FlowCrypt Alternatives and Similar Software

ProtonMail

Secure email with absolutely no compromises, brought to you by MIT and CERN scientists. Swiss Based ProtonMail is incorporated in Switzerland and our servers are located in Switzerland. We are outside of US and EU jurisdiction and all user data is protected by strict Swiss privacy laws. Zero Access Because of our end-to-end encryption, your data is already encrypted by the time it reaches our servers.

Freemium $ $ $ Open Source Web Android iPhone iPad

512 Like

Tutanota

Tutanota is a free and open source web-mail client that focuses on privacy and security. It has open source iOS and an Android apps. The Android app is published on F-Droid (which means the app does not use Google's push notification system) making it a great option if you want to de-Google your life. All data is stored encrypted and can not be searched, i.e. for commercial use. It offers dead easy end-to-end encryption. 1 GB of storage is free for everyone.

Free Personal $ $ $ Open Source Web Android iPhone iPad F-Droid

301 Like

Enigmail

Enigmail is a security extension to Mozilla Thunderbird and SeaMonkey. It enables you to write and receive email messages signed and/or encrypted with the OpenPGP standard. Sending and receiving encrypted and digitally signed email is simple using Enigmail. When starting it for the first time, you are guided through the basic setup. We also prepared a new users guide that explains how to use OpenPGP.

Free Open Source Mac Windows Linux GnuPG Thunderbird ... SeaMonkey

69 Like

mailbox.org

mailbox.org offers a secure e-mail account for home and business use. The domain name, me@mailbox.org, is easy to remember and can be understood anywhere in the world. They have been operating e-mail accounts for more than 20 years and are a highly reliable service provider.

Commercial $ $ $ Web

36 Like

Yandex.Mail

Yandex.Mail for mobile is an inbox in your pocket which provides secure protection from spam and viruses. • You can use Mail without an internet connection. For example, if you lose your connection in the metro, you can continue reading your messages and reply to them. When you’re back online, those messages will be automatically sent. • The app supports using several inboxes at the same time, including Yandex.Mail for domains.

Free Web Windows Mobile Android iPhone Java Mobile ... S60 Android Wear

133 Like

Mailvelope

Mailvelope is a browser extension that allows to exchange encrypted emails following the OpenPGP encryption standard. Mailvelope integrates directly into the Webmail user interface, it's elements are unintrusive and easy to use in your normal workflow. It comes preconfigured for major Webmail provider: - Gmail - GMX - Outlook.com - https://alternativeto .

Free Open Source Mac Windows Linux Chrome OS Microsoft Edge ... Chrome Firefox

36 Like

MsgSafe.io

MsgSafe.io provides private, encrypted, online communication with layers of security you can trust. With rocketing growth online and improvements to computer capacity, governments and private sector are collecting and sharing information on every facet of people’s lives. MsgSafe.io is dedicated to actively improving privacy protection with innovative technology.

Freemium $ $ $ Web Android iPhone S/MIME Software as a Service (SaaS) ... OpenPGP

28 Like

Kolab Now

Kolab Now, formerly MyKolab, is a fully featured secure collaboration and communication service that is easy to use on any device. Whether you are a legal counsel, journalist, diplomat or just a regular user: Kolab Now empowers your collaboration and communication, wherever you are. Thanks to a unique mix of usability and security with exclusive hosting in Switzerland, Kolab Now allows law firms, SMEs and other organisations to focus on their core business.

Commercial $ $ $ Open Source Web Software as a Service (SaaS) DAVdroid

41 Like

GPGMail

GPGMail is a PGP plugin for Apple Mail. It brings the functionality to sign, verify, encrypt and decrypt mails using the OpenPGP standard.

Commercial $ $ $ Mac GPGTools Apple Mail

11 Like

SCRYPTmail

SCRYPTmail is true end-to-end encrypted email service. Email and meta data, i.e sender / recipient are encrypted when you communicate within scryptmail domain. Public Source Code - all source code is available for public audit, this include front and back end code. True Zero Data Knowledge - because we also encrypt sender and recipient there is zero information third parties can learn if our server ever get compromised.

• Discontinued
  Service closing, see https://blog.scryptmail.com/discontinuing-of-service/

Freemium Web

10 Like