Langchain-Chatchat
Local knowledge-based QA app with Langchain support.
Pricing
Free tier
Flat rate
Adoption
↘CoolingLicense
Open Source
Data freshness
Aging · Jun 8, 2026Overview
What is Langchain-Chatchat?
Formerly known as langchain-ChatGLM, this tool provides a local environment for running language models like ChatGLM, enabling developers to build and deploy question-and-answer applications using Langchain.
Key differentiator
“Langchain-Chatchat stands out as a fully open-source, locally deployable solution for language model-based applications, offering developers complete control over their AI infrastructure without relying on cloud services.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
API requires Python-specific patterns, TypeScript SDK is community-maintained
v0.1 to v0.2 migration required rewriting chain definitions
Primary development and documentation focus on Python, limited official support for other languages
Local deployment can struggle with resource constraints when handling high volumes of concurrent requests
Fit analysis
Who is it for?
✓ Best for
Teams needing a local deployment solution for language model-based applications without cloud dependencies.
Developers working on projects that require privacy-preserving, offline-capable AI solutions.
✕ Not a fit for
Projects requiring real-time interaction with large-scale datasets hosted in the cloud.
Applications where low-latency responses are critical and local processing cannot meet performance requirements.
Cost structure
Pricing
Free Tier
Available
Open source — free to use
Starts at
$0
Model
Flat rate
Enterprise
None
Performance benchmarks
How Fast Is It?
Ecosystem
Relationships
Works well with
Next step
Get Started with Langchain-Chatchat
Step-by-step setup guide with code examples and common gotchas.