LangChain vs LlamaIndex
Compare these two SDK tools side-by-side to find the best fit for your project.
LangChain
SDK
8.5/10
Application framework for composing LLM chains, agents, tool use, memory, and retrieval across multiple providers and deployment targets.
Visit SiteVS
LlamaIndex
SDK
8/10
Data framework for building retrieval-heavy AI systems with connectors, indexing, reranking, agent workflows, and enterprise search patterns.
Visit SiteQuick Verdict
Choose LangChain if:
- Chain Composition
- RAG Support
- Agent Capabilities
Choose LlamaIndex if:
- Easy Setup
- Developer API
- Active Community
Feature Comparison
| Feature | LangChain | LlamaIndex |
|---|---|---|
| Category | SDK | SDK |
| Pricing Model | Subscription | Usage-Based |
| Starting Price | $39/mo | $500/mo |
| Rating | 8.5/10 | 8/10 |
| Complexity | Intermediate | Intermediate |
| AI Models | DeepSeek | Llama |
| Integrations | Vercel, AWS, Azure, Cloudflare, Zapier | OpenAI, LangChain |
| Best For | AI developers building complex chains, agents, and RAG applications with the most popular AI framework. | Developers building RAG applications with sophisticated data ingestion, indexing, and query strategies. |
LangChain
Pros
- Chain Composition
- RAG Support
- Agent Capabilities
- Provider Agnostic
Considerations
- May require setup time
- Check pricing for your scale
LlamaIndex
Pros
- Easy Setup
- Developer API
- Active Community
- Regular Updates
Considerations
- May require setup time
- Check pricing for your scale