Lightpanda vs Viaduct

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

Lightpanda compared with Viaduct
Detail	Lightpanda	Viaduct
What it does	The AI-native web browser built from scratch for machines	Free C4 modeling tool with an MCP server for software teams to share architecture context with AI development tools
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	LT
Pricing model	Freemium	Freemium
Pricing	Explorer: Free with 10 browser hours per month and 5 concurrent sessions. Builder: $19/month with 300 browser hours per month and 30 concurrent sessions, then $0.08/hour. Enterprise: Custom volume pricing with dedicated support and SLA guarantees.	Browser: Free with account. Desktop: €10 a month after 7-day free trial, one licence covers 3 machines. Enterprise: custom pricing.
Key features	True headless without CSS, images, layout or GPU compositing Full JavaScript execution via V8 CDP-compatible with Playwright and Puppeteer Multi-client concurrent CDP connections in a single process Request interception to block, modify or mock HTTP requests Robots.txt compliance via obey_robots flag 9x faster execution than Chrome headless 16x less memory usage than Chrome headless Built in Zig for performance and efficiency Purpose-built for headless operation without rendering overhead	System context, container, component, and code diagrams Live collaboration on models MCP server for AI coding agents Change sets for scoped agent work Organization SSO JSON import and export OpenAPI contract export Desktop app for macOS, Windows, Linux AI assistant for model descriptions Installable PWA
What makes it different	Not a fork or patch of existing browsers but built completely from scratch Designed specifically for cloud environments rather than adapted from desktop browsers 10x faster execution and 10x less RAM than Chrome headless Isolated environments without persistent state for secure automation Open source under AGPL-3.0 license with production-ready 1.0 release	Model elements exist once and appear on every level they belong to Endpoints are real OpenAPI documents, not diagram labels Desktop app keeps all data local and offline-capable Free browser version with no paywall or feature limits AI agents read and write architecture through MCP
Community votes	0	0
DR (Domain Rating by Ahrefs)	46 +1 (up) since last check	20 no change since last check
Trust Flow (Majestic)	28	10
Citation Flow (Majestic)	36	28
Referring domains (Majestic)	784	74

5 details filled in for both companies.

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