Mermaid Viewer vs Certificate Maker

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

Mermaid Viewer compared with Certificate Maker
Detail	Mermaid Viewer	Certificate Maker
What it does	Free online Mermaid diagram viewer and editor with live preview, AI generation, and exports	AI-powered professional certificate design in minutes
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Freemium
Pricing	Free: unlimited editor and preview, 3 saved diagrams, 5 AI uses total, PNG export 1× with watermark. Starter: $6.99/month or $69.90/year; 30 saved diagrams, 500 AI conversations per month, PNG export up to 4× without watermark. Pro: $11.99/month or $119.90/year; unlimited diagrams, unlimited AI, PNG	Basic: $9.50/month (billed $114.00 yearly, 2400 credits/year), Pro: $19.50/month (billed $234.00 yearly, 12000 credits/year), Max: $49.50/month (billed $594.00 yearly, 36000 credits/year). One-time credit packs also available. Free starter credits with no credit card required.
Key features	Live preview of Mermaid code as you type AI diagram generator, editor and syntax fixer PNG export on every plan; JPG, SVG and PDF on Pro All 22+ Mermaid diagram types supported Share diagrams via public links and embeds Save diagrams to cloud with folders and version history Keyboard shortcuts and autocomplete Mobile-responsive editor with pan and pinch-zoom	AI-powered certificate design from text descriptions Logo and branding customization Bulk certificate generation for multiple recipients High-resolution print-ready exports Multiple certificate format templates Customizable colors, fonts, borders and layouts Professional serif and sans-serif typography Multiple aspect ratios and export formats Iterative refinement and customization
What makes it different	No account or sign-up required to start editing diagrams Affordable pricing: Starter at $6.99/month, Pro at $11.99/month Diagrams render in your browser; nothing stored unless you choose to save Fast editor with instant rendering and clear error messages	No design skills required—describe your needs in plain language Generates professional certificates in under 30 seconds AI-powered batch production for high-volume needs Maintains consistent branding across all certificates automatically Commercial usage rights included with paid plans
Community votes	0	0
DR (Domain Rating by Ahrefs)	6 +1 (up) since last check	20 −1 (down) since last check
Trust Flow (Majestic)	3	2
Citation Flow (Majestic)	23	12
Referring domains (Majestic)	12	21

5 details filled in for both companies.

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