We have MS teams, Skype and a computer telephony system at work called jabber. My external contacts use zoom, and it seems to work better. Probably why it's come under scrutiny recently because it seems to work better, clearer and easier, no doubt Microsoft are complaining folk are using it!
Skype for me is like hands free in cars (which I think should be banned). Just lots of people sitting round a computer saying "hello", "can you hear me", "didn't make that out, can you say again".