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ProofOkay vs Diagram Smith

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

ProofOkay compared with Diagram Smith
DetailProofOkay logo ProofOkayDiagram Smith logo Diagram Smith
What it doesProof approval software for anything that gets printed Free online tools for flowcharts, charts, diagrams and timelines with no sign-up
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelPaid Freemium
Pricing$49 per month USD for unlimited users and unlimited proofs. 7 days free to look around with no card, then 14 days free trial. Free: no account required, all diagram and chart makers, PNG/SVG/PDF export, no watermark. Pro: Monthly $9.99 a month, Yearly $99.99 a year with 7-day free trial, Lifetime $239.99 once. Euro area: €10.99 a month, €109.99 a year, €259.99 once (VAT included).
Key features
  • Zoomable native file preview for PDF, Illustrator, EPS, Photoshop, TIFF, JPEG and PNG
  • Automatic print check at final print size for file size, image sharpness, vector status, CMYK/RGB color, bleed and fonts
  • Three approval options: Approve, Approve with changes, or Request changes
  • File uploads up to 300 MB with resumable uploads
  • No customer account or login required
  • Automatic reminders on custom schedule
  • Version tracking with message threads per proof
  • Customizable approval boxes and email wording
  • Flowchart and process diagram maker with canvas and text-to-diagram modes
  • Text-to-diagram tools for UML, ER and sequence diagrams
  • Chart tools: pie chart, line graph, gauge and Sankey diagram
  • Automatic diagram layout from typed text
  • Export to PNG, SVG and PDF without watermark
  • Share diagrams with share links
  • Pro: editable .drawio export and vector PDF
  • Pro: multi-page documents and layers
  • Diagram checks for unlabelled branches and dead ends
  • Works on phone and computer
What makes it different
  • Customers zoom into native files and see fine print sharp instead of flattened JPEGs
  • Automatic print check at final print size catches issues before approval
  • One flat price for unlimited users and proofs instead of per-seat pricing
  • Made by the team behind PrinterFlo with upgrade path to full shop software
  • Completely free with no account required and no watermark on exports
  • Nothing uploaded: all work stays on your device in your browser
  • Results computed by the same tested code, not manually typed
  • Multiple export formats: PNG at 4 sizes, SVG and PDF
  • Converts between formats: Mermaid to draw.io, SQL to ER, Visio to flowchart
Community votes00
DR (Domain Rating by Ahrefs)4 −1 (down) since last check2 no change since last check
Trust Flow (Majestic)00
Citation Flow (Majestic)019
Referring domains (Majestic)04

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