# Mermaid

> Text-based diagramming platform with AI and a visual editor

Mermaid is the commercial diagramming platform from Mermaid Chart, the team behind the open-source Mermaid.js library. Diagrams can be written in Mermaid syntax, generated by AI from a prompt or a document, or adjusted in a visual editor, and the code and the canvas stay linked. It covers flowcharts, sequence diagrams, ER diagrams, Gantt charts, mind maps and other types, with live co-editing, slide presentations and plugins for code editors and documentation tools.

- **Category:** Whiteboards & Mind Maps
- **Made by:** Mermaid Chart
- **Website:** https://mermaid.ai
- **Runs on:** Web
- **Facts last checked:** Oct 6, 2026

## Pricing

Mermaid has a free plan. Paid plans start at $10 per user / month, billed annually ($120 a year).

- **Pricing model:** Free plan
- **Free plan:** Basic plan: 3 diagrams (the comparison table on the same page says up to 6) with a limited diagram size, 15 AI credits, one team and project, and co-editing and external sharing.
- **Free trial:** Free trial of Plus or Premium; the vendor does not state how long it lasts.

| Plan | Price | What you get |
| --- | --- | --- |
| Basic | $0 | 3 diagrams with a limited diagram size, 15 AI credits, and one team and project. Co-editing and external sharing are included. |
| Plus | $10 per user / month, billed annually ($120 a year) | Unlimited diagrams with no size limit and 300 AI credits per year, for individuals who diagram often. |
| Premium | $20 per user / month, billed annually ($240 a year) | Everything in Plus, plus 2,000 AI credits per year, unlimited free viewer seats, and unlimited teams and projects. |
| Enterprise | Custom | Everything in Premium, plus SSO, custom contracts and invoicing, IP management, user consolidation and a dedicated customer success manager. |

Read from https://mermaid.ai/pricing on Oct 6, 2026. Prices change, so confirm with Mermaid before buying.

## Key features

- **Diagrams from Mermaid code:** Diagrams are written in Mermaid syntax and laid out automatically. Clicking a node jumps to its code and clicking the code finds its shape, so the two stay in step.
- **Mermaid AI:** A description, an uploaded document or a pasted transcript becomes a first-draft diagram, and the AI suggests a fitting diagram type. Use is metered in credits below Enterprise.
- **Visual Editor:** Nodes, edges, labels, colors and shapes can be changed by clicking and dragging while the code rewrites itself, with node alignment and movable edges for tidying a layout.
- **Live co-editing and share links:** Teammates can co-edit a diagram at the same time, and a share link lets other people view it without logging in. Free viewer seats are part of Premium and Enterprise.
- **Plugins and MCP server:** Plugins cover VS Code, JetBrains IDEs, Cursor, Windsurf, Confluence, Jira, Google Docs, Word and PowerPoint. An MCP server lets Claude, VS Code and Cursor generate diagrams.
- **Presentations:** Existing diagrams become slides written in Markdown. A deck updates when its diagrams change and can be shared through a public link for viewing and comments.

## Good for

- Developers who already write Mermaid syntax in docs or Markdown
- Teams that want diagrams versioned and reviewed as text
- People who want AI to draft a diagram from a document or transcript
- Showing diagrams as slides without exporting them

## Worth knowing

- The free Basic plan is listed as 3 diagrams on its plan card and up to 6 in the comparison table, with a limited diagram size and 15 AI credits.
- Paid plans are billed annually only; the vendor's FAQ says monthly plans are not available.
- AI credits are capped at 300 a year on Plus and 2,000 a year on Premium; only Enterprise is listed as unlimited.
- Free viewer seats start at Premium, and SSO, invoicing and a customer success manager are limited to Enterprise.

## Works with

VS Code, JetBrains IDEs, Cursor, Claude Code, ChatGPT, Confluence, Jira, Google Docs

**Tags:** Diagrams, AI features, Real-time collaboration, Presentations

## Alternatives

- [Eraser](https://toolgpa.com/tools/eraser): AI diagramming and docs canvas for engineering teams. [Compare](https://toolgpa.com/compare/eraser-vs-mermaid)
- [draw.io](https://toolgpa.com/tools/draw-io): Free diagram editor that saves files to storage you choose. [Compare](https://toolgpa.com/compare/draw-io-vs-mermaid)
- [Lucidchart](https://toolgpa.com/tools/lucidchart): Browser-based diagramming for flowcharts, org charts and systems. [Compare](https://toolgpa.com/compare/lucidchart-vs-mermaid)
- [Whimsical](https://toolgpa.com/tools/whimsical): Whiteboard for flowcharts, wireframes, mind maps and docs. [Compare](https://toolgpa.com/compare/mermaid-vs-whimsical)
- [Excalidraw](https://toolgpa.com/tools/excalidraw): Open-source whiteboard for hand-drawn style sketches and diagrams. [Compare](https://toolgpa.com/compare/excalidraw-vs-mermaid)

## Sources

The prices, plans, platforms and features above were read from these pages on Oct 6, 2026:

- https://mermaid.ai/pricing
- https://mermaid.ai/rest-api/stripe/prices
- https://mermaid.ai/
- https://mermaid.ai/faq
- https://mermaid.ai/products/plugins
- https://mermaid.ai/products/visual-editor
- https://mermaid.ai/products/presentations
- https://mermaid.ai/open-source/

Page: https://toolgpa.com/tools/mermaid
Listed by ToolGPA (toolgpa.com).