Mermaid Chart
Mermaid Chart turns plain-text Mermaid syntax into diagrams and updates the visual when the text changes.
What Mermaid Chart is
Mermaid Chart turns plain-text Mermaid syntax into diagrams and updates 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, documentation, AI, and office tools, including VS Code, JetBrains IDEs, Cursor, Windsurf, Claude Code, ChatGPT, Confluence, Jira, Google Docs, Word, and PowerPoint. Mermaid AI exports diagrams as PNG or SVG. The Basic plan is free and includes three diagrams, limited AI, and one team and project; it includes 15 AI credits. Plus costs $12 a month billed annually, and Premium costs $24 a month billed annually. Mermaid says trial and paid-tier content is not used to train its AI models, while Basic-tier content may be used to improve services.
Good
- Converts Mermaid text syntax into diagrams.
- AI can use prompts and uploaded documents.
- Supports a wide range of diagram types.
- Teams can co-edit, comment, and share live links.
- Basic plan includes three diagrams and 15 AI credits.
Watch out
- Basic plan is limited to three diagrams.
- Basic-tier content may be used to improve services.
- Plus costs $12 a month billed annually.
- Premium costs $24 a month billed annually.
Who it suits
Mermaid Chart suits people who want to create diagrams from text or prompts, including developers, analysts, technical writers, project managers, and designers. Teams may value its live co-editing and comments.
Verdict
Mermaid Chart combines text-based diagramming with AI generation and team collaboration. The free Basic plan is limited, and users should note the different AI data policy for Basic content.
Plans and prices
From Mermaid Chart's own pricing page, checked 1 Oct 2001.
| Plan | Price | What it gives you |
|---|---|---|
| Basic | Free | 3 diagrams · limited AI · 1 team and project |
| Plus | $12 a month | unlimited diagrams · 300 AI credits per year · view and comment collaboration · annually |
| Premium | $24 a month | 2,000 AI credits per year · unlimited free viewer seats · co-editing · SSO · annually |
| Enterprise | Priced on request | Premium features · custom contracts · support |
The facts
Each one read from Mermaid Chart's own pages, with the date it was checked.
What it does
- 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.checked 1 Oct 2001
- AI generation
- Mermaid AI turns natural-language prompts and uploaded PDF, Word, or plain-text files into Mermaid diagrams.checked 1 Oct 2001
- Audience
- Mermaid describes the product as serving developers, data engineers, analysts, technical writers, project managers, designers, and other visual thinkers.checked 1 Oct 2001
- Collaboration
- The product supports real-time co-editing, comments, and shareable live links.checked 1 Oct 2001
- 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.checked 1 Oct 2001
- Exports
- Mermaid AI can export diagrams as PNG or SVG files.checked 1 Oct 2001
- Integrations
- Official plugins and add-ons cover VS Code, JetBrains IDEs, Cursor, Windsurf, Claude Code, ChatGPT, Confluence, Jira, Google Docs, Microsoft Word, and PowerPoint.checked 1 Oct 2001
- 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.checked 1 Oct 2001
- Open-source origin
- Mermaid Chart was born from the Mermaid open-source project and was founded by Knut Sveidqvist together with Open Core Ventures.checked 1 Oct 2001
- Security
- Mermaid states that it provides secure access controls, encryption, SOC 2 compliance, and SSO.checked 1 Oct 2001
- Support
- Enterprise is described as including custom contracts, support, and additional services.checked 1 Oct 2001
- Text-to-diagramming
- Mermaid renders diagrams from plain-text syntax and updates the visual when the text changes.checked 1 Oct 2001
Money
- 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.checked 1 Oct 2001
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