Viaduct vs AC Bridge

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 AC Bridge
Detail	Viaduct	AC Bridge
What it does	Free C4 modeling tool with an MCP server for software teams to share architecture context with AI development tools	Smart lights that show your Claude Code and Codex agent status at a glance
Stage	Not given	Not given
Founded	Not given	Not given
Based in	LT	GB
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.	AC Bridge Pro: £2.99/month with a 7-day free trial (no card required). The trial ends after 7 days; add a card before then to continue at £2.99/month, renewing monthly until cancelled. Without a card, the trial ends with no charge.
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	29 agent states mappable to custom scenes and effects 9 dynamic lighting effects including pulse, flash, strobe and candle 16 smart home brands supported directly on LAN Device control from agent tasks with pre-approved permissions Automatic device state restoration on session end 49 device commands including power, brightness, colour and scenes Local network operation with no cloud round trip required
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	Quiet status notifications via visual indicators instead of sounds Works with both Claude Code and Codex simultaneously All integrations and features included in one affordable price Agents can control smart devices as part of task execution Local device keys stay on your machine for privacy
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	4
Citation Flow (Majestic)	28	19
Referring domains (Majestic)	74	9

6 details filled in for both companies.

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