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Kompare vs KDiff3: catalog facts
Kompare	KDiff3
Free Free and open source under the GPL 2.0 or later.	Free Free and open source under the GPL v2 or later.
Linux	Windows, macOS, Linux
Compares files and whole folders recursively Creates and applies patches	Compares and merges files and whole directories Three-way merge for resolving version control conflicts
Linux only Two-way comparison rather than three-way merge	Interface looks dated next to newer diff tools Focused on text; no rich comparison of binary formats
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License: GPL-2.0-or-later
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.