head to head · open source
Mermaid vs matplotplusplus
Mermaid has 90,299 GitHub stars, 9,266 forks, 1,781 open issues and last shipped 3 days ago. matplotplusplus has 4,930 stars, 388 forks, 82 open issues and last shipped 6 months ago. Mermaid leads on adoption by 1,732% (90,299 vs 4,930 stars). Mermaid is written in TypeScript under MIT; matplotplusplus is written in C++ under MIT. Mermaid has attracted 10% as many forks as stars, matplotplusplus 8%. 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 | matplotplusplus | |
|---|---|---|
| GitHub stars | ★ 90K | ★ 4.9K |
| License | MIT | MIT |
| Written in | TypeScript | C++ |
| Last push | 2026-09-15 | 2026-04-02 |
| Forks | ⑂ 9.3K | ⑂ 388 |
| 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 matplotplusplus if
- You want the matplotplusplus feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C++
- You evaluated both and matplotplusplus 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 matplotplusplus
Matplot++ is an MIT licensed C++ graphics library for data visualization, built for programmers and scientists who need to plot data from inside a C++ program rather than hand it off to another environment.
read the full matplotplusplus overview →
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Frequently asked questions
Is Mermaid or matplotplusplus more popular?
Mermaid has 90,299 GitHub stars and matplotplusplus has 4,930. Mermaid has the larger community by that measure.
Are Mermaid and matplotplusplus free?
Both are open source. Mermaid is licensed under MIT and matplotplusplus under MIT. Neither carries a licence fee.
What is the difference between Mermaid and matplotplusplus?
Mermaid is written in TypeScript and matplotplusplus in C++. 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 matplotplusplus?
Choose Mermaid if you want the larger community (90,299 stars) or its MIT licence terms. Choose matplotplusplus if its feature set, stack or MIT licence fits better. Both are self-hostable.