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Sifty vs MangoDisk: catalog facts
Sifty	MangoDisk
Free Free and open source under the MIT licence.	Free Free and open source.
Windows, Command line	Windows, macOS
Dry-run by default with a preview before deleting Deletes only to the Recycle Bin, with undo	Finds developer caches and build artifacts as well as system junk Risk levels shown for cleanable items
Windows 10 and 11 only Terminal interface, no graphical window	Cleaning tools can remove data you still need, so review selections AI explanations are an optional extra rather than core functionality
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License not stated
No account needed	No account 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.