Viaduct vs Plimbo

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 Plimbo
Detail	Viaduct	Plimbo
What it does	Free C4 modeling tool with an MCP server for software teams to share architecture context with AI development tools	Vibe code. Break nothing.
Stage	Not given	Not given
Founded	Not given	Not given
Based in	LT	Not given
Pricing model	Freemium	Freemium
Pricing	Browser: Free with account. Desktop: €10 a month after 7-day free trial, one licence covers 3 machines. Enterprise: custom pricing.	Free: $0, 300 AI checks a month. Pro: $7.99 a month or $72 a year, 1,000 AI checks a day.
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	Prompt expansion with project context Shows files that will be touched Protected areas flagging Detects unasked-for edits Customizable rules file Secret redaction before sending to AI Up to 3 computers on Pro
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	Rules travel with every prompt Flags unintended changes before they happen Minimal AI checks needed
Community votes	0	0
DR (Domain Rating by Ahrefs)	3 +1 (up) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	10	0
Citation Flow (Majestic)	28	0
Referring domains (Majestic)	74	0

5 details filled in for both companies.

More alternatives to Viaduct More alternatives to Plimbo