Alternatives to WebPG 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 Privacy protection Custom domain ... Encrypted email Anonymous email PGP Encryption 4096 Bit encryption Anonymity Encrypted Connection Mobile friendly Multiple languages Support for Multiple Users Self destructing messages Very strong privacy Add a feature

339 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

59 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
Kolab Now

Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day online comms easier, smarter and most importantly; secure.

Commercial Open Source Web DAVdroid
CalDAV CardDAV Real time collaboration Add a feature

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....

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

16 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
MsgSafe.io

MsgSafe.io provides private, encrypted, online communication with layers of security you can trust.

Freemium Web Android iPhone S/MIME OpenPGP
Encrypted email End-to-end encryption Privacy focused Anonymity ... Email Analytics Encrypted chat Integrated Spam Protection S/MIME support Add a feature

19 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
FlowCrypt

FlowCrypt (formerly CryptUp) is the easiest PGP encryption for Gmail. It behaves just like standard email, except it's encrypted.

Freemium Mac OS X Windows Linux Web Android ... Chrome OS Chrome Firefox OpenPGP
Google Chrome extension Encrypted email End-to-end encryption Firefox extension ... Gmail integration Public key encryption Add a feature

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. ...

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

9 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
AnonymousSpeech

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

Freemium Web
Surf Anonymously Add a feature

2 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...

Commercial Windows Linux Android iPhone Blackberry ... Android Tablet iPad
Encrypted email Add a feature

1 Like
Runbox

(Official description) Runbox provides secure email communication with Perfect Forward Secrecy SSL connections, Extended Validation, and options for...

Commercial $ $ $ Web OpenPGP
Support for IMAP Add a feature

2 Like