Microsoft's Three Agent Build Paths: How to Choose in 2026

Microsoft offers three ways to build AI agents: Copilot Studio (low-code SaaS), Foundry Hosted (managed PaaS for custom containers), and the M365 Agents SDK (self-hosted pro-code). The right choice depends on who builds it, who owns the runtime, and required channel reach. The article provides a decision framework based on Microsoft's Cloud Adoption Framework.