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SPECIFICTION
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Mermaid Chart

mermaid.ai

From $12/mo Free plan WebAPIBrowser extension
Visit mermaid.ai
Spec score 7.9 #17 of 32 in AI Diagram Generators

What it is

Mermaid Chart turns plain-text Mermaid syntax into diagrams and refreshes the visual when the text changes. Mermaid AI can also create diagrams from natural-language prompts or uploaded PDF, Word and plain-text files. Supported types include flowcharts, sequence diagrams, Gantt charts, ER diagrams, timelines, mind maps, org charts, state and class diagrams, pie charts and quadrant charts. Teams can co-edit in real time, comment and share live links. Official plugins and add-ons connect it with development environments, AI assistants, documentation tools and office products, including VS Code, JetBrains IDEs, Cursor, Windsurf, Claude Code, ChatGPT, Confluence, Jira, Google Docs, Word and PowerPoint. Mermaid AI exports PNG and SVG files. Mermaid MCP can validate and render diagrams without authentication; authenticated users can use it to manage diagrams and projects. Basic costs nothing and includes three diagrams and 15 AI credits. Plus costs $12 a month billed annually; Premium costs $24 a month billed annually. Trial and paid-tier content is not used to train Mermaid AI models; Basic-tier content may be used to improve services.

Spec sheet

Audience
Mermaid describes the product as serving developers, data engineers, analysts, technical writers, project managers, designers, and other visual thinkers.Read 1 Oct 2026 · mermaid.ai
Integrations
Official plugins and add-ons cover VS Code, JetBrains IDEs, Cursor, Windsurf, Claude Code, ChatGPT, Confluence, Jira, Google Docs, Microsoft Word, and PowerPoint.Read 1 Oct 2026 · mermaid.ai
Security
Mermaid states that it provides secure access controls, encryption, SOC 2 compliance, and SSO.Read 1 Oct 2026 · mermaid.ai
Support
Enterprise is described as including custom contracts, support, and additional services.Read 1 Oct 2026 · mermaid.ai
AI data policy
Content from trial and paid tiers is never used to train Mermaid AI models, while Basic-tier content may be used to improve the services.Read 1 Oct 2026 · mermaid.ai
AI generation
Mermaid AI turns natural-language prompts and uploaded PDF, Word, or plain-text files into Mermaid diagrams.Read 1 Oct 2026 · mermaid.ai
Collaboration
The product supports real-time co-editing, comments, and shareable live links.Read 1 Oct 2026 · mermaid.ai
Diagram types
Supported diagram types include flowcharts, sequence diagrams, Gantt charts, ER diagrams, timelines, mind maps, org charts, state diagrams, class diagrams, pie charts, and quadrant charts.Read 1 Oct 2026 · mermaid.ai
Exports
Mermaid AI can export diagrams as PNG or SVG files.Read 1 Oct 2026 · mermaid.ai
Free-tier AI limit
The Basic plan includes 15 AI credits, while Plus includes 300 credits per year and Premium includes 2,000 credits per year.Read 1 Oct 2026 · mermaid-25331.zendesk.com
MCP server
Mermaid MCP can validate and render diagrams without authentication, while authenticated users can create, retrieve, update, and manage Mermaid Chart diagrams and projects.Read 1 Oct 2026 · mermaid.ai
Open-source origin
Mermaid Chart was born from the Mermaid open-source project and was founded by Knut Sveidqvist together with Open Core Ventures.Read 1 Oct 2026 · mermaid.ai
Text-to-diagramming
Mermaid renders diagrams from plain-text syntax and updates the visual when the text changes.Read 1 Oct 2026 · mermaid.ai

Plans and prices

Basic Free 3 diagrams · limited AI · 1 team and project Read 1 Oct 2026 · mermaid.ai
Plus $12 a month annually unlimited diagrams · 300 AI credits per year · view and comment collaboration Read 1 Oct 2026 · mermaid.ai
Premium $24 a month annually 2,000 AI credits per year · unlimited free viewer seats · co-editing · SSO Read 1 Oct 2026 · mermaid.ai
Enterprise Priced on request Premium features · custom contracts · support Read 1 Oct 2026 · mermaid.ai

Every Mermaid Chart plan and price →

Strong points and limits

Strong points

  • Plain text changes update the diagram visual.
  • Supports a wide range of diagram types.
  • Offers real-time co-editing, comments and live links.
  • Exports diagrams as PNG or SVG.
  • MCP can validate and render without authentication.

Limits

  • Basic is limited to three diagrams.
  • Basic includes 15 AI credits.
  • Basic-tier content may be used to improve services.
  • Paid plans are billed annually.

Who it suits

Mermaid Chart suits developers, data engineers, analysts, technical writers, project managers, designers and others who work with visual diagrams. It can also suit teams needing shared editing and comments.

Verdict

Mermaid Chart combines text-based diagramming with AI generation, collaboration and integrations. Basic has a three-diagram limit, while Plus and Premium add larger AI credit allowances and collaboration features.

Where Specifiction places it

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