LangChain review
Framework for building LLM apps
4.6
Open Source— usersOpen Source
67
ToolHund Score
Solid
Verified
Our verdict
LangChain is the open-source framework for composing LLM apps: retrieval, tools, memory, agents — plus LangSmith for observability.
ToolHund Score: 67/100 · Best for: Developers building RAG, agents and tool-using LLM apps in Python or JS.
Strengths
- Open source
- Self-hostable
- Developer control
Weaknesses
- Requires setup
- Can be complex for beginners
- Needs careful permissions
Pricing
Open source · Cloud plans on request
Strong for technical teams — no license fees, you pay for infra and model usage
Features
- Python & JS SDKs
- Chains & tools
- Integrations
- LangSmith tracing