LangChain vs LlamaIndex
Head-to-head adoption data comparison based on real metrics
Data updated daily — latest collection:
VS
🦜
LangChain
Framework
Monthly Downloads
9.0M
Total: 9.0M
GitHub Stars
136,881
Forks
22,640
Open Issues
586
Description
Framework for building applications powered by large language models
🦙
LlamaIndex
Framework
Monthly Downloads
492.2K
Total: 492.2K
GitHub Stars
44,083
Forks
6,336
Open Issues
270
Description
Data framework for LLM applications with RAG and agents
Side-by-Side Metrics
| Metric | LangChain | LlamaIndex |
|---|---|---|
| Monthly Downloads | 9.0M Leader | 492.2K |
| GitHub Stars | 136,881 Leader | 44,083 |
| GitHub Forks | 22,640 Leader | 6,336 |
| Open Issues | 586 Leader | 270 |
| Community Mentions | 0 | 0 |
Summary
LangChain leads in downloads with 18x more monthly downloads than LlamaIndex, while LangChain leads in community popularity with 211% more GitHub stars than LlamaIndex.
About This Data
This comparison uses real adoption metrics collected daily from NPM, PyPI, GitHub, benchmark leaderboards, and pricing data sources. Download counts reflect cumulative totals and weekly/monthly snapshots from the most recent scraper run. All data is publicly verifiable.
Latest data collection: (scrapers run daily)
Sources: NPM Registry API, PyPI API, GitHub API, SWE-bench, Official Pricing Pages