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Proton Mail

Proton AG · CH · since 2014-05

Swiss-based encrypted email with E2EE between Proton users and PGP for outside contacts. Free 1GB tier, paid plans add custom domains and Bridge for desktop clients. Largest privacy-mail provider.

Open sourceAuditedE2EEGPL-3.0Freemium

Pros

  • + Mature ecosystem (Mail/VPN/Drive/Calendar/Pass)
  • + Strong UX vs alternatives
  • + Independent audits

Cons

  • Bridge required for desktop IMAP
  • Search inside encrypted body limited
  • Has logged IPs under court order historically

Highlights

  • Swiss jurisdiction (no NSL)
  • Open source clients on all platforms
  • Bridge for IMAP/SMTP with desktop clients

Specs at a glance

License
GPL-3.0
Open source
Yes
E2EE
Yes
Audited
Yes
Self-host
No
HQ
CH
Pricing
freemium
Platforms
6 platforms