head to head · open source
Mermaid vs dtale
Mermaid has 90,981 GitHub stars, 9,444 forks, 1,781 open issues and last shipped yesterday. dtale has 5,237 stars, 448 forks, 71 open issues and last shipped 3 months ago. Mermaid leads on adoption by 1,637% (90,981 vs 5,237 stars). Mermaid is written in TypeScript under MIT; dtale is written in TypeScript under LGPL-2.1. Mermaid has attracted 10% as many forks as stars, dtale 9%. 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 | dtale | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 5.2K |
| License | MIT | LGPL-2.1 |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-02 | 2026-07-24 |
| Forks | ⑂ 9.4K | ⑂ 448 |
| 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 dtale if
- You want the dtale feature set and don't need the biggest community
- You prefer the LGPL-2.1 license terms
- Your stack matches TypeScript
- You evaluated both and dtale 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 dtale
Live Demo Animated US COVID 19 Deaths By State 3D Scatter Chart Surface Chart Network Analysis What is it? D Tale is the combination of a Flask back end and a React front end to bring you an easy way to view & analyze Pandas data structures. It integrates seamlessly with ipython notebooks & python/ipython terminals. Currently this tool supports such Pandas objects as DataFrame, Series, MultiIndex, DatetimeIndex & RangeIndex. Origins D Tale was the product of a SAS to Python conversion. What was originally a perl script wrapper on top of SAS's insight function is now a lightweight web client on top of Pandas data…
read the full dtale overview →
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Frequently asked questions
Is Mermaid or dtale more popular?
Mermaid has 90,981 GitHub stars and dtale has 5,237. Mermaid has the larger community by that measure.
Are Mermaid and dtale free?
Both are open source. Mermaid is licensed under MIT and dtale under LGPL-2.1. Neither carries a licence fee.
What is the difference between Mermaid and dtale?
Mermaid is written in TypeScript and dtale 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 dtale?
Choose Mermaid if you want the larger community (90,981 stars) or its MIT licence terms. Choose dtale if its feature set, stack or LGPL-2.1 licence fits better. Both are self-hostable.