Email Clients

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


When using end-to-end encryption (E2EE) technology like OpenPGP, email will still have some metadata that is not encrypted in the header of the email. Read more about email metadata.

OpenPGP also does not support Forward secrecy, which means if either your or the recipient's private key is ever stolen, all previous messages encrypted with it will be exposed. How do I protect my private keys?

Rather than use email for prolonged conversations, consider using a medium that does support Forward secrecy.

Recommended Instant Messengers

Email Clients


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

Claws Mail

Claws Mail logo 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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