Email Clients

Discover free, open-source, and secure email clients, along with some email alternatives you may not have considered.

Email Clients


Thunderbird Thunderbird is a free, open source, cross-platform email, newsgroup, news feed, and chat (XMPP, IRC, Twitter) client developed by community, previously by the Mozilla Foundation.

Claws Mail

Claws Mail Claws Mail is a free and open source, GTK-based email and news client. It offers easy configuration and an abundance of features. It is included with Gpg4win, an encryption suite for Windows.

Privacy Email Tools

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Email Alternatives


Bitmessage 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.


RetroShare Retroshare creates encrypted connections to your friends. Nobody can spy on you. Retroshare is completely decentralized. This means there are no central servers. It is entirely open-source and free. There are no costs, no ads, and no Terms of Service.

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