LangChain vs LlamaIndex
Side-by-side comparison of two AI agent tools
Short answer
- LangChain is growing faster: +23,097 GitHub stars in the last 30 days vs +683 for LlamaIndex.
- Pick LangChain for: the agent engineering platform. Pick LlamaIndex for: llamaIndex is the leading document agent and OCR platform.
From GitHub data refreshed daily.
LangChainopen-source
The agent engineering platform
LlamaIndexopen-source
LlamaIndex is the leading document agent and OCR platform
Metrics
| LangChain | LlamaIndex | |
|---|---|---|
| Stars | 147.4k | 52.4k |
| Star velocity /mo | 23.1k | 683.3684210526317 |
| Commits (90d) | 542 | 98 |
| Releases (6m) | 10 | 5 |
| Downloads (30d, npm + PyPI) | 169.4M | 3.1M |
| Overall score | 0.8918400192125109 | 0.7096022857980566 |
Pros
- +Extensive ecosystem with seamless integration between LangGraph, LangSmith, and hundreds of third-party components
- +Future-proof architecture that adapts to evolving LLM technologies without requiring application rewrites
- +Strong community support with 131k+ GitHub stars and comprehensive documentation for both Python and JavaScript
- +社区活跃且成熟，拥有48,058 GitHub星标和大量贡献者
- +专注于文档代理和OCR功能，为文档处理提供专业解决方案
- +持续维护和更新，具有完整的CI/CD流程和多平台支持
Cons
- -Significant learning curve due to the framework's extensive feature set and multiple abstraction layers
- -Potential over-engineering for simple use cases that might be better served by direct API calls
- -Heavy dependency on the LangChain ecosystem which can create vendor lock-in concerns
- -从提供的信息中无法确定具体的技术限制和使用约束
- -缺乏详细的功能描述和技术规格说明
Use Cases
- •Building complex multi-agent systems that require planning, tool use, and coordination between different AI components
- •Creating production LLM applications with observability, debugging, and deployment infrastructure via LangSmith
- •Developing chatbots and conversational AI with memory, context management, and integration with external data sources
- •构建能够读取和理解文档内容的AI代理系统
- •开发需要OCR功能的应用程序进行文本提取
- •创建文档智能处理和分析的解决方案
FAQ
- Which is more popular, LangChain or LlamaIndex?
- LangChain has more GitHub stars (147,399 vs 52,392).
- Which is more actively developed, LangChain or LlamaIndex?
- LangChain had more commits in the last 90 days (542 vs 98).
- Should I use LangChain or LlamaIndex?
- Compare their capabilities, limitations and "best for" notes above. Both are open source, so trying each on a small task is the fastest way to decide.