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Langchain-Chatchat

Open Source
LLM Applications Updated Feb 15, 2026
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Compared with 39 other LLM Applications agents Open source Self-hostable Updated Feb 2026
💰 Open Source 🔄 Updated Feb 2026 🖥️ Self-hostable

💰 Pricing

Open Source

Pricing not publicly listed.

🎯 Use Cases

Local deployment of LLMs for private data QA Domain-specific knowledge retrieval without cloud dependencies Customizable AI-driven chat applications Research and experimentation with local LLM workflows

⚖️ Pros & Cons

✅ Pros

  • Open-source and self-hostable for full control
  • Supports local knowledge integration
  • Avoids cloud API costs and privacy concerns

❌ Cons

  • Requires technical expertise to deploy and maintain
  • Performance limited by local hardware
  • Lacks managed scalability compared to cloud solutions

Overview

Langchain-Chatchat is an open-source LLM application that enables local knowledge-based question-answering using models like ChatGLM, integrated with Langchain for enhanced functionality. It allows users to deploy and interact with AI models locally, focusing on domain-specific knowledge retrieval.

Problem It Solves

It provides a locally deployable solution for knowledge-based QA, avoiding reliance on cloud-based APIs and enabling offline or private data processing.

Target Audience: Developers and teams working with llm applications automation.

Inputs

  • • User configuration
  • • API credentials (if required)
  • • Task parameters

Outputs

  • • Automated task results
  • • Status reports
  • • Generated content or actions

Example Workflow

  1. 1 User configures the agent with required parameters
  2. 2 Agent receives input data or trigger
  3. 3 Agent processes the request using its core logic
  4. 4 Agent interacts with external services if needed
  5. 5 Results are returned to the user

Sample System Prompt 


              You are Langchain-Chatchat, an AI assistant. Help the user accomplish their task efficiently.

Tools & Technologies

LLM APIs Python

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FAQs

Is this agent open-source?
Yes
Can this agent be self-hosted?
Yes
What skill level is required?
Intermediate

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