n8n

n8n is a workflow automation tool that connects services through a visual node editor. A workflow is a graph: a trigger node starts it, and subsequent nodes call APIs, transform data, or branch on conditions. The product sits between two categories. It is more visual than writing an integration script, and more code-friendly than a consumer automation tool: nodes can include JavaScript expressions, and a code node can run arbitrary logic inside the workflow. That combination is what lets it handle a transformation that a purely visual builder cannot express. n8n is published as source and can be self-hosted, which matters for teams that need automation to run inside their own network. The hosted cloud is the commercial layer. The self-hosted deployment is the same core, so a workflow can move between them.