Webex linux support is unbelievably poor(literally, greater than a 1/2 days work to get it installed on linux). Sound quality deteriorates on international calls. Just really crappy experience overall.
Zoom has rpms/deb packages available. Installation- 30 secs.. Sound quality was crystal clear on international calls.
Webex is one of the few product offerings that makes me truly angry.
Zoom was best followed by gotomeeting.
Paid Zoom works generally well, and much better on mobile than alternatives - you can also record meetings, and the recordings are of decent quality.
There are still many improvements that are possible but at the moment, it's the best service I've used for video conferencing.
I use it actively on both Mac and Linux.
Not affiliated with Zoom at all, just a very pleased user :)
There is also https://www.bluejeans.com/ which usually works fine in the company.
Skype for Business? Lol. If only it was possible to _join_ a meeting without an account, that would be great.
EDIT: someone asked if I'm seriously recommending bluejeans; I am, yes. Indeed it's hilariously CPU heavy and their linux support is a joke, but it's still working compared to other solutions. At work we have some vidconf equipment in some rooms which can dial bluejeans on their own and they usually work pretty well, so yes.
Full disclosure: I was briefly on the Jitsi team.