Tuta Mail

Tuta is a German encrypted email, calendar, and contacts service that applies end-to-end and zero-knowledge encryption to everything, including subject lines, metadata, and calendar entries that most "encrypted" services leave exposed. Founded in Hannover in 2011, it is the only major email provider to have implemented post-quantum cryptographic algorithms to protect against future decryption attacks.

Available on web, Android, iOS, Windows, macOS, and Linux, Tuta encrypts all data automatically with no plugins or setup. A forever-free plan covers a single inbox, while paid tiers add custom domains, unlimited alias addresses, and shared team inboxes with admin controls.

Key benefits:

• Full E2E encryption covering subject lines, metadata, and calendar event details
• Post-quantum cryptography protecting stored data against future quantum attacks
• Zero-knowledge calendar so even Tuta cannot read your appointments
• No tracking, no ads, entirely subscription-funded with no data monetisation
• Unlimited email aliases on paid plans for inbox compartmentalisation
• Custom domains for individuals and business teams
• Open-source clients for independent cryptographic verification
• Forever-free plan with a @tuta.com address and no expiry

Developed and hosted entirely in Hannover, Germany, under strict GDPR and German data protection law. Tuta runs on 100% renewable energy, has no ties to advertising networks or data brokers, and stores all data on servers in Germany. No data is ever shared with or accessible by third parties.

Trusted by 10,000+ businesses, financial institutions, and human rights organisations who need provably private communication beyond what standard email providers offer.