Thunderbird
Open Source
Thunderbird is a open source mail client developed and maintained by Mozilla foundation.
Mailspring
Freemium
Mailspring is a multi-platform email client.
Geary
Open Source
Geary is an email application built around conversations, for the GNOME 3 desktop. It allows you to read, find and send email.
Mutt
Open Source
Mutt is a text-based email client for Unix-like systems.
OpenProject
Open Source
OpenProject is a web-based project management system for location-independent team collaboration.
Kontact
Open Source
Kontact is a personal information manager and groupware software suite developed by KDE. It supports calendars, contacts, notes, to-do lists, news, and email.
Evolution
Open Source
Evolution is the official personal information manager for GNOME.
Claws Mail
Open Source
Claws Mail is a free and open-source, GTK+-based email and news client. It offers easy configuration and an abundance of features.
Sylpheed
Open Source
Sylpheed is an open-source e-mail client and news client licensed under the GPL.
Zimbra Desktop
Free Personal
Zimbra Desktop is an offline client that lets you manage various email accounts in one desktop tool.
Kontact - KMail
Open Source
KMail is the email component of Kontact, the integrated personal information manager from KDE.
Compare Postbox with alternatives
Compare Thunderbird and Postbox and decide which is most suitable for you.
Compare Zimbra Desktop and Postbox and decide which is most suitable for you.
Compare OpenProject and Postbox and decide which is most suitable for you.
Compare Kontact - KMail and Postbox and decide which is most suitable for you.