OLBO 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.

OLBO compared with Mermaid Viewer
Detail	OLBO	Mermaid Viewer
What it does	Website development studio building fast, accessible and secure websites	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	UA	Not given
Pricing model	Not given	Freemium
Pricing	Business landing page from €690; Defence landing page from €1,390; Start website from €2,900; Online shop Basic from €3,900; Online shop Full from €6,500; Corporate website from €9,900; Platform from €24,900. Website Checker free score or full report €25. Website Monitoring from €15/month.	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	Website Checker: analyzes 13 indicators including hosting, security, age and health WCAG 2.1 AA accessibility included in all packages Admin panel for self-editing page content Online payments with Stripe or Mollie for shops Multi-language support from 2 to 3 languages Website redesign with SEO redirects Website Monitoring service tracking uptime and security 30-day warranty with free fixes Full code ownership and access provided to clients Security review for defence company websites	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	Built with AI assistance reviewed by humans; every decision and line of code is reviewed by a person Accessibility and security standards included in every package at no extra cost Fixed price and launch date guaranteed before contract signing Discounts for Ukrainian independent media and veteran-owned businesses	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)	2 +2 (up) since last check	6 +1 (up) since last check
Trust Flow (Majestic)	3	3
Citation Flow (Majestic)	17	23
Referring domains (Majestic)	5	12

4 details filled in for both companies.

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