n8n

Founded in 2019 by Jan Oberhauser, n8n (pronounced 'n-eight-n', short for 'nodemation') is a source-available, self-hostable, and highly extensible workflow automation tool. The platform features a visual node-based editor where each node represents a step in your workflow - fetch data, transform it, send it somewhere, or trigger an action. With over 96,000 GitHub stars, n8n has become one of the world's most popular automation tools, adopted by companies including Microsoft and Twilio. Unlike closed systems, n8n gives teams full control over their data, backend logic, and deployments with transparent, vendor-free architecture.