Alternatives to GhostMail for all platforms with any license

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...

Freemium $ $ $ Open Source Web Android iPhone iPad
End-to-end encryption Privacy focused Encrypted email Privacy protection ... Custom domain Anonymous email PGP Encryption 4096 Bit encryption Anonymity Encrypted Connection Mobile friendly Multiple languages Support for Multiple Users Self destructing messages Add a feature

346 Like
Tutanota

Tutanota is a free and open source web-mail client that focuses on privacy. There's also an Android and an iOS app. All data is stored encrypted and can not be...

Free Personal $ $ $ Open Source Web Android iPhone iPad
Encrypted email End-to-end encryption Privacy focused Anonymity ... Clean design Encrypted Connection Multiple Account support Privacy protection Share files Add a feature

208 Like
GnuPG

GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kinds of public key...

Free Open Source Mac Linux PortableApps.com Xfce OpenPGP
Encrypted email Add a feature

104 Like
Enigmail

Enigmail is a security extension to Mozilla Thunderbird and SeaMonkey.

Free Open Source Mac Windows Linux GnuPG Thunderbird ... SeaMonkey
Privacy protection Add a feature

61 Like
Mailvelope

Mailvelope is a browser extension that allows to exchange encrypted emails following the OpenPGP encryption standard. Mailvelope integrates directly into the Webmail...

Free Open Source Mac OS X Windows Linux Chrome OS Chrome ... Firefox
Google Chrome extension Firefox extension Add a feature

26 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....

Commercial Web Windows Mobile Android iPhone Android Tablet ... iPad Kindle Fire
Built-in Calendar Encrypted email Privacy focused Ad-free ... Gpg encryption Self destructing messages Two factor authentication Add a feature

17 Like
GPG Suite

GPG for Mail is an open source plugin for Apple Mail. Encrypt, decrypt, sign and verify mails using OpenPGP with a few simple...

Free Open Source Mac OS X GnuPG
No features added Add a feature

8 Like
APG

Android Privacy Guard (APG) is a free and open source application for Android devices, created by Thialfihar, that lets you encrypt and decrypt single files or emails.

Free Open Source Android Android Tablet OpenPGP
No features added Add a feature

9 Like
GPGMail

GPGMail is an open source plugin for Apple Mail. It brings the functionality to sign, verify, encrypt and decrypt mails using the...

Free Open Source Mac OS X GPGTools
No features added Add a feature

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...

Free Open Source Mac OS X Windows Linux Chrome Gmail
Google Chrome extension Add a feature

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. ...

Freemium Web
Anonymity Encrypted email End-to-end encryption Add a feature

9 Like
OneTime

OneTime is an open source encryption program that uses the one-time pad algorithm to allow two parties to communicate privately. It has features to assist with the...

Free Open Source Mac OS X Windows Linux
Command line interface Add a feature

1 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...

Free Open Source Mac OS X Windows Linux Chrome Thunderbird ... SeaMonkey Chromium Firefox OpenPGP
Google Chrome extension Firefox extension Add a feature

1 Like
iGPMail

iPGMail is an app that implements the OpenPGP standard (RFC 4880, RFC 6637) and allows the user to create and manage both public and private (RSA, DSA, ECDSA) PGP keys...

Commercial $ $ $ iPhone iPad
No features added Add a feature

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 OS X Windows Linux Android Android Tablet
No features added Add a feature

4 Like