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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I do not know where you got these numbers from, however the 40% aren't correnct. The Linux userbase amounts to less than 1%, atleast on the VPN side. I do however think that this number isn't very different accross all the userbase.
https://www.reddit.com/r/IAmA/comments/10y49ln/were_two_excern_scientists_who_created_proton_vpn/j7w8wxx/
That being said, a new Linux VPN client is currently in development and can already be tested out, more information can be found in the support page as well as on a reddit thread. If you do not rely on a kill switch (depending on your threat model), you could already test that out.
https://protonvpn.com/support/linux-prerelease/
https://www.reddit.com/r/ProtonVPN/comments/15a6f7r/updates_for_the_proton_vpn_linux_alpha/
That's interesting. I would think most people willing to pay for Proton would also switch to a more private OS, guess that's just a small minority of us.