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khardGNOME Contacts
Free

Free and open source.

 Free

Free and open source under the GPL-2.0-or-later licence.

macOS, Linux, Command line Linux
  • Works on plain vCard files
  • Fits terminal mail setups
  • Combines contacts from several sources in one view
  • Links entries for the same person automatically
  • No built-in sync; needs a separate CardDAV tool
  • Command line only
  • Linux only
  • Built around GNOME and its online accounts
Downloadable app Downloadable app
Open source Open source
License not stated License: GPL-2.0-or-later
No account needed No account needed
Works offline Works offline

Checked October 2, 2026

Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.