Side-by-side comparison

LangChain vs LlamaIndex

A factual comparison generated from the two reviewed directory profiles. Follow the official links for current plan limits and product terms.

Signal	LangChain	LlamaIndex
Tagline	Open-source frameworks and a platform for building, evaluating, deploying, and observing AI agents.	A framework and managed platform for document ingestion, retrieval, workflows, and knowledge agents.
Category	Developer tools	Developer tools
Pricing	Freemium	Freemium
Platforms	Python, TypeScript, Web	Python, TypeScript, Web
Features	Open-source agent frameworks with provider integrations Tracing, evaluation, deployment, and monitoring through LangSmith	Document ingestion, indexing, and retrieval libraries Managed parsing and agent workflow services
Tags	API, Coding, Open source	API, Open source, Research
Community	0 votes · 0 saves	0 votes · 0 saves

Choose LangChain when

Open-source frameworks and a platform for building, evaluating, deploying, and observing AI agents.

LangChain provides open-source frameworks for building agents and LangSmith services for tracing, evaluation, deployment, and monitoring. Its ecosystem supports multiple model providers and SDKs for several programming languages.

Read the LangChain profile

Choose LlamaIndex when

A framework and managed platform for document ingestion, retrieval, workflows, and knowledge agents.

LlamaIndex supplies open-source libraries and managed services for connecting AI applications to documents and enterprise data. Its tools cover document parsing, indexing, retrieval, workflows, and agents that reason over private knowledge.

Read the LlamaIndex profile