End-to-end encrypted, quantum-resistant email and calendar service run by Tutao GmbH in Hanover, Germany.
Tuta (formerly Tutanota) is an end-to-end encrypted email and calendar service operated by Tutao GmbH, registered in Hanover, Germany since 2011.
All emails, contacts, and calendar entries are encrypted client-side, including subject lines and search index, and Tuta has rolled out post-quantum cryptography across its stack. It offers web, desktop, and mobile apps with a freemium pricing model.
As a privately held German GmbH, it is subject to German and EU data protection law (GDPR) and does not rely on advertising or data monetization for revenue.