LangChain vs LlamaIndex vs CrewAI vs AutoGen: Choosing an AI Framework

Framework selection depends heavily on target use cases:

• **LlamaIndex**: Specialized for data ingestion, indexing, and complex search workflows.
• **LangChain / LangGraph**: Ideal for stateful graphs, human-in-the-loop workflows, and fine-grained agent control.
• **CrewAI / AutoGen**: Designed for multi-agent collaboration with role-based delegation.