SaaSiidut

SaaSiidut is a term used in discussions of software as a service (SaaS) architecture to describe a pattern of service identity and integration designed for scalable, secure multi-tenant deployments. It is not a formal standard but a concept that recurs in architecture discourse, vendor white papers, and enterprise reviews to distinguish how services are identified, accessed, and governed within a SaaS ecosystem.

The term appears in various sources with no single canonical definition. It is often used when contrasting monolithic, single-tenant deployments with modern architectures that emphasize lightweight, interoperable services and tenant-aware security. In practice, SaaSiidut refers to a set of practices and patterns rather than a fixed technology stack.

Core components typically associated with SaaSiidut include tenant-aware data isolation and compute boundaries; centralized identity and access management per tenant; API-first design with consistent authentication and authorization; a service catalog and dynamic routing to enable composition; telemetry, auditing, and governance; and compliance with data protection and privacy regulations.

Applications of the concept are most common in cloud-native SaaS platforms, enterprise software suites that require strict data separation, and ecosystems that rely on integrations with external services. It is also used in vendor discussions to frame architectural risk, scalability, and maintainability when evaluating multi-tenant solutions.

See also: Software as a Service, multi-tenant architecture, identity and access management, API management, cloud-native architecture.