LangChain vs LlamaIndex

LangChain: Framework and platform for building LLM applications and agents. LlamaIndex: Framework for connecting data to language models and agents.

Pricing, free tier, and features on this page come from each tool's own site. Google autocomplete (suggestqueries.google.com, client=firefox, hl=en) for "<tool> vs", fetched 2026-10-14; a pair is kept when the suggestion appears from both sides (2+ hits). Sorted by how much you can use for free (free or open source first, then free plan with paid tiers, then paid only), then by the number of documented features, then alphabetically. No ratings or reviews are used. Read the comparison methodology. How benchmark evidence is labeled.

	LangChain	LlamaIndex
What it is	Framework and platform for building LLM applications and agents.	Framework for connecting data to language models and agents.
Category	Agents	Agents
Pricing	Freemium (free plan + paid tiers)	Freemium (free plan + paid tiers)
Free tier	Yes	Yes
Who it's for	For individual developers and teams of any size building agents.	Developers and document-heavy teams in finance, insurance, manufacturing, and healthcare.
Key features	Trace agent runs step by step and search traces fast	Parse PDFs, Office files, spreadsheets, and images
	Turn traces into datasets and score each agent step	Extract tables, charts, and handwritten text into structure
	Deploy agents with persistent state and isolated code sandboxes	Pull defined fields from documents without model training
	Build agents in code or natural language with any model	Classify documents and split them using plain-language rules
	Limit model spend and check calls for sensitive data	Chunk and embed files for search and retrieval
Website	www.langchain.com	www.llamaindex.ai

Data comes from each tool's homepage and pricing page. Pair chosen from search suggestions (langchain vs llamaindex; llamaindex vs langchain).