Alternatives to RingCentral

Several years ago Tom was recommending RingCentral. I’m a solopreneur in Canada, and have been using RingCentral for several years, but am looking for alternatives beause their desktop app does not support Linux, and their Android app is tied into Google services and has numerous trackers.

Do I have any viable alternatives?

As an aside, has anyone found a usable way to substitute VOIP over cell data for voice/text cell service.

Can you please elaborate more on this?

I am not sure about Canada, but in the US that are a few service providers that can provide you a SIM that uses your own SIP connection. Some use Verizon towers for connectivity.

Are you looking for a service to use yourself or something to resell?