KAddressBook is an address book manager. It stores all the personal details of your family, friends and other contacts.
This tool supports a wide variety of services, including NextCloud, Kolab, Google Contacts, Microsoft Exchange (EWS) or any standard CalDAV server.
This is free and open source software.
Key Features
- Powerful search – KAddressBook has configurable filters and powerful search capabilities.
- Duplicate detection and merging – KAddressBook can find duplicated contacts from multiple sources and can merge them into a single contact.
- Good standard support – KAddressBook can import and export from and to nearly every address book standard.
- LDAP integration – Can connect to multiple LDAP servers, which can then be used for contact autocompletion when composing emails in KMail.
- Integration – Integrates with other Kontact components, e.g. exporting birthday reminders to KOrganizer.
- QR codes – KAddressBook can display a QR code for each contact to quickly scan it into your phone or send to someone.
Website: apps.kde.org/kaddressbook
Support: Code Repository
Developer: Laurent Montel
License: GNU General Public License v2.0 or later

KAddressBook is written in C++. Learn C++ with our recommended free books and free tutorials.
Related Software
| Address Book Managers | |
|---|---|
| KAddressBook | Supports a wide range of services including NextCloud, Google Contacts |
| Contacts | GNOME's integrated address book. It is written in Vala and uses libfolks |
| qcard | CLI addressbook application for CardDAV servers |
| khard | Console vcard client |
| CardBook | Thunderbird address book based on CardDAV and vCard standards |
| aercbook | Minimalist address book for the aerc e-mail client |
| addrb | Lightweight, read-only command-line address book |
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