CopilotKit Raises $27M Series A: AG-UI Protocol Adopted by Google, Microsoft, Amazon, Oracle for Agent-to-Frontend Communication

TechCrunch·medium signal

CopilotKit closed a $27M Series A led by Glilot Capital, NFX, and SignalFire, building the enterprise agentic frontend stack for agent-human collaboration inside applications. Their AG-UI open-source protocol standardizes how agents connect to user interfaces with streaming, tool calls, and state sharing, now supported by Google, Microsoft, Amazon, Oracle, LangChain, Mastra, and PydanticAI. Enterprise customers include Deutsche Telekom, Docusign, Cisco, and S&P Global.