ERBuilder vs Mermaid Viewer vs AI Diagram Maker vs Napkin

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

Your tool
ERBuilder
vs
Competitor 1
Mermaid Viewer
Competitor 2
AI Diagram Maker
Competitor 3
Napkin
Compare
4 tools · best value per row highlighted
Your tool ERBuilder
soft-builder.com
ERBuilder is a data modeling application from Softbuilder, and its generative AI feature turns plain-language descriptions into entity-relationship diagrams.
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Competitor Mermaid Viewer
mermaidviewer.com
Mermaid Viewer runs entirely in your browser
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Competitor AI Diagram Maker
aidiagrammaker.com
The AI Diagram Maker is an intelligent tool designed to help users generate various types of diagram
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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
5.4Kvisits/mo
143.2Kvisits/mo
—
1.3Mvisits/mo
MoM change
▼ 6.3%
▼ 10.9%
—
▼ 8.5%
6-month growth
-22.4%
-9.3%
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-46.4%
Global rank web
#3,419,998
#317,277
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#36,124
Avg. last 3 months
5.9K
163.4K
—
1.4M
Bounce rate lower is better
39%
45%
0%
41%
Pages / visit
1.9
1.8
—
3.9
Visit duration
15s
19s
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2m 36s
Traffic sources
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● Direct 81% · ● Referral 19%
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● Direct 86% · ● Referral 9%
ERBuilderMermaid ViewerAI Diagram MakerNapkin
0831.2K1.7M2.5M3.3MERBuilder · 10.9KERBuilder · 12.8KERBuilder · 16KERBuilder · 7KERBuilder · 8.8KERBuilder · 8.8KERBuilder · 6.4KERBuilder · 5.8KERBuilder · 5.4KMermaid Viewer · 158.9KMermaid Viewer · 157.9KMermaid Viewer · 184.8KMermaid Viewer · 170.5KMermaid Viewer · 186.3KMermaid Viewer · 160.7KMermaid Viewer · 143.2KNapkin · 3.3MNapkin · 2.7MNapkin · 2.4MNapkin · 2.3MNapkin · 2.4MNapkin · 2.1MNapkin · 1.8MNapkin · 1.6MNapkin · 1.4MNapkin · 1.3M1K10K100K1M10MERBuilder · 10.9KERBuilder · 12.8KERBuilder · 16KERBuilder · 7KERBuilder · 8.8KERBuilder · 8.8KERBuilder · 6.4KERBuilder · 5.8KERBuilder · 5.4KMermaid Viewer · 158.9KMermaid Viewer · 157.9KMermaid Viewer · 184.8KMermaid Viewer · 170.5KMermaid Viewer · 186.3KMermaid Viewer · 160.7KMermaid Viewer · 143.2KNapkin · 3.3MNapkin · 2.7MNapkin · 2.4MNapkin · 2.3MNapkin · 2.4MNapkin · 2.1MNapkin · 1.8MNapkin · 1.6MNapkin · 1.4MNapkin · 1.3MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Free Trial
Freemium
Freemium
Freemium
Starting price
$139per month
$69.99per month · free tier available
$10per month · free tier available
$9per month · free tier available
Free tier
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Free trial
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API access
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Plans
Professional (Subscription) $139/yrEnterprise (Subscription) $399/yrProfessional (Lifetime) $279Enterprise (Lifetime) $799
Free FreeStarter $69.99/yrPro $119.99/yr
Basic FreePlus $10/moMax $20/mo
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Capabilities input → output
Input
Text
TextCode
CodeTextImagesDocuments
TextData
Output
Data
ImagesCode
ImagesCode
DataSlidesImages
Skill level
Intermediate
Intermediate
Beginner-friendly
Beginner-friendly
Categories
Productivity & OfficeAI Diagram Generator
Productivity & OfficeAI Diagram Generator
Productivity & OfficeAI Diagram Generator
Design & CreativeProductivity & OfficeAI ChartingAI Diagram Generator+3 more
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
1
3
2
7
Diagrams
Flowcharts
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Diagram assistance
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Infographics
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Mind maps
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Charts
–
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Data charts
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Presentations
–
–
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
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▲ 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.