Multiple Custom Domain Use Cases

Auth0 Multiple Custom Domains (MCD) feature offers powerful flexibility, allowing organizations to manage diverse branding, regional requirements, and partner integrations all from a single Auth0 tenant. This simplifies identity management while providing a seamless, branded experience for your users.

Some businesses, like airlines, require different top-level domain names (for example: .com, .co.uk, .com.au) even with a single user base. This is often driven by jurisdictional regulations or customer preferences. With MCD, you can easily create this setup in Auth0, running a single tenant with a unified user store while offering multiple top-level domains. For example, your primary website might be exampleco.com, but you can also operate exampleco.co.uk and exampleco.com.au.

It is common for businesses to own several brands, each with its own domain, but benefit from a single user store and other unified features of a single Auth0 tenant. In retail, for instance, a company might manage distinct brands offering upscale home furniture (brand1-home-furniture.com) and office furniture (brand2-office-furniture.com). MCD allows these brands to maintain separate domain names while sharing a centralized user store and Auth0 setup.

Many SaaS providers offer their services in a white-labeled model. Imagine job-saas.com, a platform for managing job applications. Client companies can host job-saas.com services under a subdomain of their own and customize its look and feel, such as jobs.client-a.com and jobs.client-b.com. With MCD, job-saas.com can maintain its entire Auth0 configuration in a single tenant, yet offer different organizations and custom domains directly to its customers.