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LlamaIndex

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RAG-focused great for data apps

Free (OSS)FrameworksLast verified: 2025-01-11

Overview

LlamaIndex (formerly GPT Index) specializes in connecting LLMs to your data. It excels at retrieval-augmented generation with sophisticated indexing and query strategies. If your primary use case is building a chatbot over documents or data, LlamaIndex is often the better choice over LangChain.

Works with

PythonTypeScriptAll major LLMsMany data sources

Pricing

MOST POPULAR
FreeOpen Source
  • Full framework
  • Community support
  • Good docs
PaidLlamaCloud
  • Managed parsing
  • Hosted indexes
  • Enterprise support

Pros

  • +Best for RAG
  • +Clean abstractions
  • +Good data connectors
  • +Less bloated than LangChain

Cons

  • -Narrower scope
  • -Smaller community
  • -Less general-purpose

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