Product
Langchain-Chatchat
Langchain-Chatchat is an open-source AI app, launched in 2023, made for developers.
A self-hosted knowledge-base Q&A app built on LangChain and open models, runnable offline.
Main jobs: Ask your documents, Knowledge base (RAG). It is open source and free to use. You can use it on your own server, offline on your own machine and through an API.
Markdown version of https://godooo.ai/en/product/langchain-chatchat. Every page on this site has one: add .md to its address.
At a glance
- Type
- Product
- Launched
- 2023
- Galaxy
- Agents & Automation
- Pricing
- Open source, free
- Open source
- Yes · Apache-2.0
- Source code
- github.com/chatchat-space/Langchain-Chatchat
- GitHub stars
- 38,666
- How you run it
- Self-host · Runs offline · API
- Made for
- Developers
- Website
- github.com
- Also known as
- Langchain-ChatGLM
What it can do
Ask your documentsmain jobunconfirmed
“文件对话 ✅仅向量检索 ✅统一为File RAG功能,支持BM25+KNN等多种检索方式”— github.com, 2026-09-24
Knowledge base (RAG)main jobunconfirmed
“基于本地知识库的问答应用，目标期望建立一套对中文场景与开源模型支持友好、可离线运行的知识库问答解决方案”— github.com, 2026-09-24
Chat and Q&Asupportedunconfirmed
Run models locallysupportedunconfirmed
“开源、可离线部署的 RAG 与 Agent 应用项目”— github.com, 2026-09-24
Web search with answerssupportedunconfirmed
unconfirmedproposed by a machine, awaiting calibration
Alternatives
- AnythingLLMOpen source, freeAlso does: Ask your documents, Knowledge base (RAG), Run models locally; no code needed
- KhojOpen source, freeAlso does: Ask your documents, Knowledge base (RAG), Chat and Q&A; no code needed
- Open WebUIOpen source, freeAlso does: Chat and Q&A, Ask your documents, Knowledge base (RAG); no code needed
- RAGFlowOpen source, freeAlso does: Ask your documents, Knowledge base (RAG)
- ChatboxOpen source, freeAlso does: Chat and Q&A, Ask your documents, Knowledge base (RAG); no code needed
- kotaemonOpen source, freeAlso does: Ask your documents, Knowledge base (RAG); no code needed
- PrivateGPTOpen source, freeAlso does: Ask your documents, Knowledge base (RAG)
- QAnythingOpen source, freeAlso does: Ask your documents, Knowledge base (RAG)
- NotebookLMFree plan + paid upgradesAlso does: Ask your documents, Knowledge base (RAG); no code needed
- LlamaIndexOpen source, freeAlso does: Knowledge base (RAG), Ask your documents
- GraphRAGOpen source, freeAlso does: Knowledge base (RAG), Ask your documents
- LightRAGOpen source, freeAlso does: Knowledge base (RAG), Ask your documents
Connections
- Built with
- LangChain
Questions
What is Langchain-Chatchat?
Langchain-Chatchat is an open-source AI app, launched in 2023, made for developers. A self-hosted knowledge-base Q&A app built on LangChain and open models, runnable offline.
Is Langchain-Chatchat free?
Yes. Langchain-Chatchat is open source (Apache-2.0) and free to use.
Is Langchain-Chatchat open source?
Yes, under the Apache-2.0 license. The source code is at https://github.com/chatchat-space/Langchain-Chatchat.
Can Langchain-Chatchat run locally?
Yes. Langchain-Chatchat can run offline on your own machine. It can also be self-hosted on your own server.
What can Langchain-Chatchat do?
Main jobs: Ask your documents, Knowledge base (RAG). It can also do: Chat and Q&A, Run models locally, Web search with answers.
What are open-source alternatives to Langchain-Chatchat?
Open-source ones: AnythingLLM, Khoj, Open WebUI, RAGFlow, Chatbox, kotaemon, PrivateGPT and QAnything. Others: NotebookLM.
Sources
- github.com/chatchat-space/Langchain-Chatchatchecked 2026-09-24