LangChain vs LlamaIndex
A side-by-side comparison of LangChain and LlamaIndex — pricing, features, integrations, and which one is right for your business.
Quick take
Both are dev tools tools that target similar use cases. Pricing: LangChain starts at Free (open source), LlamaIndex starts at Free (open source).
LangChain
Dev Tools
Framework for building LLM-powered applications with chains, agents, and memory. Python and JS.
PricingFree (open source)
PlanPaid LangSmith
Founded2022
Works with
PythonJavaScript
Best for
developers
Visit LangChain →
LlamaIndex
Dev Tools
Data framework for building LLM applications with RAG, structured data, and agents.
PricingFree (open source)
PlanPaid cloud
Founded2022
Works with
PythonTypeScript
Best for
developers
Visit LlamaIndex →