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TagStudio vs KPhotoAlbum: catalog facts
TagStudio	KPhotoAlbum
Free Free and open source with no paid tier.	Free Free KDE community software.
Windows, macOS, Linux	Linux
Tag-based organization on top of your existing files Does not lock files into a proprietary format	Fast tagging workflow for large batches of photos Searches combine people, places and custom categories
Still evolving, so features and library format may change Organizing a large collection with tags takes manual effort	Organizes photos rather than editing them Tagging a large archive still takes up-front effort
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
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 September 24, 2026

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