Dify

Dify is an open-source LLM application development platform that positions itself as a leading agentic workflow builder, combining Backend-as-a-Service (BaaS) capabilities with LLMOps tooling in a single deployable stack. Rather than forcing teams to assemble brittle pipelines from disparate libraries, Dify provides a unified canvas where developers and non-technical builders alike can design AI applications—chatbots, copilots, multi-step agents, RAG systems, and document workflows—through a visual node-based editor that compiles to production-ready APIs.

The platform's architecture revolves around four pillars. First, a visual Workflow Studio lets users drag and connect nodes for LLM calls, knowledge retrieval, conditional branching, code execution, HTTP requests, and tool invocation, making complex orchestrations inspectable and debuggable. Second, a model-agnostic gateway supports hundreds of proprietary and open-source models—OpenAI, Anthropic Claude, Google Gemini, Mistral, Llama, Qwen, DeepSeek, and locally hosted models via Ollama, vLLM, or Xinference—so teams can swap providers without rewriting application logic. Third, a built-in RAG engine handles document ingestion, chunking, embedding, vector storage, hybrid retrieval, and reranking, eliminating the need to glue together separate vector databases and parsing services. Fourth, an agent framework with native tool use, function calling, and an extensible plugin marketplace enables autonomous task execution against APIs, databases, and SaaS systems.

Dify is distributed under a permissive open-source license and can be self-hosted via Docker Compose or Kubernetes for full data sovereignty, or consumed as a managed cloud service for teams that prefer not to operate infrastructure. Observability features—prompt versioning, response logging, annotation queues, and usage analytics—are built in, giving operators visibility into token spend, latency, and answer quality across deployments. The platform exposes every application as a REST API and ships with embeddable web chat widgets, making it straightforward to plug Dify-built agents into existing products, internal tools, or customer-facing channels. With tens of thousands of GitHub stars and adoption across enterprises and indie developers, Dify has become one of the most widely used open alternatives to closed LLM application platforms, particularly for teams that need a complete, opinionated stack without committing to a single model vendor.