A multi-tenant architecture is a

A multi-tenant architecture is a software architecture where a single application instance serves multiple customers (tenants) while keeping each tenant's data and configuration isolated.

Example

Imagine a SaaS CRM platform:

- Company A uses the CRM.

- Company B uses the same CRM.

- Company C uses the same CRM.

All three companies share the same application, but:

-> Their users only see their own data.

-> Their settings, branding, and permissions can be different.

-> The platform provider maintains only one codebase.