RedTrack allows adding unlimited Custom Domains for all customers subscribed to Professional plan and above.
For the Starter plan, we've included the possibility to add up to 3 Custom Domains.
Custom Domains can be added for tracking purposes from the Domains section (Tools ->Domains). Detailed instructions and video guides can be found here.
Additionally, you can choose what will be displayed upon accessing your Custom Domain directly. By default, the visitor will see 404 page. If you wish to change this setting, Root Domain URL can be set up from the Domains tab.