Team Communication Software With Custom Branding — Any Good Options?

For enterprises that want custom-branded team communication software, which platforms work well in real deployments?

We’re evaluating solutions beyond standard tools like Slack or Microsoft Teams, including MirrorFly, Apphitect, Zoho Cliq, and Troop Messenger, mainly for branding control and customization.

How do these platforms compare in terms of customization depth, security, and long-term manageability?