n8n

n8n is a fair-code workflow automation platform that combines a visual, node-based canvas with the ability to drop into JavaScript or Python (and npm packages) when the built-in nodes aren't enough. It connects to 1,500+ third-party services and ships thousands of community workflow templates to start from rather than building automations from a blank canvas.

Its current focus is AI agent automation specifically: building multi-step AI workflows with tool use, human-approval steps, and observability, while staying model-agnostic (OpenAI, Anthropic, Google, or self-hosted/open models) so you can switch providers without redesigning the workflow.

n8n can be self-hosted (via Docker) or used through n8n's cloud offering. It's licensed under n8n's own Sustainable Use License plus a separate Enterprise License for additional features - the source is always visible and self-hostable, but this is not an OSI-approved open-source license, which is worth knowing if strict open-source licensing matters for your use case.