Isolating tenants, managing costs, and ensuring reliability are core challenges for any multi-tenant SaaS app. This session provides a blueprint on Azure using real world examples. We'll dive deep into the data tier, contrasting Azure Cosmos DB’s DB-per-tenant pooling model against the partition-key-per-tenant strategy to find your ideal balance of cost and isolation. Learn how these choices impact your TCO and security posture and manage tenants with design patterns like deployment stamps.