n8n
n8n is an open-source workflow automation platform that competes directly with Zapier and Make at the technical operator tier — offering self-hosting, unlimited workflows, and a node-based visual builder with code execution capabilities. The company raised a €55M Series B led by Highland Europe in March 2025 and a Series C at a $2.5B valuation that October, validating the enterprise open-source automation category. n8n’s self-hostable architecture and code-alongside-UI design makes it the default choice for GTM engineers and RevOps operators who want Zapier’s ease with developer-grade control.