view the rest of the comments
Proton
Empowering you to choose a better internet where privacy is the default. Protect yourself online with Proton Mail, Proton VPN, Proton Calendar, Proton Drive. Proton Pass and SimpleLogin.
Proton Mail is the world's largest secure email provider. Swiss, end-to-end encrypted, private, and free.
Proton VPN is the world’s only open-source, publicly audited, unlimited and free VPN. Swiss-based, no-ads, and no-logs.
Proton Calendar is the world's first end-to-end encrypted calendar that allows you to keep your life private.
Proton Drive is a free end-to-end encrypted cloud storage that allows you to securely backup and share your files. It's open source, publicly audited, and Swiss-based.
Proton Pass Proton Pass is a free and open-source password manager which brings a higher level of security with rigorous end-to-end encryption of all data (including usernames, URLs, notes, and more) and email alias support.
SimpleLogin lets you send and receive emails anonymously via easily-generated unique email aliases.
Cool, when will the bridge get caldav support?
I don't use the Proton calendar at all because I can't use it with GNOME nor Thunderbird, so I have to use a local calendar.
This is a mission critical issue that prevents further adaptation for me. I could never use the calendar meaningfully for business purposes. It is absolute pain in the neck.
It also bugs me that there is no lookup for addresses/locations on calendar invites. For a premium-priced product, one can expect this to be functional. How hard can it be to integrate a call to openstreetmap or similar.
Frankly, the product feels a bit beta-ish for a paid for product.
Nail on the head. I will keep Proton for personal use, but for professional use, I'll unfortunately be moving away for these and so many more reasons. It's not a ready product at all.