head to head · open source
Mermaid vs radzen-blazor
Mermaid has 90,299 GitHub stars, 9,266 forks, 1,781 open issues and last shipped 3 days ago. radzen-blazor has 4,348 stars, 957 forks, 32 open issues and last shipped yesterday. Mermaid leads on adoption by 1,977% (90,299 vs 4,348 stars). Mermaid is written in TypeScript under MIT; radzen-blazor is written in C# under MIT. Mermaid has attracted 10% as many forks as stars, radzen-blazor 22%. radzen-blazor 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 | radzen-blazor | |
|---|---|---|
| GitHub stars | ★ 90K | ★ 4.3K |
| License | MIT | MIT |
| Written in | TypeScript | C# |
| Last push | 2026-09-15 | 2026-09-17 |
| Forks | ⑂ 9.3K | ⑂ 957 |
| 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 radzen-blazor if
- You want the radzen-blazor feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and radzen-blazor 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 radzen-blazor
Radzen Blazor Components is a free, MIT licensed library of more than 145 native UI components for developers building Blazor Server, Blazor WebAssembly, and .NET MAUI Blazor Hybrid applications on .NET, distributed as the Radzen.Blazor NuGet package.
read the full radzen-blazor overview →
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Frequently asked questions
Is Mermaid or radzen-blazor more popular?
Mermaid has 90,299 GitHub stars and radzen-blazor has 4,348. Mermaid has the larger community by that measure.
Are Mermaid and radzen-blazor free?
Both are open source. Mermaid is licensed under MIT and radzen-blazor under MIT. Neither carries a licence fee.
What is the difference between Mermaid and radzen-blazor?
Mermaid is written in TypeScript and radzen-blazor in C#. 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 radzen-blazor?
Choose Mermaid if you want the larger community (90,299 stars) or its MIT licence terms. Choose radzen-blazor if its feature set, stack or MIT licence fits better. Both are self-hostable.