Thunderbird
Open Source
Thunderbird is a open source mail client developed and maintained by Mozilla foundation.
Mailbird
Freemium
Mailbird is a desktop email client for Windows 7, 8 and 10.
Mailspring
Freemium
Mailspring is a multi-platform email client.
EssentialPIM
Freemium
EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries, e…
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.
Microsoft Mail and Calendar apps help you stay up to date on your email, manage your schedule and stay in touch with people you care about the most.
Microsoft Office Outlook
Commercial
Microsoft Outlook is a personal information manager from Microsoft.
eM Client
Free Personal
eM Client is a Windows based e-mail client for sending and receiving e-mails, managing calendars, contacts, and tasks.
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.
The Bat
Commercial
The Bat! is an email program for Windows that protects the correspondence and empowers the users to handle large amounts of emails quickly and efficiently.
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.
Compare Postbox with alternatives
Compare Thunderbird and Postbox and decide which is most suitable for you.
Compare Microsoft Office Outlook and Postbox and decide which is most suitable for you.
Compare EssentialPIM 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.
Compare Microsoft Mail and Calendar and Postbox and decide which is most suitable for you.