Langflow

Drag-and-drop builder where flows compile down to LangChain code.

Langflow is an open-source, visual low-code tool for building LLM-powered applications and agents by wiring components on a drag-and-drop canvas. It is Python-based, framework-agnostic, and lets users compose RAG pipelines, agents, and multi-step flows, then export or expose them as APIs. It includes a playground for interactive testing of flows.