LangChain vs LlamaIndex
| Tagline | Framework for building apps and agents on top of LLMs | Connect LLMs and agents to your documents and data |
|---|---|---|
| Category | AI Agents | AI Agents |
| Pricing | Open Source | Open Source |
| Upvotes | 0 | 0 |
| Comments | 0 | 0 |
| Page views | 0 | 0 |
| Click-through to site | 0.0% | 0.0% |
| Readiness Score | 81/100 | 76/100 |
| Launched | Oct 5, 2026 | Oct 5, 2026 |
| Maker | — | — |
What is LangChain?
LangChain provides building blocks for LLM applications: model integrations, retrieval, tools and agent patterns, in Python and JavaScript.
What is LlamaIndex?
LlamaIndex is a data framework for building retrieval-augmented and agentic applications over your own documents, with parsing and indexing tools.
Not sold on either? See alternatives to LangChain or alternatives to LlamaIndex.
Verdict
LangChain leads on 1 of the measurable metrics above (votes, engagement, click-through and readiness). Choose LangChain if you want framework for building apps and agents on top of LLMs; choose LlamaIndex if you want connect LLMs and agents to your documents and data.
Is LangChain better than LlamaIndex?
On AskableHQ's community and engagement data, LangChain currently performs better, but the right choice depends on your use case.
Which is cheaper, LangChain or LlamaIndex?
LangChain is Open Source; LlamaIndex is Open Source. Check each website for current plans.