M
Mermaid
Description
A diagramming platform for flowcharts, diagrams and documentation, made by the team behind the open-source Mermaid.js library. A diagram can be built by typing a prompt in the canvas, by dropping in a document, or by writing it in code, and the diagram is built automatically. It supports many diagram types, such as quadrant charts and Sankey diagrams. It is used by developers, data engineers, analysts, educators, technical writers and project managers.
Pros and cons
Pros
- Diagram from a prompt, a document or code
- Built by the team behind the open-source Mermaid.js
- Many diagram types
Cons
- Free plan is limited by the number of diagrams
- Interface in English
Key facts
- Free access
- Yes The free plan is limited in the number of diagrams; unlimited diagrams and AI credits are on paid plans
- Pricing
- Pricing on the official site →
- Developer
- Mermaid Chart
- Checked on
- Oct 20, 2026
Editorial score
How strongly the AI Expertise editors recommend this tool for each of its categories right now, on a 0–10 scale. The score combines output quality, features, beginner friendliness and freshness.