Mailfence

Mailfence delivers true OpenPGP end-to-end encrypted email from Belgium, pairing private messaging with integrated calendars, documents, contacts, and groups in one browser-based suite. Run by ContactOffice Group, it has operated independently since 1999 and positions itself as the interoperable alternative to walled-garden encrypted inboxes.

Encryption happens client-side in the browser so plaintext never reaches Mailfence servers, and the built-in OpenPGP keystore manages key generation, import, export, and digital signatures. Users access mail via web, POPS, IMAPS, SMTPS, ActiveSync, or mobile apps, meaning Thunderbird, K-9, and Apple Mail all work out of the box.

Key advantages include:

• Browser-side OpenPGP encryption fully interoperable with other PGP services.
• Digital signatures and keystore generate and verify keys without extra plugins.
• Integrated calendar, documents, and groups for end-to-end encrypted collaboration.
• Custom domains from the Base tier scaling to 200 aliases on Ultra.
• No ads, trackers, or backdoors funded purely by paid subscriptions.

Servers are located exclusively in Belgium, where strict privacy law requires a Belgian judicial order before any data disclosure and data never leaves EU jurisdiction. Mailfence is GDPR-compliant, contributes a share of paid-plan revenue to the EFF and EDRi, and publishes an ongoing transparency report.

Recommended for professionals, lawyers, and activists who need interoperable PGP with a familiar groupware experience, not a proprietary silo.