Compare software

KDiff3 vs Beyond Compare: catalog facts
KDiff3	Beyond Compare
Free Free and open source under the GPL v2 or later.	Paid Paid license with a free trial.
Windows, macOS, Linux	Windows, macOS, Linux
Compares and merges files and whole directories Three-way merge for resolving version control conflicts	Compares folders, text, images and tables Merges changes from two versions
Interface looks dated next to newer diff tools Focused on text; no rich comparison of binary formats	Paid after the trial Proprietary software
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0-or-later	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 23, 2026

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