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DiffMerge vs Codiff: catalog facts
DiffMerge	Codiff
Free Free to use under SourceGear's freeware license.	Free Free and open source under the MIT licence.
Windows, macOS, Linux	Windows
Two-way diff and three-way merge with editable panes Side-by-side folder comparison	Focused on quickly viewing local diffs Includes skill files for AI coding agents
Closed source freeware Infrequent updates	Young project with no published GitHub releases Documentation of features and platforms is limited
Downloadable app	Downloadable app
Closed source	Open source
License: Freeware	License: MIT
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 2, 2026

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