German encrypted email, calendar and contacts from Tutao GmbH with end-to-end/post-quantum encryption and open-source...
German privacy email from Posteo e.K. with anonymous signup/payment options, no ads and no linking of payment data to...
German secure email and workspace service with mail, Drive, calendar, contacts and OpenPGP. Pseudonymous signup is...
Belgian encrypted email and groupware provider with OpenPGP support, calendar, contacts, documents and paid plans....
Open-source email aliasing service. Creates forwarding aliases to protect a real inbox, supports self-hosting, and...
Swiss end-to-end encrypted email service with free accounts, no phone-number signup by default, zero-access encryption...
Open-source email alias service owned by Proton AG. Aliases forward to a real mailbox and support replies without...