head to head · open source
Mermaid vs flint-chart
Mermaid has 90,299 GitHub stars, 9,266 forks, 1,781 open issues and last shipped 3 days ago. flint-chart has 4,231 stars, 235 forks, 32 open issues and last shipped 2 days ago. Mermaid leads on adoption by 2,034% (90,299 vs 4,231 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%. flint-chart 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.
← all 8884 open source comparisons
Side by side
| Mermaid | flint-chart | |
|---|---|---|
| GitHub stars | ★ 90K | ★ 4.2K |
| License | MIT | MIT |
| Written in | TypeScript | TypeScript |
| Last push | 2026-09-15 | 2026-09-16 |
| Forks | ⑂ 9.3K | ⑂ 235 |
| 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 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 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 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, or…
read the full flint-chart overview →
More in Data & Analytics
Related comparisons
More Business Intelligence & Reporting projects
Compare either of these against the rest of the Business Intelligence & Reporting field.
Frequently asked questions
Is Mermaid or flint-chart more popular?
Mermaid has 90,299 GitHub stars and flint-chart has 4,231. 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 (90,299 stars) or its MIT licence terms. Choose flint-chart if its feature set, stack or MIT licence fits better. Both are self-hostable.