Multi-Agent

AgentScope

Alibaba Tongyi Lab's open-source framework for multi-agent applications

Agnes AI

Singapore model lab with a free multimodal API, paid Token Plans and open weights

AutoGen by Microsoft

Microsoft's open-source multi-agent framework, now in maintenance mode

Google Agent Development Kit (ADK)

Google's open-source, code-first framework for multi-agent AI

OpenAI Agents SDK

OpenAI's small-footprint framework for agents, handoffs and guardrails in code

OpenAI Swarm

OpenAI's deprecated agent framework, replaced by the Agents SDK

SuperAGI

Now a multi-app AI work suite — its open-source agent framework stalled.

VoltAgent

Open-source TS agent framework with a paid observability console