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 Linux, Windows, Mac, BSD and Android 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.
BlueMail is a modern, mobile first, powerful Email management tool with a sleek design, unified inbox and support for all your accounts: IMAP,Exchange,POP3.
Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).
Wino is a lightweight native mail client for Windows 10/11. It is still in active development. Main motivation for this project is to replace Mail & Calendar for Windows with modern Windows design without using web technologies for speed.
KMail is the email component of Kontact, the integrated personal information manager of KDE. Kontact is a personal information manager and groupware software suite for KDE. It supports calendars, contacts, notes, to-do lists, news, and email.
ElectronMail is an Electron-based unofficial desktop client for ProtonMail and Tutanota end-to-end encrypted email providers. The app aims to provide enhanced desktop user experience enabling features that are not supported by the official in-browser web clients.
Shortwave is an email app that takes the pain out of managing your inbox, making it effortless to stay organized, productive, and responsive.
Mutt is a small but very powerful text-based mail client for Unix operating systems. Some of its features are: color support, message threading, MIME support (including RFC2047 support for encoded headers), PGP/MIME (RFC2015), various features to support mailing lists, including...
Foxmail is a free POP3 and IMAP4 e-mail client in English and Chinese for Windows systems.
aerc is an email client that runs in your terminal. It's highly efficient and extensible, perfect for the discerning hacker.
Hamsket is a fork of Rambox that was started when Rambox moved from being totally free to a "freemium" model.
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