Posteo vs Tuta Mail

Posteo is an independent, Berlin-based email service that runs entirely on green energy and never displays ads or tracks users. It bundles email with calendar, address book, and notes functionality, and lets people sign up anonymously without providing personal information.

Tuta Mail is an encrypted email service from Germany focused on privacy, offering end-to-end encryption, an ad-free interface, and no tracking. It describes itself as the world's first end-to-end encrypted email service with quantum-resistant cryptography, and complies with GDPR through a zero-knowledge architecture. All Tuta clients are fully open source and can be audited by security experts, with code available on GitHub. The service also includes an encrypted calendar and contacts, custom domain support, and is available on web, Windows, macOS, Linux, Android, and iOS, with a permanently free tier alongside paid Revolutionary and Legend plans.

• No ads or tracking, funded purely by subscriptions
• Anonymous signup protects user privacy
• Bundled encrypted calendar and contacts included
• Runs entirely on green energy

• Free tier is permanent and includes real end-to-end encryption
• Fully open-source clients that can be independently audited
• Quantum-resistant encryption ahead of many mainstream providers
• Native apps across web, desktop, and mobile platforms

• Storage starts small at 4 GB before upgrades
• No free tier available
• Fewer productivity integrations than mainstream providers

• Free tier storage is limited to 1 GB
• Encrypted search and some features work differently than standard webmail
• Based in Germany, which may matter for users with specific jurisdiction concerns