| What it does | Free online stamp maker for custom stamps and seals
| Think-cell-style charts and AI for Google Workspace
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
| DK
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| Pricing model | Freemium
| Freemium
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| Pricing | 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.
| Free: €0, 10 charts per month. Pro: €10/month (billed monthly) or €80/year. Enterprise: custom pricing per seat.
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| Key features | - 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
| - Waterfall, Mekko, Gantt, and other advanced chart types
- Charts linked to Google Sheets that auto-update
- AI Chat and writing pill using your own Claude or ChatGPT
- Claude connector to insert charts from claude.ai
- Deck checks for off-brand colors, wrong fonts, and conflicting numbers
- Chart annotations including Delta, CAGR, level line, and axis break
- Team palette and shared layouts for brand consistency
- Slide library with approved slides searchable across team
- Desktop app for Mac and Windows to build charts and export as PNG
- Align, arrange, and distribute tools for slide layout
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| What makes it different | - 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
| - Think-cell-style charts in Google Slides—the only tool to bring advanced charting to Slides
- Runs on your own Claude or ChatGPT, adding no model bill
- Colleagues see charts without needing ChartKit installed
- Numbers on slides stay linked to Sheets and refresh automatically
- Data is never trained on; only decks you open are accessed
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 11 ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 6 | 3 |
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| Citation Flow (Majestic) | 22 | 10 |
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| Referring domains (Majestic) | 10 | 3 |
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StampZen
ChartKit