7 Best LangChain-Chatchat Alternatives (Self-Hosted)

LangChain-Chatchat (formerly LangChain-ChatGLM) is an open-source RAG and Agent application that enables you to chat with your local knowledge base using popular LLMs like ChatGLM, Qwen, and Llama. Built on LangChain, it provides a complete solution for document ingestion, vector storage, retrieval-augmented generation, and multi-agent conversations. With 38k+ GitHub stars, it supports multiple LLM backends, multiple embedding models, and features a polished WebUI for easy interaction. Perfect for enterprises and individuals wanting a fully private, self-hosted document Q&A system.