Viaduct vs Nightshift Watchdog

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 Nightshift Watchdog
Detail	Viaduct	Nightshift Watchdog
What it does	Free C4 modeling tool with an MCP server for software teams to share architecture context with AI development tools	Dead-man's switch for AI agents and automations
Stage	Not given	Not given
Founded	Not given	Not given
Based in	LT	US
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: 3 monitors, email alerts. Pro: $12/month with 25 monitors, Slack, Discord, Telegram alerts, and spend limits. Team: $39/month with 100 monitors, up to 10 people, same alerts and spend limits.
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	Monitors AI agents, n8n flows, Make scenarios, Zapier zaps, Claude Code hooks, GitHub Actions, and Vercel crons Email alerts for silence and recovery on all plans Slack, Discord, and Telegram alerts on Pro and Team plans Runaway loop detection with spend limits 14-day ping history and charts Checks for missed pings every minute Grace period configuration Explicit failure pinging Encrypted webhook URLs and bot tokens Workspace collaboration on Team plan
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	Hosted service with no installation or scheduler setup required Alerts within about a minute of job failure Detects silent failures that don't throw errors Spending caps and baseline anomaly detection Built specifically for unattended overnight jobs and AI automations
Community votes	0	0
DR (Domain Rating by Ahrefs)	20 no change 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

6 details filled in for both companies.

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