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RAG Infrastructure & Retrieval · Vendor file

LlamaIndex

llamaindex.ai

Open-source data framework for building RAG applications with advanced retrieval and indexing

Categories LlamaIndex serves

The B4 Index places LlamaIndex in one category. Each category page lays out the build-versus-buy considerations for that decision.

RAG Infrastructure & Retrieval Primary Open-source (MIT). LlamaCloud managed service available.
The B4 Index scores every software category on two axes, strategic differentiation and AI feasibility, to classify it Build, Buy, Bridge, or Beware. Vendor facts here are independent of that call. See the full methodology.