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IMatch vs KPhotoAlbum: catalog facts
IMatch	KPhotoAlbum
Paid Commercial software sold by photools.com.	Free Free KDE community software.
Windows	Linux
Standard-compliant metadata management Catalogs RAW, video, audio, PDF and Office files	Fast tagging workflow for large batches of photos Searches combine people, places and custom categories
Windows only Paid software	Organizes photos rather than editing them Tagging a large archive still takes up-front effort
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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