Developer decision Enterprise evaluation

LangChain vs LlamaIndex

Side-by-side comparison of LangChain and LlamaIndex across fit, pricing, docs, evidence gaps, and benchmarks.

Decision brief

Best overall

LangChain

Best combined signal across API availability, docs, adoption, reviews, and ecosystem proof.

Open-source option

LangChain

Start here when local control, inspectability, or self-hosting matters.

Decision notes

Adoption proof: LangChain

Reviews: No developer reviews yet

Repo stars: LangChain

Check before choosing

LangChain has no developer reviews yet.LlamaIndex has no developer reviews yet.LlamaIndex has no public adoption proof yet.

Evidence links

LangChain docs LangChain repo LlamaIndex docs LlamaIndex repo

Missing evidence and weekly return

LangChain: benchmark dataLlamaIndex: verified adoptionLlamaIndex: benchmark data

Save this comparison to watch rank movement, new alternatives, docs changes, examples, and benchmark updates.

Next stepBuild packet and draft write-up

Turn this LangChain vs LlamaIndex decision into something you can build from.

Most developers reading a head-to-head are picking what to ship this week. Take the LangChain vs LlamaIndex decision into a build packet with the setup steps for whichever one you choose, and draft a short write-up of how it went so the next person deciding this has something concrete to read.

Comparing LangChain vs LlamaIndex

LangChain docs LangChain GitHub LlamaIndex docs LlamaIndex GitHub

Build packet Draft proof page

Feature Comparison

LangChain

RAG Frameworks

Pricing: Open source
Open source: Yes
API: Available
Rating: No reviews
GitHub: 147,177 stars
Adoption: 6 adoptions
Benchmark: No benchmark data
Best for: Framework for composing agents, RAG workflows, retrieval, and tool calls.
Tradeoff: More control and inspectability, but more setup and operational ownership.

LlamaIndex

RAG Frameworks

Pricing: Open source
Open source: Yes
API: Available
Rating: No reviews
GitHub: 52,333 stars
Adoption: Public evidence pending
Benchmark: No benchmark data
Best for: Data framework for document ingestion, retrieval, and RAG over private data.
Tradeoff: More control and inspectability, but more setup and operational ownership.

Feature	LangChain	LlamaIndex
Category	RAG Frameworks	RAG Frameworks
Pricing	Open source	Open source
Open source
API available
Rating	No reviews	No reviews
GitHub stars	147,177	52,333
Adoption	6 adoptions	Public evidence pending
Benchmark	No benchmark data	No benchmark data
Best for	Framework for composing agents, RAG workflows, retrieval, and tool calls.	Data framework for document ingestion, retrieval, and RAG over private data.
Developer tradeoff	More control and inspectability, but more setup and operational ownership.	More control and inspectability, but more setup and operational ownership.

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Feature

LangChain

LlamaIndex