Langflow

A visual Python framework for building agent and retrieval augmented generation apps, where components are dropped onto a canvas and connected by typed data flows. It ships templates for common patterns, exposes the graph as an API endpoint or an interactive playground, and since every node is plain Python you can drop into code when needed.

Developers and data teams use it to prototype multi-agent systems, RAG assistants and tool-using automations that later move into application code.

Hosting it yourself keeps the graph, its secrets and the data it touches inside your perimeter, there is no per-run billing, and an exported flow definition makes backup and restore a one-step operation.