Email Clients

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


Even when using end-to-end encryption technology like GPG, email is inherently insecure and should not be trusted for sensitive communications. Metadata is always communicated in plaintext, and even when encryption is used correctly it is very easy for either party to accidentally respond to or forward a previously encrypted message in plaintext in many clients. GPG also does not easily support modern crypto functionality such as key rotation and forward secrecy.

We recommend the following email providers for routine notifications and messages from other services that require an email address. For communications that need to be safe and secure, you should use a dedicated instant messaging tool, such as Signal.

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

Worth Mentioning