Copilot Studio is a streamlined, low-code platform that emphasizes ease of use and native Microsoft 365 integration for rapid AI agent creation. Foundry Agent Service, on the other hand, is a flexible, pro-code solution with extensive developer tooling and continuous integration and continuous delivery (CI/CD) integration designed for complex enterprise scenarios. It uniquely supports multi-agent orchestration, enabling dynamic collaboration among specialized agents. Additionally, Foundry Agent Service offers advanced security, compliance features, flexible model support, and a wide array of connectivity options, making it better suited for large-scale, regulated environments.