Mermaid Viewer vs Whiteboard by Athena AI vs DG Diagram-Generator vs Napkin

Which one fits you in 2026? Traffic, pricing, input → output, tasks and community side by side.

Your tool
Mermaid Viewer
vs
Competitor 1
WBWhiteboard by Athena AI
Competitor 2
DG Diagram-Generator
Competitor 3
Napkin
Compare
4 tools · best value per row highlighted
Your tool Mermaid Viewer
mermaidviewer.com
Mermaid Viewer runs entirely in your browser
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Competitor WBWhiteboard by Athena AI
athenaboard.ai
Instant Visual Creation Describe your concept, and watch as AI instantly generates flowcharts, wireframes, mind maps, or UI prototypes—ready in seconds. Perfect for entrepreneurs, digital teams, and
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Competitor DG Diagram-Generator
diagram-generator.com
Transforming text descriptions into professional diagrams usually requires either specialized software skills or settling for basic auto-generated output
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Competitor Napkin
napkin.ai
Napkin works directly from your text: paste or import it, click generate, and it proposes visuals that match the ideas in the writing.
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Traffic estimated monthly website traffic
Monthly visits
143.2Kvisits/mo
1.1Kvisits/mo
10.8Kvisits/mo
1.3Mvisits/mo
MoM change
▼ 10.9%
▲ 1,238.1%
▼ 45.5%
▼ 8.5%
6-month growth
-9.3%
—
-30.7%
-46.4%
Global rank web
#317,277
#12,935,820
#2,199,388
#36,124
Avg. last 3 months
163.4K
402
15.9K
1.4M
Bounce rate lower is better
45%
38%
39%
41%
Pages / visit
1.8
1.1
1.6
3.9
Visit duration
19s
—
15s
2m 36s
Traffic sources
● Direct 81% · ● Referral 19%
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● Direct 86% · ● Referral 9%
Mermaid ViewerWhiteboard by Athena AIDG Diagram-GeneratorNapkin
0831.2K1.7M2.5M3.3MMermaid Viewer · 158.9KMermaid Viewer · 157.9KMermaid Viewer · 184.8KMermaid Viewer · 170.5KMermaid Viewer · 186.3KMermaid Viewer · 160.7KMermaid Viewer · 143.2KWhiteboard by Athena AI · 98Whiteboard by Athena AI · 174Whiteboard by Athena AI · 78Whiteboard by Athena AI · 84Whiteboard by Athena AI · 1.1KDG Diagram-Generator · 5.4KDG Diagram-Generator · 10.7KDG Diagram-Generator · 15.6KDG Diagram-Generator · 26.5KDG Diagram-Generator · 24.5KDG Diagram-Generator · 16.9KDG Diagram-Generator · 19.9KDG Diagram-Generator · 10.8KNapkin · 3.3MNapkin · 2.7MNapkin · 2.4MNapkin · 2.3MNapkin · 2.4MNapkin · 2.1MNapkin · 1.8MNapkin · 1.6MNapkin · 1.4MNapkin · 1.3M101001K10K100K1M10MMermaid Viewer · 158.9KMermaid Viewer · 157.9KMermaid Viewer · 184.8KMermaid Viewer · 170.5KMermaid Viewer · 186.3KMermaid Viewer · 160.7KMermaid Viewer · 143.2KWhiteboard by Athena AI · 98Whiteboard by Athena AI · 174Whiteboard by Athena AI · 78Whiteboard by Athena AI · 84Whiteboard by Athena AI · 1.1KDG Diagram-Generator · 5.4KDG Diagram-Generator · 10.7KDG Diagram-Generator · 15.6KDG Diagram-Generator · 26.5KDG Diagram-Generator · 24.5KDG Diagram-Generator · 16.9KDG Diagram-Generator · 19.9KDG Diagram-Generator · 10.8KNapkin · 3.3MNapkin · 2.7MNapkin · 2.4MNapkin · 2.3MNapkin · 2.4MNapkin · 2.1MNapkin · 1.8MNapkin · 1.6MNapkin · 1.4MNapkin · 1.3MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Freemium
Freemium
Starting price
$69.99per month · free tier available
$5.99per month · free tier available
$9per month · free tier available
$9per month · free tier available
Free tier
Free trial
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API access
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Plans
Free FreeStarter $69.99/yrPro $119.99/yr
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Developer FreeStarter $9/moProfessional $35/mo
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Capabilities input → output
Input
CodeText
Text
Text
DataText
Output
CodeImages
Images
CodeImages
DataImagesSlides
Skill level
Intermediate
Beginner-friendly
Beginner-friendly
Beginner-friendly
Categories
Productivity & OfficeAI Diagram Generator
Design & CreativeProductivity & OfficeAI Diagram GeneratorAI Mind Mapping+1 more
Design & CreativeProductivity & OfficeAI Diagram GeneratorAI Infographic Generator+1 more
Design & CreativeProductivity & OfficeAI ChartingAI Diagram Generator+3 more
Tasks what each tool can do · 2 shared · core   partial
Tasks covered
6
9
6
7
Diagrams
Flowcharts
Mind maps
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Infographics
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Diagram assistance
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Mermaid images
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UML diagrams
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Code diagramming
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Charts
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Data charts
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Wireframes
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Collaborative design
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Google meet assistance
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Presentations
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Prototyping
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UX design
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 0
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
0
0
0
Verified listing
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Traffic figures are third-party estimates for the tool's own domain; tools sharing a domain with a bigger product are not counted. Pricing is captured from each tool's site and may lag.