At some point, essentially everyone has to trust the product and more importantly, the company/the people in the company. Firstly its worth clarifying that there isn't really something akin to zero-trust in such cases. Thus the theoretical theorycrafting about mechanisms. Those show that you have to trust proton

Now, My issue with proton is that, they try to appear transparent but a lot of what they've done especially with proton meet seems to sometimes even be misleading. If they couldn't create EU/Swiss sovereign infrastructure for meet, then why are they using Cloud-act providers while within the same post talking about the implications of Cloud Act. There is some great irony in all of this and this is what is making me suspicious and how Proton seems to be misleading people rather than leading them towards more privacy.

At some point, it raises atleast some questions about trusting proton.

> And how does that compare to other services we have available and people actually use.

That depends on what service are you talking about from, Do you want a whole eco-system or are you happy with individual apps/companies focusing on one thing in a more unix-fashion of things.

Do you prefer non-profits or for-profit companies to handle such infrastructure?

How familiar you are with self-hosting and what is your threat vector?

Are you a corporate or a person yourself and what are your budget of things?

but just to give a pointer without asking these questions, Some good pointers are posteo.de, tutanota, infomaniak (has whole ecosystem) Within the calling system, I personally used to use fairmeeting.net, it used to have screen sharing option for free as well but looks like they might have paywalled it recently. You can find multiple jitsi community instances.

I feel like the only way to answer this question is if people ask with more depth. The threat model differs for everybody, for some people (like journalists), even just this proton meet fiasco is enough for them to reconsider proton ecosystem as a whole and consider it too threatening, especially with recent incidents and their lives being on the line. You might say, well where might they go and I feel like they might go to disroot (non-profit activism oriented) or tutanota or even posteo.de depending on what they might prefer.