LangFlow

LangFlow is the open-source, Python-based visual studio for developers: build, orchestrate, and deploy AI agents and RAG workflows with drag-and-drop efficiency.

LangFlow delivers rapid AI application development via its visual, low-code editor. This customizable, open-source platform (Python under the hood) allows you to connect component nodes—like LLMs, vector stores, and custom tools—into functional 'flows.' For example, you can prototype a complex RAG system (Retrieval-Augmented Generation) in minutes: simply drag, drop, and configure components for a chat input, an embedding model, a vector database, and a final LLM response. Every completed flow is immediately deployable as an API endpoint, giving you full programmatic control and fast iteration for production-ready applications.

https://langflow.org