Viaduct vs Anvil AI

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

Viaduct compared with Anvil AI
Detail	Viaduct	Anvil AI
What it does	Free C4 modeling tool with an MCP server for software teams to share architecture context with AI development tools	Sovereign AI systems for government and defense contractors
Stage	Not given	Not given
Founded	Not given	Not given
Based in	LT	Not given
Pricing model	Freemium	Not given
Pricing	Browser: Free with account. Desktop: €10 a month after 7-day free trial, one licence covers 3 machines. Enterprise: custom pricing.	Not given
Key features	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	Local processing on customer hardware Offline functionality Access controls and permissions Records connection and integration Evidence tracing to source documents Rework detection Quote preparation
What makes it different	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	Runs entirely on customer-controlled hardware with no data leaving the site Works offline without requiring internet connection Traceable answers with evidence linked to original records Designed specifically for government and defense contractors
Community votes	0	0
DR (Domain Rating by Ahrefs)	20 no change since last check	2 no change since last check
Trust Flow (Majestic)	10	1
Citation Flow (Majestic)	28	19
Referring domains (Majestic)	74	13

3 details filled in for both companies.

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