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GNOME Contacts vs vCard Studio: catalog facts
GNOME Contacts	vCard Studio
Free Free and open source under the GPL-2.0-or-later licence.	Free Free, released under CC0-1.0.
Linux	Windows, Linux
Combines contacts from several sources in one view Links entries for the same person automatically	Merge, split and deduplicate vCard files Wide range of import and export formats
Linux only Built around GNOME and its online accounts	Releases are infrequent; latest is 1.5.0 from 2024 No macOS or mobile versions
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0-or-later	License: CC0-1.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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