Napkin vs ERBuilder vs Eraser vs ConceptViz

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

Your tool
Napkin
vs
Competitor 1
ERBuilder
Competitor 2
Eraser
Competitor 3
ConceptViz
Compare
4 tools · best value per row highlighted
Your tool 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 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 Eraser
eraser.io
Eraser is an AI diagramming tool for technical and process teams that generates diagrams from text prompts, code, or uploaded files.
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Competitor ConceptViz
conceptviz.app
A high school biology teacher needs to explain cellular respiration on Monday morning
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Traffic estimated monthly website traffic
Monthly visits
1.3Mvisits/mo
5.4Kvisits/mo
—
105.1Kvisits/mo
MoM change
▼ 8.5%
▼ 6.3%
—
▼ 21.0%
6-month growth
-46.4%
-22.4%
—
+127.9%
Global rank web
#36,124
#3,419,998
—
#330,590
Avg. last 3 months
1.4M
5.9K
—
117.4K
Bounce rate lower is better
41%
39%
—
47%
Pages / visit
3.9
1.9
—
1.9
Visit duration
2m 36s
15s
—
46s
Traffic sources
● Direct 86% · ● Referral 9%
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—
● Direct 72% · ● Referral 26%
NapkinERBuilderEraserConceptViz
0831.2K1.7M2.5M3.3MNapkin · 3.3MNapkin · 2.7MNapkin · 2.4MNapkin · 2.3MNapkin · 2.4MNapkin · 2.1MNapkin · 1.8MNapkin · 1.6MNapkin · 1.4MNapkin · 1.3MERBuilder · 10.9KERBuilder · 12.8KERBuilder · 16KERBuilder · 7KERBuilder · 8.8KERBuilder · 8.8KERBuilder · 6.4KERBuilder · 5.8KERBuilder · 5.4KConceptViz · 688ConceptViz · 3.8KConceptViz · 9.3KConceptViz · 46.1KConceptViz · 89.6KConceptViz · 101.8KConceptViz · 114.2KConceptViz · 132.9KConceptViz · 105.1K1001K10K100K1M10MNapkin · 3.3MNapkin · 2.7MNapkin · 2.4MNapkin · 2.3MNapkin · 2.4MNapkin · 2.1MNapkin · 1.8MNapkin · 1.6MNapkin · 1.4MNapkin · 1.3MERBuilder · 10.9KERBuilder · 12.8KERBuilder · 16KERBuilder · 7KERBuilder · 8.8KERBuilder · 8.8KERBuilder · 6.4KERBuilder · 5.8KERBuilder · 5.4KConceptViz · 688ConceptViz · 3.8KConceptViz · 9.3KConceptViz · 46.1KConceptViz · 89.6KConceptViz · 101.8KConceptViz · 114.2KConceptViz · 132.9KConceptViz · 105.1KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Free Trial
Freemium
Freemium
Starting price
$9per month · free tier available
$139per month
$15per month · free tier available
$10per month · free tier available
Free tier
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Free trial
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–
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API access
–
–
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Plans
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Professional (Subscription) $139/yrEnterprise (Subscription) $399/yrProfessional (Lifetime) $279Enterprise (Lifetime) $799
Free FreeStarter $15/moBusiness $45/moEnterprise Custom
Free FreeStandard Plan $10/moPro Plan $20/moLifetime Deal $229/one-time
Capabilities input → output
Input
DataText
Text
CodeDocumentsImagesText
DocumentsText
Output
DataImagesSlides
Data
Images
Images
Skill level
Beginner-friendly
Intermediate
Intermediate
Intermediate
Categories
Design & CreativeProductivity & OfficeAI ChartingAI Diagram Generator+3 more
Productivity & OfficeAI Diagram Generator
Productivity & OfficeAI Diagram Generator
Design & CreativeImage GenerationProductivity & OfficeAI Charting+3 more
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
7
5
10
8
Diagrams
Diagram assistance
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Flowcharts
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Infographics
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Data charts
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Data modeling
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Illustration creation
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Illustrations
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Mind maps
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Architectural diagramming
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Charts
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Code diagramming
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Database design
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Image generation
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4K image generation
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BPMN
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BPMN diagrams
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Cloud diagrams
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Network diagrams
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Presentations
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Schema generation
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UML diagrams
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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.