kitio.aiChatFlowchart vs Mermaid Viewer
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. ChatFlowchart starts at $9.90 one-time and Mermaid Viewer starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Text to diagram
- Image and PDF to editable diagram
- Edit by chat
- Draw.io, Mermaid and Excalidraw export
- Flowchart animation video
- Live Mermaid preview
- Text-to-diagram AI
- Syntax error fixes
- SVG, PNG and PDF export
- Shared editing links
- Docker self-hosting
| Feature | ChatFlowchart | Mermaid Viewer |
|---|---|---|
| Best for | Makes editable flowcharts from text, images and PDFs | Browser editor for Mermaid diagrams with AI code generation |
| Category | Design | Design |
| Pricing model | Freemium | Freemium |
| Starting price | $9.90 one-time | See pricing page |
| Free plan | Yes | Yes |
| Made by | ChatFlowchart | Mermaid Viewer |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
|
Pricing compared
ChatFlowchart starts at $9.90 one-time and Mermaid Viewer starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Free
Free
- Core AI diagram features
- No login required
- Watermarked PNG export
10-Credit Pack
$9.90 one-time
- 10 extra AI generations
- Credits never expire
Pro
$15.90/mo
- Unlimited AI diagrams
- Unlimited image-to-flowchart
- No-watermark HD exports
30-Day Pass
$19.90 one-time
- Pro access for 30 days
- Does not renew
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
ChatFlowchart
- Converts old diagram images to editable ones
- Exports to Draw.io and Mermaid
- Free use without signup
- Free exports are watermarked PNGs
- Tax or VAT added at checkout
- Complex diagrams may need manual cleanup
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 ChatFlowchart if you want:
- Converts old diagram images to editable ones
- Exports to Draw.io and Mermaid
- Free use without signup
Watch out: free exports are watermarked pngs.
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.
ChatFlowchart vs Mermaid Viewer FAQ
What is the difference between ChatFlowchart and Mermaid Viewer?
ChatFlowchart: Makes editable flowcharts from text, images and PDFs. Mermaid Viewer: Browser editor for Mermaid diagrams with AI code generation. Both are design tools.
Is ChatFlowchart or Mermaid Viewer cheaper?
ChatFlowchart starts at $9.90 one-time and Mermaid Viewer starts at See pricing page. Check both pricing pages for current plans.
Do ChatFlowchart and Mermaid Viewer have free plans?
ChatFlowchart: Yes. Mermaid Viewer: Yes.
Who makes ChatFlowchart?
ChatFlowchart is made by ChatFlowchart.
Who makes Mermaid Viewer?
Mermaid Viewer is made by Mermaid Viewer.
Which should I choose, ChatFlowchart or Mermaid Viewer?
Choose ChatFlowchart if you value converts old diagram images to editable ones and exports to draw.io and mermaid. Choose Mermaid Viewer if you value no install, runs in the browser and ai drafts diagram code from text.