head to head · open source
diagram-design vs flint-chart
diagram-design has 41,375 GitHub stars, 2,652 forks, 42 open issues and last shipped yesterday. flint-chart has 4,249 stars, 235 forks, 32 open issues and last shipped 2 days ago. diagram-design leads on adoption by 874% (41,375 vs 4,249 stars). diagram-design is written in HTML under MIT; flint-chart is written in TypeScript under MIT. diagram-design has attracted 6% as many forks as stars, flint-chart 6%. diagram-design was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (data-visualization), so they are genuine substitutes rather than adjacent tools.
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
| diagram-design | flint-chart | |
|---|---|---|
| GitHub stars | ★ 41K | ★ 4.2K |
| License | MIT | MIT |
| Written in | HTML | TypeScript |
| Last push | 2026-09-19 | 2026-09-18 |
| Forks | ⑂ 2.7K | ⑂ 235 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick diagram-design if
- You weight community size — 41K stars and counting
- You want the MIT license terms
- Your stack matches HTML
- 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 diagram-design
Diagram Design is a skill for Claude Code, Codex, Factory Droid, Pi, and other Agent Skills compatible hosts that generates editorial quality diagrams as self contained HTML and SVG, aimed at writers, engineers, and designers who need brand consistent visuals without opening Figma.
read the full diagram-design overview →
About flint-chart
Flint is an MIT licensed visualization language from Microsoft that lets AI agents turn simple, human editable chart specs into expressive, polished visualizations, and it is aimed at developers, analysts, and agent builders who want charts generated reliably from a chat or coding environment.
read the full flint-chart overview →
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Frequently asked questions
Is diagram-design or flint-chart more popular?
diagram-design has 41,375 GitHub stars and flint-chart has 4,249. diagram-design has the larger community by that measure.
Are diagram-design and flint-chart free?
Both are open source. diagram-design is licensed under MIT and flint-chart under MIT. Neither carries a licence fee.
What is the difference between diagram-design and flint-chart?
diagram-design is written in HTML 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, diagram-design or flint-chart?
Choose diagram-design if you want the larger community (41,375 stars) or its MIT licence terms. Choose flint-chart if its feature set, stack or MIT licence fits better. Both are self-hostable.