KAddressBook review
A free Linux contact manager with KDE integrations and address-book syncing.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
KAddressBook is a desktop contact manager for keeping personal details about family, friends, and other contacts. It is a fit for Linux users who want an address book within KDE’s Kontact ecosystem, rather than a cross-platform contact-management service. The software is open source and has a free plan, making it suited to solo users seeking a local desktop tool connected to compatible contact services.
Its core workflow covers searching and configurable filters, duplicate detection and merging across multiple sources, and import and export of address-book standards. KAddressBook can connect to multiple LDAP servers to provide contact autocompletion in KMail. It also displays a QR code for each contact and can pass birthday reminders to KOrganizer. These features make it more useful as part of a KDE desktop setup than as a standalone directory for teams.
Connections include Nextcloud, Kolab, Google Contacts, Microsoft Exchange (EWS), and standard CalDAV servers. That breadth can help Linux users consolidate contacts from supported services, while the platform fit remains narrow: the listed availability is Linux desktop, and support is community-based. Choose KAddressBook if you want a free, open-source address book with KDE integration and contact syncing. Consider an alternative if you need broader platform coverage or a contact-management service beyond a personal desktop address book.
KAddressBook pros and cons
- Where it wins
- Find contacts with search and configurable filters.
- Detect and merge duplicate contacts across sources.
- Supports Nextcloud, CalDAV, LDAP, and other contact services.
- Where it doesn't
- Linux desktop availability limits platform reach.
- Its focus is personal contacts rather than broader contact management.
- Support is community-based.
KAddressBook fact sheet, pricing and score →
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