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DaisyDisk vs GrandPerspective: catalog facts
DaisyDisk	GrandPerspective
Paid A one-time purchase is required. The software is closed source.	Free Free and open source under the GPL.
macOS	macOS
Collect files into a holding area and delete them in one confirmed step Fast scans with a genuinely pleasant interface	Saved scans can be compared to see what grew since last time Deletes or reveals a file straight from the map
Paid application, macOS only	macOS only, and the interface is deliberately plain
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
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 September 22, 2026

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