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Chatbots answer; AI agents act. Chatbots are stateless and single-turn; agents are stateful and multi-step. The line blurs when chatbots get tools, but the core architectural difference still shapes what each is good for.
LangGraph wins on control and debuggability. CrewAI wins on team abstractions. AutoGen wins on conversational multi-agent patterns. No single framework is best — the right choice depends on your task structure, team size, and tolerance for complexity.
CrewAI wins when your multi-agent workflow maps naturally onto human team roles. AutoGen wins when agents need to deliberate, debate, and build on each other's work conversationally. Both are mature, well-supported, and genuinely different in how they model coordination.