SeaMonkey
Open Source
SeaMonkey is a free and open-source Internet suite.
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.
Rambox
Open Source
Rambox is a free and Open Source messaging and emailing app that combines common web applications into one.
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 Thunderbird with alternatives
Compare SeaMonkey and Thunderbird and decide which is most suitable for you.
Compare Evolution and Thunderbird and decide which is most suitable for you.
Compare Mailspring and Thunderbird and decide which is most suitable for you.
Compare Claws Mail and Thunderbird and decide which is most suitable for you.
Compare Sylpheed and Thunderbird and decide which is most suitable for you.
Compare Zimbra Desktop and Thunderbird and decide which is most suitable for you.
Compare Kontact - KMail and Thunderbird and decide which is most suitable for you.