Hairline UI 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.

Hairline UI compared with Mermaid Viewer
Detail	Hairline UI	Mermaid Viewer
What it does	Next.js landing page templates and free shadcn/ui components	Free online Mermaid diagram viewer and editor with live preview, AI generation, and exports
Stage	Not given	Not given
Founded	Not given	Not given
Based in	IN	Not given
Pricing model	Not given	Freemium
Pricing	Free: 6 templates (Loupe, Relay, Tempo, Stillform, Fourteen, Index) with account. Single template: $39 one-time. All-access: $149 one-time for all 46 templates plus future releases.	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	158 free shadcn/ui components Motion-designed interactions MCP server integration for coding agents Single config file customization Commercial license included 46 templates covering AI, SaaS, agencies and fintech Tailwind CSS and TypeScript	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	Every template is a complete original site, not a color-swappable theme Components install with shadcn CLI and match your app's theme AI agents can install components via MCP server One-time payment with commercial license, no subscriptions 14-day money-back guarantee on all purchases	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)	8 +3 (up) since last check	6 +1 (up) since last check
Trust Flow (Majestic)	10	3
Citation Flow (Majestic)	22	23
Referring domains (Majestic)	5	12

4 details filled in for both companies.

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