Mermaid Viewer vs DecorlyAI

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 DecorlyAI
Detail	Mermaid Viewer	DecorlyAI
What it does	Free online Mermaid diagram viewer and editor with live preview, AI generation, and exports	AI interior design that transforms room photos into photorealistic redesigns with shoppable furniture
Stage	Not given	Startup
Founded	Not given	2025
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	Free first design per month. Intro Pack: $0.99 (7 credits, one-time). Credit Pack: $7 (30 credits, one-time). Monthly: $21/month (120 credits/month). À la carte: $0.59/credit (or $0.39/credit for subscribers). Room scan costs 1–2 credits, design costs 3 credits, Ultra 4K design costs 10 credits.
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	Photorealistic redesigns from room photos 128+ interior design styles Room dimension measurement from photos Real furniture filtering and matching Virtual staging for empty rooms Support for 8 room types Design generation in 1-3 minutes Web and mobile app access Live pricing on furniture items
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	Redesigns measured to fit your actual room dimensions Works with imperfect real-world photos No subscription required, pay-as-you-go
Community votes	0	0
DR (Domain Rating by Ahrefs)	8 +1 (up) since last check	3 no change since last check
Trust Flow (Majestic)	3	1
Citation Flow (Majestic)	23	19
Referring domains (Majestic)	12	14

5 details filled in for both companies.

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