
Create diagrams and charts from text in a simple, intuitive, and highly customizable way.
Free, no paid tierVisit WebsiteThe Bottom Line
- Price
- Free, no paid tier. Compare plans
Key facts
- Generates diagrams and charts from text definitions.
- Supports various diagram types like flowcharts and sequence diagrams.
- Simplifies visualization for developers and technical writers.
Pros
- Diagrams as code
- GitHub native support
- Free and open source
- Many diagram types
- Easy syntax
Cons
- Limited styling
- Complex diagrams hard
- Rendering varies
- Documentation gaps
- Less flexible than draw tools
What is Mermaid?
Available on: Web
Ratings Across the Web
Mermaid holds an aggregate rating of 4.7 out of 5 from 11 reviews across G2, last checked August 28, 2026.
Ratings aggregated from independent review platforms. Learn more
Key Features
- Diagram as code
- Flowcharts
- Sequence diagrams
- Gantt charts
- Git integration
- Markdown support
Pricing Plans
7-day Free TrialPricing checked Sep 27, 2026
| Plan | Price | Details |
|---|---|---|
| Open Source | $0 |
+1 more Show less
|
| Basic | $0 |
|
| Plus | $8/month |
|
| Premium | Custom |
|
Is Mermaid worth the price?
Mermaid offers a very generous free tier with its open-source option and a functional 'Basic' tier for free.
The 'Plus' tier at $8/month for unlimited diagrams and scalable AI is highly competitive. This pricing structure is excellent for individual developers and small teams looking for powerful diagramming tools.
How Mermaid's pricing compares
At $8/mo, billing unit not specified, Mermaid is mid-range of its 4 comparable direct competitors ($1.70 to $9/mo across the set).
Entry paid plan, monthly. Pricing checked Sep 27, 2026.
Reviews

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Mermaid FAQ
How does Mermaid simplify the creation of diagrams for documentation?
Which teams would benefit most from using Mermaid?
How is Mermaid's approach to diagramming different from a tool like Lucidchart?
What kind of limitations should users be aware of when using Mermaid?
Does Mermaid include a free tier for its diagramming capabilities?
Can Mermaid diagrams be integrated with GitHub workflows?
Source: mermaid.js.org