# Open-source email clients

15 open-source email clients rated against public privacy criteria.

1. [Betterbird](https://privacyratings.com/email-clients/betterbird/) (our pick): B (89/100). Fork of Mozilla Thunderbird that follows its Extended Support Releases and adds extra fixes and features. Available for Windows, macOS and Linux.
2. [Delta Chat](https://privacyratings.com/email-clients/delta-chat/): A (92/100). Decentralized messenger that uses email servers for delivery, with automatic end-to-end encryption through Autocrypt and OpenPGP. Works with chatmail relays or existing email accounts.
3. [aerc](https://privacyratings.com/email-clients/aerc/): B (89/100). Terminal email client for Linux and macOS with IMAP, JMAP, Maildir and Notmuch support and PGP encryption through GnuPG.
4. [Claws Mail](https://privacyratings.com/email-clients/claws-mail/): B (89/100). Lightweight GTK email and news client for Linux and Windows, extended through plugins for OpenPGP, HTML rendering and spam filtering.
5. [Evolution](https://privacyratings.com/email-clients/evolution/): B (89/100). GNOME groupware application for Linux that combines email, calendar, contacts and tasks, with support for IMAP, POP3, Exchange and OpenPGP.
6. [KMail](https://privacyratings.com/email-clients/kmail/): B (89/100). KDE email client for Linux, part of the Kontact suite, with support for IMAP, POP3, OpenPGP and S/MIME.
7. [Mutt](https://privacyratings.com/email-clients/mutt/): B (89/100). Text-based terminal email client for Unix-like systems with built-in IMAP, POP3 and SMTP support, message threading and OpenPGP and S/MIME encryption.
8. [NeoMutt](https://privacyratings.com/email-clients/neomutt/): B (89/100). Terminal email client for Linux and macOS based on Mutt, with built-in IMAP, POP3, SMTP and OpenPGP support.
9. [Thunderbird for Android](https://privacyratings.com/email-clients/thunderbird-for-android/): B (89/100). Open-source email app for Android from the Thunderbird project, based on K-9 Mail, which remains available as a variant. Works with any IMAP, POP3 and SMTP provider.
10. [Mozilla Thunderbird](https://privacyratings.com/email-clients/mozilla-thunderbird/): B (86/100). Open-source desktop email client for Windows, macOS and Linux with calendar, contacts and built-in OpenPGP and S/MIME encryption.
11. [Alpine](https://privacyratings.com/email-clients/alpine/): B (83/100). Text-based email client derived from Pine, for Unix-like systems and Windows, with built-in IMAP, POP3 and SMTP support and S/MIME encryption.
12. [FairEmail](https://privacyratings.com/email-clients/fairemail/): B (83/100). Open-source email app for Android that works with any IMAP, POP3 and SMTP provider and supports multiple accounts with a unified inbox.
13. [Himalaya](https://privacyratings.com/email-clients/himalaya/): B (83/100). Command-line email client that manages mail over IMAP, JMAP, SMTP, Maildir, the Gmail API and Microsoft Graph, with composing and reading handled by the companion MML tool.
14. [Geary](https://privacyratings.com/email-clients/geary/): B (78/100). Email app for the GNOME desktop on Linux that groups messages into conversations and works with IMAP accounts.
15. [Sylpheed](https://privacyratings.com/email-clients/sylpheed/): C (72/100). Lightweight GTK email client for Linux, Windows and macOS with POP3, IMAP and SMTP support, junk mail filtering and GnuPG encryption.

Source: https://privacyratings.com/open-source/email-clients/