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Difftastic vs Codiff: catalog facts
Difftastic	Codiff
Free The open-source application is available without a license fee.	Free Free and open source under the MIT licence.
Windows, macOS, Linux	Windows
Syntax-aware comparisons across many languages	Focused on quickly viewing local diffs Includes skill files for AI coding agents
It can use substantial memory and does not produce applicable patches.	Young project with no published GitHub releases Documentation of features and platforms is limited
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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