Orchestration & Chains
🎯 LangChain vs LlamaIndex
Community Vote — Which tool wins?
LangChain
Tool AToolkit for composing LLM apps, chains, and agents.
Starting Price
Open-source + Paid cloud
Key Strengths
- ✓Largest integration ecosystem in the LLM space — 700+ connectors for models, vector stores, loaders, and tools
- ✓LCEL provides declarative composition with automatic streaming, batching, async, and fallbacks built in
- ✓Comprehensive ecosystem: LangGraph for agents, LangSmith for observability, LangServe for deployment
LlamaIndex
Tool BData framework for RAG pipelines, indexing, and agent retrieval.
Starting Price
Open-source + Cloud
Key Strengths
- ✓300+ data loaders via LlamaHub — the most comprehensive data ingestion ecosystem for LLM applications
- ✓Sophisticated query engines beyond basic vector search: tree, keyword, knowledge graph, and composable indices
- ✓SubQuestionQueryEngine automatically decomposes complex queries across multiple data sources
Which would you choose for...
Vote in each scenario below