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KDiff3SmartSynchronize
Free

Free and open source under the GPL v2 or later.

 Paid

Prices are not listed on the product page; licensing details are on the syntevo site.

Windows, macOS, Linux Windows, macOS, Linux
  • Compares and merges files and whole directories
  • Three-way merge for resolving version control conflicts
  • Editable file compare with inner-line change detection
  • 3-way merge with all three files editable
  • Interface looks dated next to newer diff tools
  • Focused on text; no rich comparison of binary formats
  • Pricing is not shown on the product page
  • Focused on text files and project trees rather than general backup
Downloadable app Downloadable app
Open source Closed source
License: GPL-2.0-or-later License not stated
No account needed Not stated if an account is needed
Works offline Works offline

Checked October 1, 2026

Checked October 2, 2026

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