The Short Answer
Zapier is better for simple, linear automations between popular SaaS tools — if you need to connect Typeform to Mailchimp with no code and no server, Zapier is fine.
n8n is better for complex, multi-step workflows, AI-powered automations, custom logic, and anything where you care about data privacy or cost at scale.
We use n8n for almost every client engagement. Here's why.
The Key Differences
Cost Model
Zapier charges per task execution — every step in a workflow counts. At any meaningful scale, this gets expensive fast. A workflow with 5 steps that runs 1,000 times per day costs 5,000 tasks per day, or ~150,000 tasks per month. On Zapier's Business plan, that can run to £600-800+/month.
n8n, when self-hosted, has no per-execution cost. You pay for the server (typically £20-50/month on a basic VPS). For high-volume automations, the cost difference is an order of magnitude.
Customisation
Zapier is deliberately constrained — you can only do what the pre-built connectors allow. This is a feature for simple use cases (less to think about), but a limitation for anything custom.
n8n gives you full control:
- Custom code nodes (JavaScript or Python) for any logic
- HTTP request nodes to connect any API, not just pre-built integrations
- Database connections (PostgreSQL, MySQL, MongoDB, etc.)
- File handling, data transformation, conditional logic
AI Integration
This is where n8n has pulled decisively ahead. n8n now has native AI nodes for:
- LLM calls (Claude, GPT-4.5, Gemini)
- Embeddings and vector store operations
- AI agents with tool use
- Memory and context management
Building AI-powered workflows in Zapier is painful — you're limited to basic API calls and the integrations are brittle. In n8n, you can build sophisticated multi-step AI pipelines visually.
Self-Hosting and Data Privacy
Zapier is SaaS only — your data passes through their servers. For clients in financial services, healthcare, or legal, this can be a compliance issue.
n8n can be self-hosted on your own infrastructure. Data stays in your environment. This matters for GDPR compliance and for workflows that handle sensitive documents or customer data.
When to Use Zapier
- You need to get something running in under an hour
- The automation is genuinely simple (A connects to B when X happens)
- You have no technical resources and don't want to manage a server
- You're in the exploration phase — testing whether an automation is worth building properly
When to Use n8n
- You're building something that will run thousands of times per month
- You need custom logic, code, or API calls to non-standard services
- You're building AI-powered workflows
- Data privacy matters (financial, healthcare, legal, or enterprise)
- You want to understand and own your automation infrastructure
How We Use n8n at Squirrel AI
Almost all of our client automations run on n8n. Here's a typical stack:
- n8n hosted on a dedicated VPS (usually DigitalOcean or Railway) — the workflow engine
- Claude or GPT-4.5 via API for any AI steps — classification, summarisation, generation
- PostgreSQL or Supabase for workflow data storage and logging
- Webhooks for triggering from external systems (Shopify, Stripe, CRMs)
The combination is powerful, reliable, and cheap at scale. A workflow that costs £500+/month on Zapier runs for £30-50/month on n8n.
The Build vs Buy Decision
One thing worth noting: the right answer isn't always one or the other. We often start clients on Zapier for simple automations while we build more complex n8n workflows in parallel. Zapier is fine for "when a new lead comes in, add them to the spreadsheet." n8n is better for "when a new lead comes in, research their company, score them against our criteria, draft a personalised email, and notify the sales rep if they score above 7/10."
Squirrel AI builds production-grade automations for PE firms, VC funds, and growth businesses. Book a discovery call to see what's possible.