Compare software

Diffinity vs KDiff3: catalog facts
Diffinity	KDiff3
Best for: Windows users reviewing and merging text or source code changes	Best for: Developers who need a free visual diff and merge tool for Git conflicts
Free Freeware.	Free Free and open source under the GPL v2 or later.
Windows	Windows, macOS, Linux
Highlights changed lines, words, and characters Compares folders as well as text files All 3 strengths for Diffinity Highlights changed lines, words, and characters Compares folders as well as text files Supports syntax highlighting and portable use	Compares and merges files and whole directories Three-way merge for resolving version control conflicts All 3 strengths for KDiff3 Compares and merges files and whole directories Three-way merge for resolving version control conflicts Free and open source from the KDE community
Windows only Requires the .NET 8 runtime	Interface looks dated next to newer diff tools Focused on text; no rich comparison of binary formats
Downloadable app	Downloadable app
Not open source	Open source
License not stated	License: GPL-2.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Offline features available
Official website Full listing and sources Sources for Diffinity truehumandesign.se/s_diffinity.php Catalog checked October 8, 2026	Official website Full listing and sources Sources for KDiff3 invent.kde.org/sdk/kdiff3 Catalog checked October 1, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.