Arialine vs Mermaid Online

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

Arialine compared with Mermaid Online
Detail	Arialine	Mermaid Online
What it does	Create and maintain diagrams from Slack conversations, with version history and decision context	Free online Mermaid editor with live preview and watermark-free export to PNG, SVG, JPG, WebP, or PDF
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Freemium
Pricing	Free: $0 forever with up to 3 boards, 8 versions per board, and 10 AI generations per workspace daily. Team: $79 per workspace per month for unlimited boards, versions, and AI generations.	Free: PNG, SVG, JPG, WebP, and PDF export with no watermark, up to 4x scale, transparent backgrounds, 3 standard export themes, 10 free AI credits after sign-in, 3 saved cloud diagrams. Pro: $5.99/mo with 200 AI credits every month, unlimited cloud diagrams, all 7 premium theme exports. Credit packs
Key features	Create diagrams from plain language descriptions or pasted Mermaid code Full version history with source-linked changes Undo individual changes or rewind to earlier versions Branch into alternative versions without touching the original Markdown to Slack Canvas conversion with embedded diagrams Integration with Slack AI (Slackbot) via MCP server Mobile-friendly PNG exports for each diagram version React with 📌 to propose message changes	Syntax highlighting and error markers with autosave Live preview as you edit Export to PNG, SVG, JPG, WebP, and PDF Transparent background export for PNG and WebP 1x, 2x, and 4x resolution scaling AI diagram generation from text description AI syntax repair and code fixing 9 hand-tuned export themes including Editorial and Whiteboard styles Interactive system maps from diagrams Local browser rendering without uploading code
What makes it different	Decision history preserved with every diagram version, linked to source messages No syntax required; plain language AI generation or paste existing Mermaid code Works on any Slack plan including Free, with workspace-flat pricing for Team plan All diagram artifacts and history stay in Slack with no external tool switching Diagrams and decisions remain available on workspace downgrade from Team to Free	Fully free core editor and exports with no watermark, signup, or usage limits Local-first processing keeps your diagram code in your browser and never uploaded Hand-tuned professional export themes designed for documentation and slides Up to 4x resolution export for sharp, publication-ready diagrams Optional AI features with low per-use credit costs rather than forced subscription
Community votes	0	0
DR (Domain Rating by Ahrefs)	5 −1 (down) since last check	2 no change since last check
Trust Flow (Majestic)	18	4
Citation Flow (Majestic)	19	25
Referring domains (Majestic)	24	13

5 details filled in for both companies.

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