head to head · open source
Mermaid vs flint-chart
Mermaid has 90,981 GitHub stars, 9,444 forks, 1,781 open issues and last shipped yesterday. flint-chart has 4,529 stars, 268 forks, 32 open issues and last shipped 2 days ago. Mermaid leads on adoption by 1,909% (90,981 vs 4,529 stars). Mermaid is written in TypeScript under MIT; flint-chart is written in TypeScript under MIT. Mermaid has attracted 10% as many forks as stars, flint-chart 6%. 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 | flint-chart | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 4.5K |
| License | MIT | MIT |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-02 | 2026-11-01 |
| Forks | ⑂ 9.4K | ⑂ 268 |
| 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 flint-chart if
- You want the flint-chart feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and flint-chart 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 flint-chart
Flint: A Visualization Language for the AI Era Please visit: Flint Project Site Visual Themes MCP Server Guide 中文主页 Flint is a visualization intermediate language that lets AI agents turn simple, human editable chart specs into expressive, polished visualizations . Rather than requiring agents to hardcode verbose parameters for scales, axes, spacing, labels, and layout, Flint derives those decisions from a high level semantic specification, the data, and an optional visual theme (e.g., New York Times, Economist, Swiss, and McKinsey). A compact spec compiles to native Vega Lite, ECharts, Chart.js, Plotly specs…
read the full flint-chart overview →
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Frequently asked questions
Is Mermaid or flint-chart more popular?
Mermaid has 90,981 GitHub stars and flint-chart has 4,529. Mermaid has the larger community by that measure.
Are Mermaid and flint-chart free?
Both are open source. Mermaid is licensed under MIT and flint-chart under MIT. Neither carries a licence fee.
What is the difference between Mermaid and flint-chart?
Mermaid is written in TypeScript and flint-chart 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 flint-chart?
Choose Mermaid if you want the larger community (90,981 stars) or its MIT licence terms. Choose flint-chart if its feature set, stack or MIT licence fits better. Both are self-hostable.