Dify
Build chatbots, RAG apps, and agent workflows on a visual canvas — without writing glue code. One of the most-starred open-source LLM platforms in production.
Overview
Dify is an open-source platform for building LLM applications — chatbots, RAG pipelines, and multi-step agents — with a visual workflow editor and a built-in observability layer. Where LangChain is a framework you code against, Dify gives you a visual canvas for wiring together models, retrieval, tools, and logic — with the option to drop into code when needed. Teams use it to build internal knowledge bases, customer-facing chatbots trained on their docs, and automated research pipelines without a dedicated ML engineer. The self-hosted version is free; the cloud version has a generous free tier. With 70,000+ GitHub stars it's one of the most adopted open-source LLM platforms in production today.
Key Features
- Visual workflow editor
- RAG pipeline builder
- Multi-model support
- Built-in observability
- API and webhook integration
- Self-hostable
- • Visual editor dramatically reduces development time
- • Strong open-source community and active development
- • Works with any major LLM provider
- • Complex workflows can become difficult to debug
- • Cloud pricing jumps significantly beyond free tier