AutoGen

AutoGen is a Python framework open-sourced by Microsoft Research in 2023, designed for Multi-agent System applications. It models inter-agent communication as plain message passing and ships with ready-made roles like user proxy, assistant, code executor, and group chat. The idea of letting several specialist agents "talk through" complex tasks resonated strongly in the research community. The v0.4 rewrite in 2024 moved it toward a more message-driven, distributed architecture; it competes in the same space as LangGraph and CrewAI.