Discover free, open-source, and secure email clients, along with some email alternatives you may not have considered.
Privacy Email Tools
- gpg4usb - A very easy to use and small portable editor to encrypt and decrypt any text-message or -file. For Windows and Linux. GPG tutorial.
- Mailvelope - A browser extension that enables the exchange of encrypted emails following the OpenPGP encryption standard.
- Enigmail - A security extension to Thunderbird and Seamonkey. It enables you to write and receive email messages signed and/or encrypted with the OpenPGP standard.
- TorBirdy - TorBirdy configures Thunderbird to make connections over the Tor anonymity network. This extension is in beta and should be considered experimental.
- Email Privacy Tester - This tool will send an Email to your address and perform privacy-related tests.
- K-9 Mail - An independent mail application for Android. It supports both POP3 and IMAP mailboxes, but only supports push mail for IMAP.
- GNU Privacy Guard - Email Encryption. GnuPG is a GPL Licensed alternative to the PGP suite of cryptographic software. Tutorial. Use GPGTools for macOS.
- Mailpile (Beta) - A modern, fast web-mail client with user-friendly encryption and privacy features.
Bitmessage is a P2P communications protocol used to send encrypted messages to another person or to many subscribers. It is decentralized and trustless, meaning that you need not inherently trust any entities like root certificate authorities. It uses strong authentication which means that the sender of a message cannot be spoofed, and it aims to hide "non-content" data.
- I2P-Bote - End-to-end encrypted decentralized mail system within the I2P network.