The verdict
If the job is connecting apps, running loops, calling APIs or keeping data on your own servers, pick n8n. If the job is making sure a person follows the same steps every time and leaving a record, pick Process Street. They do not replace each other. A common pairing is Process Street for the human procedure and n8n for the data moves around it, since both offer an API and an MCP server. n8n has a free self-hosted edition, but someone has to look after hosting and updates. Process Street has no free plan, so budget for it from the start.