Multitenant Video Intercom System w/ Mobile App

I am looking for a multi tenant IP based video intercom system that will have to support at least 10 tenants. The intercom system has to have a mobile app where the tenant can have 2 way communication as well as see the person at the door.

One company I found was butterflymx but I have no experience with them. Has anyone worked with them or another similar company?

Thanks for the help in advance

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