Founded
2011
Starting Price
$0
Category
Email Clients
Last updated March 17, 2026
About Tuta
Tuta (formerly Tutanota) is a German end-to-end encrypted email service featuring quantum-resistant encryption. Fully open source with no tracking or ads, Tuta encrypts not just email bodies but also subject lines — a distinction most encrypted email providers lack. Built with privacy-first principles, it offers a built-in encrypted calendar, custom domain support, and anonymous sign-up options.
Pros & Cons
Pros
- Quantum-resistant encryption future-proofs your email security
- Encrypts subject lines unlike most competitors
- Fully open source and independently auditable
- Based in Germany with strong EU privacy laws (GDPR)
- No ads, no tracking, no third-party analytics
Key Features
Quantum-Resistant Encryption
Uses post-quantum cryptography (TutaCrypt) to protect emails against future quantum computer attacks, going beyond standard end-to-end encryption.
Subject Line Encryption
Encrypts email subject lines in addition to the body and attachments — a feature most encrypted email providers do not offer.
Open Source
Fully open-source client code published on GitHub, allowing independent security audits and community verification of privacy claims.
Built-in Encrypted Calendar
Includes an end-to-end encrypted calendar with event scheduling, reminders, and sharing capabilities — all protected by the same encryption.
Custom Domains
Use your own domain for professional encrypted email on paid plans, with full DNS configuration support.
Anonymous Sign-Up
Create an account without providing personal information such as a phone number, supporting truly anonymous communication.
No Tracking or Ads
Pricing
Free
$0/month
- 1 GB storage
- 1 calendar
- Limited search
- Tuta domain only
Revolutionary
$3/month
Best For
Privacy-Conscious Personal Email
Individuals seeking truly private email without tracking or surveillance, with quantum-safe encryption for personal correspondence and sensitive documents
Small Business Secure Communication
Small businesses and startups needing custom domains, shared mailboxes, and admin controls with GDPR-compliant encrypted email
Journalists & Activists Protection
Journalists, whistleblowers, and activists communicating securely with sources using no-phone-number signup and post-quantum encryption
Healthcare & Legal Compliance
Medical professionals and lawyers handling confidential client information with end-to-end encryption and German data protection
Similar Tools
Featured In
#2
8 Best Secure Email Providers for Privacy-Conscious Users in 2026
Best for users who want the strongest possible encryption — including quantum-resistant protection — and are willing to accept app lock-in for maximum security.
#2
7 Best Secure Email Providers for Privacy-Conscious Professionals (2026)
Best for maximum encryption — quantum-resistant protection with subject line encryption for professionals who prioritize security above workflow flexibility
