Kontact vs Postbox : Which is Better?

Kontact

Kontact is a personal information manager and groupware software suite developed by KDE. It supports calendars, contacts, notes, to-do lists, news, and email. Developed by KDE

License: Open Source

Categories: News & Books Office & Productivity

Apps available for Windows Linux

Postbox

Postbox is powerful, intuitive, ultra-customizable, speedy task manager. Developed by Postbox, Inc.

License: Commercial

Categories: Office & Productivity

Apps available for Mac OS X Windows

Kontact VS Postbox Feature comparision

Feature	Kontact	Postbox
Contacts
Convert Email to Task
Feed Reader
Material design
Data export/import
IFTTT integration
Reminder for deadlines
Address book integration
Built-in Calendar
Calendar integration
Exchange
Automatic Backup
Built-in themes
Built-in translation
Category filters
Cloud sync
Sync Contacts
Bundled with macOS
CalDAV
CardDAV
Encrypted Email
Gantt-charts
Kanban boards
Work Item Tracking
Agile boards
Multiple Account support
Box.com integration
Built-in RSS reader
Command line
Command line interface
Support for IMAP
POP3 Support
Clean design
Automatic Duplicate Merge
Cloud based
Multiple languages
Dropbox integration
Extensible by Plugins/Extensions
Onedrive integration
Tabbed interface
Visual Programming
Unified search
Quick switching using hotkeys
Unified inbox
Encryption
Customizable
Email tracking
Sync across Devices
Undo send
Asana integration
Lightweight
Content Filtering