LangChain vs LlamaIndex
Evaluating general-purpose model chaining vs data-focused document indexing.
Tool 1
LangChain
Best For
General LLM logic pipelines, chains, and web app integrations.
Pricing Model
Open Source (MIT)
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Tool 2
LlamaIndex
Best For
Parsing files, building vector databases, and optimizing RAG retrieval.
Pricing Model
Open Source (MIT)
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Feature Comparison Matrix
| Feature Metric | LangChain | LlamaIndex |
|---|---|---|
| Core strength | LangChain: Integrations | LlamaIndex: Document indexers |
| Data connectors | LangChain: Basic | LlamaIndex: Vast (LlamaHub) |
Editorial Verdict
LlamaIndex for data ingestion and RAG; LangChain for agent tooling and API wrappers.