Microsoft Office Outlook
Commercial
Microsoft Outlook is a personal information manager from Microsoft.
Postbox
Commercial
Postbox is powerful, intuitive, ultra-customizable, speedy task manager.
Rainlendar
Freemium
Rainlendar is a calendar program for Windows, Mac OS X and Linux.
Sylpheed
Open Source
Sylpheed is an open-source e-mail client and news client licensed under the GPL.
Fantastical
Commercial
Fantastical is the calendar app for Mac.
OpenProject
Open Source
OpenProject is a web-based project management system for location-independent team collaboration.
Contacts
Commercial
Contacts is a default contacts management app for Mac based operating systems.
MailMate
Commercial
MailMate is an IMAP email client for macOS featuring extensive keyboard control, Markdown integrated email composition, advanced search conditions.
Apple Mail
Free
Apple Mail is an email client included with the operating systems macOS, iOS and watchOS by Apple Inc.
Apple Calendar
Free
Calendar is a personal calendar application made by Apple Inc. that runs on both the macOS desktop operating system and iOS mobile operating system.
Airmail
Commercial
Airmail is a fast mail client for Mac and iPhone.
Mutt
Open Source
Mutt is a text-based email client for Unix-like systems.
Zimbra Desktop
Free Personal
Zimbra Desktop is an offline client that lets you manage various email accounts in one desktop tool.
Memotoo
Commercial
Memotoo sync all your contacts from Gmail, Facebook, phone, Thunderbird, Outlook, etc in a single address book.
Polymail
Freemium
Polymail is an email application for OS X and iOS known for its clean interface and additional features atop the Gmail platform.
Compare Kontact with alternatives
Compare Microsoft Office Outlook and Kontact and decide which is most suitable for you.
Compare Apple Calendar and Kontact and decide which is most suitable for you.
Compare Fantastical and Kontact and decide which is most suitable for you.
Compare Zimbra Desktop and Kontact and decide which is most suitable for you.
Compare OpenProject and Kontact and decide which is most suitable for you.