Dify

An open-source platform for building LLM-powered applications with a visual workflow editor. Dify provides RAG pipelines, agent frameworks, and model management — enabling teams to go from prototype to production AI application without building infrastructure from scratch.

• Visual workflow — drag-and-drop interface for designing LLM application logic • RAG engine — built-in document indexing and retrieval for knowledge-base applications • Agent framework — create AI agents with tool use and multi-step reasoning • Model management — switch between OpenAI, Anthropic, local models, and more • Prompt engineering — iterative prompt design with version control and A/B testing • API & embed — deploy as API endpoints or embeddable chat widgets

Open-source and free to self-host. Cloud plans start at $59/mo.