SimpleLogin is an email alias service that protects the user's real address. Mail sent to an alias is forwarded straight to the user's own mailbox, and replies go out through the alias so the personal address stays hidden. Users can connect their own domain, use browser extensions and install the Android and iOS apps. PGP encryption before forwarding and two-factor authentication with TOTP and WebAuthn are supported.
SimpleLogin is operated by Proton AG, which is domiciled in Geneva, Switzerland, and the service is governed by Swiss law. The service runs on servers from Proton and from UpCloud, a Finnish cloud provider. Its components are open source, and the vendor describes a self-hosting option, so a European organisation can run the service on its own infrastructure. Proton also names an EU representative in Luxembourg for its services.