Tuta (Tutanota)
The cheapest end-to-end encrypted mail — quantum-safe by default.
80
sovereigntyTuta (formerly Tutanota) is an open-source, end-to-end encrypted email provider based in Germany under GDPR. It's the budget privacy pick: a free tier with full E2E encryption, and it uniquely encrypts the subject line too. In 2026 it became the first major provider to ship quantum-safe encryption (TutaCrypt, Kyber-1024) to all users by default. The trade-off versus Proton is that it doesn't support OpenPGP, so encrypted mail to outside contacts uses password-protected messages instead.
OPEN SOURCEGPL-3.0
LicenseGPL-3.0
PricingFree (1GB, E2E encrypted); Revolutionary ~€3/mo; Legend ~€8/mo
Open sourceYes
Self-hostableNo
Local-first dataNo
What it does well
- +Open-source, E2E encrypted — including subject lines
- +Quantum-safe encryption for all users by default
- +Cheapest encrypted-mail paid tiers; German/EU privacy law
- +Free tier includes an encrypted calendar
Where it falls short
- −No OpenPGP or IMAP (uses its own encrypted protocol)
- −Fewer ecosystem extras than Proton
- −Search is client-side by design — an encryption trade-off
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Tuta (Tutanota) head-to-head
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