n8n is an open-source workflow automation platform from Germany that lets teams connect 500+ services — GitHub, Slack, Google Sheets, OpenAI, and more — through a no-code/low-code visual editor. It can be self-hosted, offers deep customization, and competes with Zapier and Make on cost and flexibility. This guide covers how n8n works, AI agent features, pricing, and how it differs from Zapier.