Tuta Mail is described as 'End-to-end encrypted app for email, calendar, and contacts, requiring no personal data, with open source code and quantum-resistant security' and is a leading webmail provider in the office & productivity category. There are more than 100 alternatives to Tuta Mail for a variety of platforms, including Web-based, Android, iPhone, iPad and Mac apps. The best Tuta Mail alternative is Proton Mail, which is both free and Open Source. Other great apps like Tuta Mail are Gmail, Proton Calendar, Disroot and Posteo.
HEY Calendar is a digital scheduling tool designed with a unique approach to managing time and tasks. It offers a feature that allows users to rename days according to their significance, such as designating a day as 'Travel day', 'Anniversary', or 'No work...
OnionMail is an anonymous and encrypted mail server made to run on the TOR network without losing the ability to communicate with the Internet.
MeSign is a free email encrypted client. Once you log in to your email account with MeSign App, the free S/MIME certificates will be issued, installed and configured automatically. The users can start to encrypt within 3 minutes.
FREE e-mail account with IMAP, spam and virus protection with UNLIMITED storage (GMail max. 15 GB). Because of this AOL WebMail is ideal as E-mail archive or E-Mail-Backup utility for other Mail accounts.
eclipso Mail & Cloud is an complete and secure e-mail system from Germany with many useful and practical functions: Antispam, unlimited email folders, webmail, mobile app, Postoffice, fax and cloud storage. and many more.
A privacy-first calendar that works offline and looks beautiful. Connect to iCloud — or don't. Your schedule, your choice.
Encrypted email inbox with calendar support, tasks, notes, bulk import, search features, key storage, encrypted cloud storage, file sharing.
Secure email made simple
Sendinc enables anyone to send and receive military-grade encrypted email in minutes and requires no special technical expertise. There is no required software to purchase, download, or install. There are no keys to generate, publish, or maintain. And a.
Titan is the first business email suite that helps you build deeper, more meaningful relationships with your customers.
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Tutanota is a webmail service that gives you easy-to-use encryption. Mynigma is an email client (not service) for Mac/iPhone/iPad and it's not open source. In that sense, not really a replacement.