Tutanota

Tutanota is a secure email provider headquartered in Germany that fully encrypts emails end-to-end and stores them on servers powered by renewable energy, making it a popular alternative to its main competitor, ProtonMail. This email service provides users with a fully-encrypted calendar, including encrypted notifications, for comprehensive privacy. Moreover, Tutanota ensures complete anonymity, as free users aren't required to provide any personal information. Tutanota's source code is open-source, ensuring transparency, and it complies with GDPR laws to ensure privacy.

Tutanota's software has been open-sourced since 2014 and is available for review by outsiders on GitHub. Unfortunately, The email service has been blocked in Egypt since October 2019 and in Russia since February 2020 for unknown reasons, although the blockages are thought to be related to recent actions against services operating outside of the country, particularly those that utilize encrypted communications. Despite being blocked in these countries, users can still access Tutanota's service via Tor or VPN.

Tutanota offers support for iOS, Android, Windows, and Linux apps, allowing users to send secure emails from virtually anywhere. The email service's SecureConnect feature allows users to add fully-encrypted contact forms into websites, and its email inbox is ad-free to reduce distractions. Users can keep their contacts safe and available whenever they need them. However, Tutanota's user interface may be slightly clunky compared to its competitors, and only paid users receive email support, whereas ProtonMail offers support for all.

Developer/Owner: Tutao GmbH
Launch date: 2011
Website: tutanota.com

Users: ~2 million users as of 2023