| What it does | Simple, sketch-style diagrams on your Mac
| Free online stamp maker for custom stamps and seals
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| Stage | Not given
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| Founded | Not given
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| Based in | AU
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| Pricing model | Freemium
| Freemium
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| Pricing | Desktop: one-time purchase via Mac App Store. Cloud (coming soon): Beginner $19/month (5 diagrams, 1 author seat, 10,000 updates/month), Pro $90/month (50 diagrams, 5 author seats, 500,000 updates/month), Enterprise $250/month (250 diagrams, 25 author seats, 5,000,000 updates/month). All Cloud plans
| Free: unlimited design edits and 480px watermarked JPG download. Paid: High-res PNG $2.50, PNG + SVG $2.90, All formats (PNG + SVG + PDF) $3.50. No subscription, one-time payment only.
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| Key features | - Hand-drawn sketch style for flowcharts and diagrams
- Free shape libraries for AWS, Google Cloud, networks, energy and more
- Offline-first desktop app with one-time purchase
- AI agent integration for automatic diagram generation
- AWS Networking & Content Delivery shapes (22 shapes)
- Google Cloud shape library (42 shapes)
- Energy shapes library (batteries, solar panels, power plants)
- 7-day free trial
| - 26 stamp template categories including company seals, notary, date, and deposit stamps
- Round, square, or rectangular stamp shapes sized in real millimeters
- Live preview rendering as you edit
- Free watermarked JPG download to test layout
- High-resolution PNG export at 6000px with transparent background
- Vector SVG export with text converted to outlines for stamp makers
- Print-ready PDF at true physical size
- Mobile-responsive web app with no installation required
- Customizable fonts including Oswald, Archivo, PT Serif, Courier Prime, and Noto Sans CJK
- Adjustable ink color, opacity, aging effect, and border styles
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| What makes it different | - Hand-drawn aesthetic that looks intentional, not generic
- Works offline with one-time purchase, no subscription required
- Free, open-source AI skills for automatic diagram generation
- Specialized shape libraries for cloud architecture, networks and domain-specific work
| - No account creation or signup required to design and download free preview
- Pay once per design, no subscription billing
- Server-side rendering ensures preview matches final export exactly
- Designed specifically for real documents with print-ready output at true size
- Seven-day email download link for file re-downloads after payment
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 31 ● no change since last check | 11 ● no change since last check |
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| Trust Flow (Majestic) | 14 | 6 |
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| Citation Flow (Majestic) | 33 | 22 |
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| Referring domains (Majestic) | 177 | 10 |
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SimpleDiagrams
StampZen