Flowise

Open-source drag-and-drop LLM flow builder, 35k+ stars

Flowise is an open-source, drag-and-drop interface for building customized LLM applications and agentic pipelines. With 35k+ GitHub stars, it supports LangChain, LlamaIndex, and native LLM nodes — enabling teams to visually compose RAG pipelines, chatbots, and multi-agent systems. Flowise can be self-hosted and deployed as an embeddable chat widget or REST API.