| Official site | mermaid.js.org |
|---|---|
| Price tier | Open source |
| Platforms | Web, Markdown |
| License | MIT |
| Since | 2014 |
| Origin | Community |
| Status | Active |
| Category | Diagrams |
Mermaid is a Diagrams tool from Community, first released in 2014. Diagrams as text: flowcharts, sequences, ER. Status: Active.
Mermaid is Open source. Confirm the current plan on the official site before you quote a number.
What holds up: You can keep using Mermaid if the company behind the website disappears, because the MIT license covers the code. Mermaid runs on Web, Markdown. The maintainers are a community, not a single vendor account you can phone.
What does not: Mermaid dates from 2014. Newer tools have fewer years of file formats and fewer written guides.
The closest listed alternative is PlantUML: Text diagrams, especially UML.
Other tools compared in the same sitting: Excalidraw (2020, Open source): Hand-drawn style whiteboard. diagrams.net (2005, Open source): Draw.io: free general diagram editor.
Where to compare
8 alternatives to Mermaid. Open that page to compare them.
Catalogued 2026-11-09.