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Viaduct vs Archron

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 Archron
DetailViaduct logo ViaductArchron logo Archron
What it doesFree C4 modeling tool with an MCP server for software teams to share architecture context with AI development tools Execution governance engine for AI agents that verifies, governs, and audits every action before production data changes
StageNot given Startup
FoundedNot given Not given
Based inLT US
Pricing modelFreemium Paid
PricingBrowser: Free with account. Desktop: €10 a month after 7-day free trial, one licence covers 3 machines. Enterprise: custom pricing. Pilot Program: $999/month for one agent connected to one business system, unlimited users and unlimited operations. Organization-wide deployments available through contact with sales.
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
  • MCP server and HTTP API integrations
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
  • No bypass path: every agent action passes through the same verification gates regardless of agent or system
  • Agents act only with the permissions of the user they work for via per-user OAuth
  • Governance infrastructure not a data store: no migration required, business data stays in existing systems
  • Forced clarification loop prevents agent hallucinations before writes commit
Community votes00
DR (Domain Rating by Ahrefs)3 +1 (up) since last checkNot checked yet no change since last check
Trust Flow (Majestic)100
Citation Flow (Majestic)2817
Referring domains (Majestic)7432

6 details filled in for both companies.

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