Space Designer 3D vs Mermaid Viewer

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

Space Designer 3D compared with Mermaid Viewer
Detail	Space Designer 3D	Mermaid Viewer
What it does	Online floor plan maker and 3D interior design tool	Free online Mermaid diagram viewer and editor with live preview, AI generation, and exports
Stage	Established	Not given
Founded	2009	Not given
Based in	FR	Not given
Pricing model	Freemium	Freemium
Pricing	Starter: Free (1 project, basic catalog, PNG/JPG/PDF exports, 10 credits/month). Premium: $25/month or yearly with 5-day free trial (200 credits/month, 25 projects, 2,500+ furniture items). Ultimate: $45/month or yearly with 5-day free trial (370 credits/month, unlimited projects, 4,500+ furniture i	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
Key features	2D floor plan drawing with walls, doors, windows and measurements Real-time 3D visualization from 2D drawings Thousands of real furniture items and materials Photorealistic rendering in HD, 4K and 8K AI-powered image enhancement and automatic lighting Multi-format export including PDF, DXF, PNG and JPG Room areas and dimensions automatically calculated Multi-level floor design with stairs and roofs Team collaboration and project sharing with roles	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
What makes it different	No installation required - runs entirely in your browser Used by 6 million+ people worldwide since 2010 Automatic 2D to 3D conversion keeping both in sync One-click photorealistic rendering with AI optimization Built by architects for professional and consumer use	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
Community votes	0	0
DR (Domain Rating by Ahrefs)	49 −1 (down) since last check	6 +1 (up) since last check
Trust Flow (Majestic)	13	3
Citation Flow (Majestic)	35	23
Referring domains (Majestic)	285	12

5 details filled in for both companies.

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