To whitelabel your account go to Reports > Whitelabeling.  

In this section, you have the option to enable white labeling for reports, as well as for the application domain.

Choose Enable Whitelabeling for reports, then add your company name, website, and logo. This will apply your brand identity to all reports.

White-labeling your account is highly useful for customizing your reports. By adding your company details here, you can generate reports featuring your own logo and name instead of the BrandMentions branding.

You also have the option to fully customize the app’s domain or subdomain. Here's how to enable white label for application domain.