encryption

Posteo

Germany

Independent Berlin email provider with self-operated German servers, data-minimising signup, open-standard clients, and layered optional encryption—not a free-tier ad network.

Proton Mail

Switzerland

Swiss end-to-end encrypted email from Proton AG: zero-access inbox storage, open-source clients, custom domains, and Bridge for desktop IMAP clients.

ginlo Business

Germany

German-hosted secure business messenger from Munich-based ginlo.net GmbH: E2EE chat, files, and A/V calls with Management Cockpit admin for AD/LDAP, policies, and external ginlo Private contacts.