Mermaid Viewer vs Whiteboard by Athena AI 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
Napkin
Competitor 3
Suggested competitors for Mermaid Viewer: Tenorshare AI Diagrimo91% Whimsical87% ERBuilder85% Flowova AI85% AI Diagram Maker84% Eraser84% CodeViz82% DG Diagram-Generator82%
Compare
3 tools · best value per row highlighted
Your tool Mermaid Viewer
mermaidviewer.com
Mermaid Viewer runs entirely in your browser
Remove
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
Make main Remove
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.
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
143.2Kvisits/mo
1.1Kvisits/mo
1.3Mvisits/mo
MoM change
▼ 10.9%
▲ 1,238.1%
▼ 8.5%
6-month growth
-9.3%
—
-46.4%
Global rank web
#317,277
#12,935,820
#36,124
Avg. last 3 months
163.4K
402
1.4M
Bounce rate lower is better
45%
38%
41%
Pages / visit
1.8
1.1
3.9
Visit duration
19s
—
2m 36s
Traffic sources
● Direct 81% · ● Referral 19%
—
● Direct 86% · ● Referral 9%
Mermaid ViewerWhiteboard by Athena AINapkin
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 · 1.1KNapkin · 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 · 1.1KNapkin · 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
Starting price
$69.99per month · free tier available
$5.99per month · free tier available
$9per month · free tier available
Free tier
Free trial
–
–
–
API access
–
–
–
Plans
Free FreeStarter $69.99/yrPro $119.99/yr
—
—
Capabilities input → output
Input
CodeText
Text
DataText
Output
CodeImages
Images
DataImagesSlides
Skill level
Intermediate
Beginner-friendly
Beginner-friendly
Categories
Productivity & OfficeAI Diagram Generator
Design & CreativeProductivity & OfficeAI Diagram GeneratorAI Mind Mapping+1 more
Design & CreativeProductivity & OfficeAI ChartingAI Diagram Generator+3 more
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
3
3
7
Diagrams
Flowcharts
–
Mind maps
–
Infographics
–
–
Charts
–
–
Data charts
–
–
Diagram assistance
–
–
Presentations
–
–
UX design
–
–
Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 0
Saves
0
0
0
Reviews
0
0
0
Prompts
0
0
0
Verified listing
–
–
–

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.