Hi @alexsam,
Welcome to the Community.
Building a custom video chat platform offers flexibility for specific features and branding. Providers like MirrorFly, Apphitect, and Sendbird are not available through Zapier. Choosing the right provider depends on your particular needs, so it's worth discussing your requirements with each app. While Zapier doesn't build video chat platforms, it can help automate workflows between your chosen platform and other apps.
I hope this helps. We're here to answer any more questions you may have.