Ok, so I just read upon Proton AG, the company behind Proton, and they don't seem to owe investors money, because it was originally crowdfunded and now it finances itself with subscriptions. That sounds great! It is quite different to surveillance capitalism and enshittification (given that enshittification requires advertisers).

I am not advertising for Proton, by the way. To make that clear, I still wouldn't use them because they seem to have very limited VPN functionality in their Linux clients. As a Linux user, I wouldn't want that. However, if they fix that in the future, I could consider switching.

Edit: Similarly, I found this website https://www.ethicalconsumer.org/company-profile/tutao-gmbh summarizing its evaluation of Tutanota as ethical. It takes into consideration its ownership structure. Unfortunately, I cannot find details because there is a paywall for the information, but it could be the case that Tutanota does not owe money to investors and therefore is not seeking to maximize profits but rather provide a good service while compensating fairly its workers. I wish I could have more evidence.

I like that, if I only need mail with 20gb of storage, Tutanota is cheaper.

I don't know what to do. I'll have to think a bit longer.