable.