Mermaid Chart
Diagramming software
- Features
- Ease of use
- Ease of management
- Quality of support
- Affordability
- Market presence
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$10 per user per month
Free TrialFree version
Small
Medium
Large
- Information technology and software
- Education and training
- Media and communications
What is Mermaid Chart
Mermaid Chart is a web-based diagramming tool for creating and editing Mermaid syntax diagrams (for example, flowcharts, sequence diagrams, and ER diagrams). It targets software teams and technical users who want diagrams that can be maintained as text and embedded in documentation workflows. The product combines a visual editor with Mermaid code editing and rendering to support diagram creation and iteration. It is commonly used alongside documentation and developer collaboration practices where text-based diagrams are preferred.
Mermaid-first diagram workflow
Mermaid Chart centers on Mermaid syntax, which makes diagrams easier to version, review, and reuse in text-based documentation. This approach fits teams that already standardize on Mermaid in Markdown and developer portals. It reduces reliance on purely manual drag-and-drop editing for many diagram types. It also helps keep diagrams consistent when generated or updated from code-like definitions.
Visual and code editing
The product supports both a visual editing experience and direct editing of Mermaid code. This dual mode helps mixed-skill teams where some users prefer a canvas while others prefer text. It also supports quick fixes by editing the underlying definition rather than reworking shapes. The rendered output updates from the Mermaid definition, keeping the diagram tied to its source.
Broad Mermaid diagram coverage
Mermaid Chart supports multiple Mermaid diagram types used in software and business documentation (such as flowcharts and sequence diagrams). This breadth can reduce the need to switch tools for different diagram formats within the same documentation set. It aligns well with teams that want a consistent diagram language across projects. It is particularly relevant for engineering and product documentation use cases.
Less suited for freeform whiteboarding
Because it is Mermaid-centric, Mermaid Chart is not optimized for open-ended brainstorming, sticky-note workshops, or highly freeform canvases. Teams that need facilitation features and broad whiteboard templates may find it less comprehensive. Diagram creation is constrained by what Mermaid syntax can express. For non-technical collaborators, text-first diagramming can add friction.
Dependent on Mermaid capabilities
Diagram expressiveness and styling are limited by Mermaid’s supported syntax and rendering behavior. Some advanced layout control, custom shape libraries, or highly polished presentation formatting can be harder than in general-purpose diagramming suites. Users may need to work around Mermaid constraints rather than directly manipulating every visual element. This can matter for diagrams intended for executive presentations or brand-specific styling.
Vendor details not fully verifiable
Publicly verifiable corporate details for the Mermaid Chart seller (such as founding year and headquarters) are not consistently available from authoritative sources. This can complicate vendor due diligence for procurement teams. Buyers may need to rely on the vendor’s own disclosures and contractual terms for compliance and support assurances. For regulated environments, this may increase evaluation effort.
Plan & Pricing
| Plan | Price | Key features & notes |
|---|---|---|
| Basic | Free | Includes basic editor: 3 diagrams, limited diagram size, limited AI. |
| Plus | $10 per user / month (billed annually) | All Basic features, unlimited diagrams, limitless diagram size, 300 AI credits per year, view & comment collaboration. |
| Premium | $20 per user / month (billed annually) | All Plus features, 2,000 AI credits per year, unlimited free viewer seats, team & project creation, co-editing & external sharing, SSO/security. |
| Enterprise | Custom pricing (contact sales) | All Premium features plus custom contract & invoicing, secure diagram ownership (IP transfer to admin), dedicated Customer Success Manager (CSM). |
Seller details
Mermaid Chart
San Francisco, California, United States
2022
Private
https://www.mermaidchart.com/
https://x.com/mermaidchart
https://www.linkedin.com/company/mermaid-chart
