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

360 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

211 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

63 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 Chrome ... Firefox

26 Like

Disroot

Disroot is a project based in Amsterdam, it is maintained by volunteers and depends on the support of its community. We originally created Disroot out of personal need = we were looking for software we could use to communicate, share and organize within our circles. Most of the available solutions were missing the key elements that we find important; Our tools should be open, decentralized, federated and respectful towards freedom and privacy.

Free Open Source Web

18 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 DAVdroid

40 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 Windows Mobile Android iPhone Android Tablet ... iPad Kindle Fire

17 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 OpenPGP

20 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

10 Like

Secure Gmail

An extension to send secure, encrypted messages through Gmail. SecureGmail encrypts and decrypts emails you send in Gmail. This happens all on your machine, and the unencrypted text never reaches Google servers. This is useful if you don't want anyone but the intended recipient to ever read your email (i.e. companies, governments, etc.) Open source With any security project, community involvement is the key to helping identify flaws and verify the what the app is actually doing.

• uses shared password (symmetric) encryption Guest • Sep 2017 Disagree   Agree

Free Open Source Mac Windows Linux Chrome Gmail

7 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.

Freemium Web

9 Like

WebPG

WebPG is a free, open source suite of tools to bring OpenPGP (GnuPG/PGP, gpg, gnupg) to the browser, in an effort to make cryptographic methods usable, safe and accessible to the common man. WebPG encompasses several projects, from the backend technology that interfaces with OpenPGP, to the user interface utilities that bring those methods to the browser.

Free Open Source Mac Windows Linux Chrome Thunderbird ... SeaMonkey Chromium Firefox OpenPGP

1 Like

Lockbin

Lockbin is a web application for sending private email messages and files. People use it to send things like credit card numbers or confidential information.

Freemium Mac Windows Linux Android Android Tablet

4 Like

Walnut Secure Email

Walnut Secure Email is P2P, person to person or end to end secure mail application that protects all of end-user existing accounts, including Gmail, Yahoo Mail, Microsoft Hotmail, live.com, Outlook and hosted addresses, and corporate mail. It supports servers that works on IMAP/ SMTP protocol.

Commercial Windows Linux Android iPhone Blackberry ... Android Tablet iPad

1 Like

AnonymousSpeech

Professional anonymity provider for secure anonymous email. Anonymous Domain and Hosting Offshore, Anonymous Surfing, SSL, Time Delayed, Bulk Email and many more functions.

Freemium Web

Runbox

(Official description) Runbox provides secure email communication with Perfect Forward Secrecy SSL connections, Extended Validation, and options for OpenPGP encryption. We are committed to protecting your data in accordance with Norway's strong privacy regulations, preventing unauthorized access to your email.

Commercial $ $ $ Web OpenPGP

2 Like

Sendinc

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 anyone can use Sendinc to transmit and receive secure messages for free. Sendinc makes email encryption accessible and easy for everyone.

Commercial Web

1 Like

Encipher.it

Encrypting email with Encipher.it is a simple way to protect your sensitive data. You can encrypt emails or text messages and only the recipient can decrypt it with correct password. Encipher.it integrated with Gmail and many other web applications.

Free Open Source Windows Linux Web Chrome

1 Like

Mynigma

Mynigma is a new kind of email client with built-in encryption.

Free Personal Mac iPhone iPad

2 Like