n8n

n8n is an open-source workflow automation platform that can be self-hosted for complete data control or used as a cloud service. It supports over 400 integrations and allows custom code nodes in JavaScript or Python when pre-built integrations are not enough. The AI features include native AI agent workflows, LLM tool integration, and the ability to build custom AI applications using a visual builder. n8n has become popular for building AI agent workflows that chain together LLM calls, data retrieval, and actions. The self-hosted version is completely free with no feature limitations, making it the go-to choice for teams that need automation without sending data to third-party services. The cloud version starts at $20/mo and removes the operational overhead of self-hosting. n8n requires more technical comfort than Zapier or Make but offers significantly more flexibility.