Chartai vs ClassMind vs Napkin vs Mermaid Viewer

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

Your tool
Chartai
vs
Competitor 1
ClassMind
Competitor 2
Napkin
Competitor 3
Mermaid Viewer
Compare
4 tools · best value per row highlighted
Your tool Chartai
chartai.io
You land on Chartai and see a grid of quick start templates spanning eleven different visualization types
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Competitor ClassMind
classmind.app
ClassMind is an AI-powered smart educational tool specifically designed for educators to create, organize, and enhance learning materials. It offers a suite of features to streamline classroom prepara
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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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Competitor Mermaid Viewer
mermaidviewer.com
Mermaid Viewer runs entirely in your browser
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Traffic estimated monthly website traffic
Monthly visits
31.5Kvisits/mo
—
1.3Mvisits/mo
143.2Kvisits/mo
MoM change
▲ 14.1%
▲ 11.7%
▼ 8.5%
▼ 10.9%
6-month growth
+11.0%
+84.2%
-46.4%
-9.3%
Global rank web
#1,121,782
#13,515,168
#36,124
#317,277
Avg. last 3 months
31.2K
641
1.4M
163.4K
Bounce rate lower is better
40%
0%
41%
45%
Pages / visit
1.7
—
3.9
1.8
Visit duration
22s
—
2m 36s
19s
Traffic sources
● Direct 87% · ● Referral 13%
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● Direct 86% · ● Referral 9%
● Direct 81% · ● Referral 19%
ChartaiClassMindNapkinMermaid Viewer
0831.2K1.7M2.5M3.3MChartai · 25.4KChartai · 29.6KChartai · 26KChartai · 28.4KChartai · 27.5KChartai · 29.5KChartai · 34.5KChartai · 27.6KChartai · 31.5KClassMind · 551ClassMind · 938ClassMind · 1.9KClassMind · 1.2KClassMind · 909ClassMind · 1KNapkin · 3.3MNapkin · 2.7MNapkin · 2.4MNapkin · 2.3MNapkin · 2.4MNapkin · 2.1MNapkin · 1.8MNapkin · 1.6MNapkin · 1.4MNapkin · 1.3MMermaid Viewer · 158.9KMermaid Viewer · 157.9KMermaid Viewer · 184.8KMermaid Viewer · 170.5KMermaid Viewer · 186.3KMermaid Viewer · 160.7KMermaid Viewer · 143.2K1001K10K100K1M10MChartai · 25.4KChartai · 29.6KChartai · 26KChartai · 28.4KChartai · 27.5KChartai · 29.5KChartai · 34.5KChartai · 27.6KChartai · 31.5KClassMind · 551ClassMind · 938ClassMind · 1.9KClassMind · 1.2KClassMind · 909ClassMind · 1KNapkin · 3.3MNapkin · 2.7MNapkin · 2.4MNapkin · 2.3MNapkin · 2.4MNapkin · 2.1MNapkin · 1.8MNapkin · 1.6MNapkin · 1.4MNapkin · 1.3MMermaid Viewer · 158.9KMermaid Viewer · 157.9KMermaid Viewer · 184.8KMermaid Viewer · 170.5KMermaid Viewer · 186.3KMermaid Viewer · 160.7KMermaid Viewer · 143.2KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Free
Freemium
Freemium
Starting price
$5per month · free tier available
Free
$9per month · free tier available
$69.99per month · free tier available
Free tier
Free trial
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API access
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Plans
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Free FreeStarter $69.99/yrPro $119.99/yr
Capabilities input → output
Input
TextDataCode
TextDocuments
TextData
TextCode
Output
ImagesData
DocumentsSlidesText
SlidesImagesData
ImagesCode
Skill level
Beginner-friendly
Intermediate
Beginner-friendly
Intermediate
Categories
Productivity & OfficeAI ChartingAI Diagram Generator
Education & LearningProductivity & OfficeAI Book SummarizerAI Lesson Plan Generator+2 more
Design & CreativeProductivity & OfficeAI ChartingAI Diagram Generator+3 more
Productivity & OfficeAI Diagram Generator
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
8
13
7
6
Diagrams
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Flowcharts
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Mind maps
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Charts
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Data charts
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Infographics
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Presentations
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UML diagrams
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Book summaries
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Code diagramming
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Curriculum integration
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Gantt charts
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Interactive quizzes
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Lesson generation
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Lesson plans
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Quiz generation
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Teaching support
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Diagram assistance
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Mermaid images
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Question generation
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Student progress reports
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Summarizing
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Test generation
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Education
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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.