Mermaid Viewer vs ERBuilder vs CodeViz vs Whimsical

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

Your tool
Mermaid Viewer
vs
Competitor 1
ERBuilder
Competitor 2
CodeViz
Competitor 3
Whimsical
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 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 CodeViz
codeviz.ai
The free tier caps you at five diagrams monthly and one repository
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Competitor Whimsical
whimsical.com
Whimsical is a whiteboard for product builders that combines diagrams, flowcharts, mind maps, wireframes and documents on an infinite canvas.
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Traffic estimated monthly website traffic
Monthly visits
143.2Kvisits/mo
5.4Kvisits/mo
3.4Kvisits/mo
—
MoM change
▼ 10.9%
▼ 6.3%
▼ 44.8%
—
6-month growth
-9.3%
-22.4%
+35.5%
—
Global rank web
#317,277
#3,419,998
#4,939,424
—
Avg. last 3 months
163.4K
5.9K
4.1K
—
Bounce rate lower is better
45%
39%
35%
—
Pages / visit
1.8
1.9
1.8
—
Visit duration
19s
15s
16s
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Traffic sources
● Direct 81% · ● Referral 19%
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—
—
Mermaid ViewerERBuilderCodeVizWhimsical
046.6K93.1K139.7K186.3KMermaid Viewer · 158.9KMermaid Viewer · 157.9KMermaid Viewer · 184.8KMermaid Viewer · 170.5KMermaid Viewer · 186.3KMermaid Viewer · 160.7KMermaid Viewer · 143.2KERBuilder · 10.9KERBuilder · 12.8KERBuilder · 16KERBuilder · 7KERBuilder · 8.8KERBuilder · 8.8KERBuilder · 6.4KERBuilder · 5.8KERBuilder · 5.4KCodeViz · 4.2KCodeViz · 6.4KCodeViz · 2.7KCodeViz · 2.5KCodeViz · 6.3KCodeViz · 3.3KCodeViz · 2.5KCodeViz · 6.2KCodeViz · 3.4K1K10K100K1MMermaid Viewer · 158.9KMermaid Viewer · 157.9KMermaid Viewer · 184.8KMermaid Viewer · 170.5KMermaid Viewer · 186.3KMermaid Viewer · 160.7KMermaid Viewer · 143.2KERBuilder · 10.9KERBuilder · 12.8KERBuilder · 16KERBuilder · 7KERBuilder · 8.8KERBuilder · 8.8KERBuilder · 6.4KERBuilder · 5.8KERBuilder · 5.4KCodeViz · 4.2KCodeViz · 6.4KCodeViz · 2.7KCodeViz · 2.5KCodeViz · 6.3KCodeViz · 3.3KCodeViz · 2.5KCodeViz · 6.2KCodeViz · 3.4KNov '25DecJan '26FebMarAprMayJunJul
Pricing
Model
Freemium
Free Trial
Freemium
Freemium
Starting price
$69.99per month · free tier available
$139per month
$19per month · free tier available
$10per month · free tier available
Free tier
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Free trial
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API access
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–
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Plans
Free FreeStarter $69.99/yrPro $119.99/yr
Professional (Subscription) $139/yrEnterprise (Subscription) $399/yrProfessional (Lifetime) $279Enterprise (Lifetime) $799
Free FreePro $19/moTeams $50/moCustom $0
Free FreePro $10/moBusiness $20/mo
Capabilities input → output
Input
CodeText
Text
CodeText
ImagesText
Output
CodeImages
Data
Images
Images
Skill level
Intermediate
Intermediate
Intermediate
Beginner-friendly
Categories
Productivity & OfficeAI Diagram Generator
Productivity & OfficeAI Diagram Generator
Development & CodeProductivity & OfficeAI Developer ToolsAI Diagram Generator
Design & CreativeProductivity & OfficeAI Diagram GeneratorAI Mind Mapping+1 more
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
3
1
4
3
Diagrams
Diagram assistance
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Code diagramming
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–
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Architectural diagramming
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–
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Flowcharts
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–
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Mind maps
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–
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Code documentation
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–
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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.