head to head · open source
Mermaid vs dash
Mermaid has 90,981 GitHub stars, 9,444 forks, 1,781 open issues and last shipped yesterday. dash has 24,476 stars, 2,335 forks, 480 open issues and last shipped yesterday. Mermaid leads on adoption by 272% (90,981 vs 24,476 stars). Mermaid is written in TypeScript under MIT; dash is written in Python under MIT. Mermaid has attracted 10% as many forks as stars, dash 10%. dash 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 | dash | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 24K |
| License | MIT | MIT |
| Written in | TypeScript | Python |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 9.4K | ⑂ 2.3K |
| 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 dash if
- You want the dash feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and dash 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 dash
Dash Dash is the most downloaded, trusted Python framework for building ML & data science web apps . Built on top of Plotly.js, React and Flask, Dash ties modern UI elements like dropdowns, sliders, and graphs directly to your analytical Python code. Read our tutorial (proudly crafted ❤️ with Dash itself). Docs: Create your first Dash app in under 5 minutes dash.gallery: Dash app gallery with Python & R code Dash App Examples To learn more about Dash, read the extensive announcement letter or jump in with the user guide. Dash OSS & Dash Enterprise With Dash Open Source, Dash apps run on your local laptop or…
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Frequently asked questions
Is Mermaid or dash more popular?
Mermaid has 90,981 GitHub stars and dash has 24,476. Mermaid has the larger community by that measure.
Are Mermaid and dash free?
Both are open source. Mermaid is licensed under MIT and dash under MIT. Neither carries a licence fee.
What is the difference between Mermaid and dash?
Mermaid is written in TypeScript and dash in Python. 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 dash?
Choose Mermaid if you want the larger community (90,981 stars) or its MIT licence terms. Choose dash if its feature set, stack or MIT licence fits better. Both are self-hostable.