Copilot Studio and the 5 Different Agent Builders

Microsoft's rapid expansion into AI agents has led to a complex landscape of tools within the M365 and Power Platform ecosystems. David Wyatt breaks down the five distinct agent builders currently available: the now-deprecated Agent Files (SharePoint), the standard Agent Builder, the streamlined 'Copilot Studio Light' (Copilot for Microsoft 365), the robust Copilot Studio, and the modern Copilot Studio GitHub Harness. Each tool serves different tactical or strategic needs, ranging from simple knowledge-based agents for specific projects to complex, autonomous business-critical solutions. While Agent Builder and Copilot Studio Light offer accessible, project-focused capabilities, the full Copilot Studio remains the standard for enterprise-scale orchestration. Meanwhile, the GitHub Harness represents the future of agentic development, offering superior performance and memory features at a higher cost. Understanding these distinctions is essential for developers to choose the right tool based on governance, budget, and specific business requirements.