kitio.aiDiagram Generator vs Mermaid Viewer
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Diagram Generator starts at $9/mo and Mermaid Viewer starts at See pricing page. Check both pricing pages for current plans.
Creates flowcharts, ER diagrams and infographics from a text prompt
Freemium · $9/moAt a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Text to diagram
- Editable Mermaid output
- Web-grounded content
- 10+ visual styles
- Up to 4K export
- Live Mermaid preview
- Text-to-diagram AI
- Syntax error fixes
- SVG, PNG and PDF export
- Shared editing links
- Docker self-hosting
| Feature | Diagram Generator | Mermaid Viewer |
|---|---|---|
| Best for | Creates flowcharts, ER diagrams and infographics from a text prompt | Browser editor for Mermaid diagrams with AI code generation |
| Category | Design | Design |
| Pricing model | Freemium | Freemium |
| Starting price | $9/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | Diagram Generator | Mermaid Viewer |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Diagram Generator starts at $9/mo and Mermaid Viewer starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Developer
Free
- 5 one-time Pro credits
- All diagram types
- Up to 2K, watermarked
Starter
$9/mo
- 100 Pro credits a month
- No watermark
- Commercial license
Professional
$35/mo
- 400 Pro credits a month
- 4K generation
- Priority support
3 plans
Free
Free
- 3 diagrams
- 5 AI conversations per day
- Watermarked low-res PNG
Starter
$69.99/yr billed yearly
- 30 diagrams
- 500 AI conversations per month
- High-res PNG without watermark
- 30 saved versions
Pro
$119.99/yr billed yearly
- Unlimited diagrams
- Unlimited AI conversations
- PNG, JPG, PDF and SVG export
- 100 saved versions
Prices in USD, checked Nov 5, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Diagram Generator
- Choice of code or image output
- Pulls in current data
- Many diagram types
- Free credits are one-time only
- 4K output needs the top plan
- Still in public beta
Mermaid Viewer
- No install, runs in the browser
- AI drafts diagram code from text
- Many export formats on paid plans
- Free plan allows only 3 diagrams
- Free exports are low-res and watermarked
- Monthly prices not shown, only yearly
Which one should you choose?
Choose Diagram Generator if you want:
- Choice of code or image output
- Pulls in current data
- Many diagram types
Watch out: free credits are one-time only.
Choose Mermaid Viewer if you want:
- No install, runs in the browser
- AI drafts diagram code from text
- Many export formats on paid plans
Watch out: free plan allows only 3 diagrams.
Diagram Generator vs Mermaid Viewer FAQ
What is the difference between Diagram Generator and Mermaid Viewer?
Diagram Generator: Creates flowcharts, ER diagrams and infographics from a text prompt. Mermaid Viewer: Browser editor for Mermaid diagrams with AI code generation. Both are design tools.
Is Diagram Generator or Mermaid Viewer cheaper?
Diagram Generator starts at $9/mo and Mermaid Viewer starts at See pricing page. Check both pricing pages for current plans.
Do Diagram Generator and Mermaid Viewer have free plans?
Diagram Generator: Yes. Mermaid Viewer: Yes.
Who makes Diagram Generator?
Diagram Generator is made by Diagram Generator.
Who makes Mermaid Viewer?
Mermaid Viewer is made by Mermaid Viewer.
Which should I choose, Diagram Generator or Mermaid Viewer?
Choose Diagram Generator if you value choice of code or image output and pulls in current data. Choose Mermaid Viewer if you value no install, runs in the browser and ai drafts diagram code from text.