Overview
Mermaid Chart is the commercial service from the team behind Mermaid, the open-source text syntax for generating flowcharts, sequence, class, Gantt and other diagrams from code. The company states that the core Mermaid syntax remains free and open source, while paid plans add AI features, diagram storage, real-time collaboration, integrations and security controls.[16]
Plans: Basic is free with three diagrams; Plus costs US$10 per user per month billed annually with unlimited diagrams; Premium costs US$20 with 2,000 AI credits a year, shared workflow runs and unlimited free viewers; Enterprise is custom with SSO.[16]
Diagrams-as-code suit engineering teams that keep documentation in Git, since diagrams can be reviewed like source code and rendered by GitHub, GitLab and many documentation tools. The approach is unfamiliar to non-technical users, and visual control is limited compared with drag-and-drop editors.
Mermaid Chart features
- Text-based Mermaid syntax
- Visual and code editors
- AI diagram generation
- Real-time collaboration
- SSO (Enterprise)
Mermaid Chart pricing
Basic free (3 diagrams); Plus $10/user/month annual; Premium $20/user/month annual; Enterprise custom.
Mermaid Chart strengths and limitations
Strengths
- Diagrams versioned like code
- Free open-source syntax
- Free viewers on Premium
Limitations
- Steep for non-technical users
- Limited layout control
- Free plan only 3 diagrams
Appears in
Mermaid Chart alternatives and competitors
Alternatives to Mermaid Chart: companies ranked in the same lists.
Lucidchart
Microsoft Power BI- draw.io (diagrams.net)
Miro- Figma FigJam
Creately- Whimsical
Gliffy- SmartDraw
- Cacoo
OmniGraffle
Excalidraw
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