Mermaid Viewer vs in the middle

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 in the middle
Detail	Mermaid Viewer	in the middle
What it does	Free online Mermaid diagram viewer and editor with live preview, AI generation, and exports	An app design studio that made Bulletin, an infinite canvas app for iPhone, iPad and Mac
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	SG
Pricing model	Freemium	Free
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	Bulletin is available as a free download. The Terms & Conditions reference a lifetime PRO purchase option, but specific pricing for PRO is not detailed on the pages.
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	Arrange photos, notes and links freely on an infinite canvas Pan and zoom between items Available on iPhone, iPad and Mac Free download
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	Infinite canvas design for flexible content organization Cross-platform support across Apple devices Free to use
Community votes	0	0
DR (Domain Rating by Ahrefs)	6 +1 (up) since last check	14 no change since last check
Trust Flow (Majestic)	3	0
Citation Flow (Majestic)	23	0
Referring domains (Majestic)	12	0

5 details filled in for both companies.

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