Should you use #Zoom for confidential conversations?
Let's have a quick look at security...
Let's call that a 'no'.
@imacrea @nextcloud Libre software aren't totally secure etiher (at the end of day it's only a matter of pratice of distributing softwrae, doesn't have anything to do with the actuel technical part), but if they aren't libre, you can't say. It's a necessary condition.
I would also advice mumble (not because it's bullet proof, but because it's an under used solution : and under used solution are safer, because less attacked).
Of cours it's not enought to tell (you should know if it's a critical problem or a small one), but it gives the sens of "how much problem is found an set public". My big guess is, the most of software is used and therefore attacked, the most problems are gound.
I just want to add : even if a software was bullet proof, the setup of it counts a loooot. Let say the HTTPS was bullet proof : a lot of people set it up in horribles ways so it's not secure at all using outdated methods. You can check the websites or service you use with simple diagnostic service like thoses : https://tls.imirhil.fr/