FusionAuth provides a way to create multiple tenants within a single installation, allowing for logical separation of users and applications while maintaining administrative control. This feature enables companies to offer private-labeled versions of their SaaS application to clients, with each tenant having its own email templates, themes, application configurations, and users. Tenants can be created automatically using the API, automating the process of setting up new accounts for premium clients. While this approach requires some upfront planning, it offers operational simplicity and logical separation of data, making it a more efficient way to manage multiple clients compared to running separate FusionAuth servers.