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Feature comparison of selected websites
	LlamaIndex The data framework for LLM apps.	LangChain The framework for LLM apps.	Chroma The open-source embedding database.
Rating	—	—	—
Pricing	Free	Free	Free
Open source
Category	Agent Frameworks	Agent Frameworks	RAG & Vector DBs
Key features	Best-in-class RAG pipelines 100+ data loaders Query engines and agents	Chains, agents, and tools Hundreds of integrations Python and JS	In-process or client/server Simple Python/JS API Metadata filtering
Pros	Purpose-built for RAG Clean data abstractions	Huge ecosystem and examples Covers the whole app surface	Zero-setup for prototypes Runs fully local
Cons	Narrower than LangChain outside RAG Still evolving	Abstractions can feel heavy Fast-moving API	Scale story younger than rivals Fewer enterprise features
	Visit llamaindex.ai	Visit langchain.com	Visit trychroma.com

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