Mermaid

Mermaid is a diagramming platform built on the open-source Mermaid.js library, created by the same team. Users can generate diagrams by prompting an AI assistant, uploading documents or transcripts, writing Mermaid syntax in code, or using a visual drag-and-drop editor. The page describes real-time co-editing, sharing via a link without login, rendering in IDEs and docs, and an MCP server that connects to tools such as Claude, VS Code, and Cursor. Enterprise features mentioned include SSO, access controls, encryption, and SOC 2 compliance. Plans include a free Basic plan and paid plans, with an Enterprise tier for larger organizations.

Key features

• Create diagrams with AI from text prompts, uploaded docs, or pasted transcripts
• Write diagrams in Mermaid syntax with live layout and node-to-code linking
• Visual editor with node alignment and edge reattachment
• Real-time co-editing and sharing via a single link without login
• Render diagrams in IDEs and embed in docs and wikis
• MCP server to generate, validate, and render diagrams from Claude, VS Code, and Cursor
• Integrations mentioned include GitHub Copilot, Confluence, Jira, Visual Studio Code, JetBrains IDEs, Google Docs, and ChatGPT
• Supports diagram types including flowchart, sequence, Gantt, ER, timeline, mind map, org chart, block, state, Git graph, user journey, class, pie, quadrant, and Sankey
• Enterprise features including SSO, access controls, encryption, and SOC 2 compliance
• Presentation mode to walk people through diagrams

Best suited for

• Developers and software architects documenting systems
• DevOps engineers diagramming CI/CD pipelines and infrastructure
• Project managers planning timelines and workflows
• Business analysts documenting processes
• Technical writers and documentation specialists
• Teams collaborating on diagrams in real time

Pricing

Mermaid offers a free Basic plan. Paid plans add advanced collaboration, more AI credits, and file uploads. An Enterprise plan is available with SSO, custom contracts, and dedicated support; specific prices are not stated on the page.