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.
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What do you use now?
Posteo primary, and Tuta secondary
Have you done any research on the companies themselves? Good, bad, ideological stances?
Yes. Both are fantastic from an ethics & values perspective imo. Look at tuta on their reddit or blog over time and you can get a good view of the real human team and what they stand for. I would put them on top for their tireless work on behalf of fighting for privacy causes. They work hard at it.
Posteo is harder to find any poltical stances (which is fine by me) but their sustainable values are top notch, check their site and search some details.
Whether either these fit your needs ymmv but like them both