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icdiff vs ydiff: catalog facts
icdiff	ydiff
Free Free software distributed under a GPL-compatible license.	Free Free and open source under the BSD-3-Clause license.
Command line	Command line
Shows differences in a side-by-side terminal view Highlights changes within lines	Shows side-by-side or unified diffs Supports colored themes and automatic paging
Requires a terminal that can display color for colored highlighting.	Requires Python and the less pager
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: BSD-3-Clause
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 October 8, 2026	Official website Full listing and sources Checked October 8, 2026

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