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DiffMerge vs diffoscope: catalog facts
DiffMerge	diffoscope
Free Free to use under SourceGear's freeware license.	Free Free software licensed under GPL-3.0-or-later.
Windows, macOS, Linux	Web, Command line
Two-way diff and three-way merge with editable panes Side-by-side folder comparison	Recursively unpacks many archive types for comparison Supports a broad range of binary and document formats
Closed source freeware Infrequent updates	Meaningful results for some formats may require additional tools or Python modules
Downloadable app	Downloadable app, Web application
Closed source	Open source
License: Freeware	License: GPL-3.0-or-later
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 8, 2026

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