The choice between a workflow tool like n8n and a custom-coded service is rarely about capability. Both can move data and call APIs. It is about where the complexity is going to live a year from now.
When n8n wins
Reach for n8n when the logic is linear, the volume is modest, and the people maintaining it are closer to operations than engineering. You trade some control for speed and visibility, and that is often the right trade.
- Internal glue between a handful of SaaS tools
- Low to medium event volume
- Workflows a non-engineer should be able to read
When custom code wins
Once you need real branching logic, tight latency, heavy volume, or testable business rules, a custom service earns its keep. You own the failure modes instead of discovering them inside a node you cannot debug.
Pick the tool that makes next year cheaper, not just next week.
The honest middle ground
Most mature systems run both: n8n for the edges and orchestration, custom services for the core. Start with the workflow tool, and graduate the parts that hurt into code as they prove they matter.
