DaisyDisk vs SpaceSniffer (2026): which should you pick?

Pick DaisyDisk if

• Fits if your Mac keeps running out of disk space and you want to see why
• Works for people who want to pay once and cover up to 5 personal Macs

Look elsewhere if

• Skip it if you want a cleaner that decides for you, as it does no automatic cleaning
• Not for you if you need to find duplicate files, since it doesn't do that
• Tight if you plan to stay on the trial, because it can't delete files, show them in Finder or scan cloud storage
• Watch out: deletion is permanent, not a move to the Trash, so a wrong pick is gone for good
• Watch out: the App Store edition can't scan as administrator or purge hidden space, and there's no Windows or iOS version

Pick SpaceSniffer if

• Fits if you want to see at a glance which folders are using your disk
• Works for people who prefer a portable program with typed filters

Look elsewhere if

• Skip it if you use a Mac or Linux, as no other platform is named
• Too light for you if you want it to clean up junk, since it only reports
• Watch out: the site lists no system requirements
• Watch out: downloads are linked through a mirror called dAppCDN, not hosted on the vendor's own page

DaisyDisk

• macOS only; the current version needs macOS 10.13 or newer, and the FAQ says there is no Windows or iOS version.
• The free trial cannot delete files, show them in Finder, scan as administrator or scan cloud storage, and shows purchase reminders.
• The Mac App Store edition cannot scan as administrator and only detects hidden and purgeable space without revealing or purging it.
• It does not find duplicate files, and deletion is permanent, not a move to the Trash.

SpaceSniffer

• It analyzes and reports; the vendor's pages describe no cleanup or deletion tools beyond the Windows file menu.
• The vendor's pages are short and the site lists no system requirements; the Windows context menu support points to Windows only.
• Downloads are linked through a mirror called dAppCDN rather than hosted on the vendor's own page.

DaisyDisk

Sunburst disk map

Scans a disk or folder and draws its contents as a sunburst map that you browse to locate the largest files and folders.

Fast scanning

The vendor quotes 12-20 seconds for an APFS SSD startup disk and 6-12 seconds for an HFS+ one, and 3-5 minutes for NTFS, FAT and exFAT volumes.

Collector and deletion

Drag items to the Collector, review them, then click Delete, with 5 seconds to cancel. Files are removed permanently, and system folders are not accepted.

Hidden and purgeable space

Detects space that regular scanning cannot account for, reveals it by scanning as administrator, and can purge purgeable space and local snapshots.

Cloud scan

Connects Dropbox, Google Drive, Microsoft OneDrive and Box and scans them over the network like a local disk, without allocating local disk space.

Quick Look preview

Pressing Space previews any file with the built-in Quick Look, so you can identify it before deciding whether to delete it.

SpaceSniffer

Treemap view

Folders and files appear as blocks sized by how much space they use. One click opens a block for detail and a double click zooms to it.

Filter field

Type criteria such as *.jpg, >2years or a color tag to limit the view; a leading pipe excludes matches. Filters can be combined.

Color tags

Mark files red, yellow, green or blue with keyboard shortcuts to keep track of what was examined, and filter by tag.

Live scanning

You can navigate while the scan runs, and the view updates if the file system changes during a scan.

Export module

Produces text reports of the result, and the layout of the report can be customized.

DaisyDisk

• Lifetime License$9.99

  one-time purchase

  Stand-alone edition for up to 5 personal Macs. Minor updates and bug fixes are included, with a 30-day money-back guarantee.

• Mac App Store edition$9.99

  one-time purchase (US Mac App Store)

  Sandboxed edition without scanning as administrator. The vendor offers App Store customers free migration to the stand-alone license.

SpaceSniffer

• SpaceSniffer$0

  Freeware for personal and commercial use; donations are optional.

DaisyDisk

• Lifetime license

  Lifetime license with no subscription

  One payment buys a lifetime license with no recurring charges. Minor updates are included, and a paid major upgrade would not invalidate the license.

• Education

  Student discounts on request

  The pricing page says student discounts are offered and asks buyers to contact the vendor for details.

• Other savings

  Corporate and portable IT licenses

  Corporate licenses and portable licenses for IT services are available on request, according to the pricing page.

SpaceSniffer

No public discounts listed.