[basch]

simplelogin for sms is definitely a space lacking in the consumer product market.

family home management and communication routing in general is a blank space with almost nothing. it extends into every market. childrens medical bills only appearing in one of two parents accounts etc. communication from an entity to a family is ripe for disruption and standardization.

have you looked at business support tools such as https://missiveapp.com/blog/what-is-sms-shared-inbox

[tcrhelpforsms]

I believe I had come across Missive while investigating. I will admit I haven't tried signing up. But given that it is marketed towards businesses, I expect as soon as one does they'll require you to provide all the information you would need to be registered as part of TCR. If this is incorrect, let me know and I'll dig deeper.