Hamsket is a fork of Rambox that was started when Rambox moved from being totally free to a "freemium" model.

Betterbird is described as 'Open-source client enhancing Thunderbird with more features and bug fixes. Offers security patches and multi-row descriptions like Outlook' and is a popular Email Client in the office & productivity category. There are more than 25 alternatives to Betterbird for a variety of platforms, including Windows, Linux, Mac, Android and BSD apps. The best Betterbird alternative is Thunderbird, which is both free and Open Source. Other great apps like Betterbird are K-9 Mail, Evolution, Microsoft Outlook and SeaMonkey.
Hamsket is a fork of Rambox that was started when Rambox moved from being totally free to a "freemium" model.





Eclipse Mail is a fork of Interlink Mail and News made for Windows XP and runs on IA-32 i686 platforms. Some advantages over upstream and roytam1's mailnews are more optimizations and better interoperability with upstream.



Modern open-source email client supporting unified inbox, IMAP/SMTP, Gmail and Outlook with OAuth2, conversation threading, rich text TipTap composing, CardDAV contact sync, tracking removal, dark mode, color themes, vim-style shortcuts, and a detachable window.

mu is a tool for dealing with e-mail messages stored in the Maildir-format, on Unix-like systems. mu's main purpose is to help you to find the messages you need, quickly; in addition, it allows you to view messages, extract attachments, create new maildirs, …



Lightweight Windows taskbar app that shows unread email counts from all your Gmail and Microsoft 365 accounts, no browser or Outlook required.

