Open-Source vs SaaS Automation: Total Cost of Ownership

"Self-host n8n, save $1000/mo on Zapier" sounds great until you do the real math. Here it is.

The TCO equation

Total cost = License + Infrastructure + Maintenance + Lost productivity from downtime

Example: 500K tasks/month

Zapier (SaaS): - License: $300/mo - Infra: $0 - Maintenance: 0 hrs - Downtime cost: ~$0 (Zapier handles SLA) - Total: $300/mo

n8n (self-hosted): - License: $0 (open source) - Infra: $50/mo (VPS + Postgres + monitoring) - Maintenance: 4 hrs/mo @ $100/hr loaded cost = $400/mo - Downtime cost: variable, but real - Total: $450/mo

At this scale, Zapier wins on TCO. The "free" of open source is offset by maintenance.

When self-host wins

• High volume (>1M tasks/mo): infra cost grows linearly but SaaS pricing accelerates
• Engineering team with capacity (maintenance is "free" if it's already in their domain)
• Compliance requires data residency in your VPC
• You need custom nodes/integrations the SaaS doesn't offer

When SaaS wins

• Small team, no DevOps capacity
• Workflows fit within standard integrations
• Reliability matters more than cost
• Pace of feature development matters (SaaS ships faster than your team can)

The honest pattern

Most companies overpay on Zapier for years before migrating. The crossover is usually around $500-1000/month in SaaS bills.

Below that, the maintenance tax of self-host doesn't pay back. Above that, the savings start to dominate.

Hybrid approach (what we recommend)

• Critical workflows on SaaS (reliability, supported)
• High-volume non-critical on self-hosted (cost-effective)
• One person's job to monitor both stacks

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