Diskzy vs Disk Space Analyzer: an honest comparison
Disk Space Analyzer from Nektony, also known as Disk Expert, is a storage analyzer for the Mac. Its site describes a sunburst diagram, a folder treemap and a list of the biggest files, with the option to copy, move or remove what you select. It scans the startup disk or single folders, external drives, mounted disk images and cloud storage such as Dropbox and Google Drive, flags large, old and unused files, and can display and clear purgeable space. Pricing is shown from $4.95 a month, with a 2-day trial.
Diskzy maps the startup disk and is built around what comes next. It breaks System Data into named parts, lists caches, logs, Xcode leftovers and build folders with a reason for each item, and uninstalls apps with their leftovers. It does not scan cloud storage and does not delete local snapshots, which it marks Managed by macOS. You pay once.
| Diskzy | Disk Space Analyzer | |
|---|---|---|
| Price | Free for 72 hours with everything unlocked, then $9 once for 2 Macs. No subscription. | Its site shows pricing from $4.95 a month. Other tiers are not stated on the product page. |
| Trial | 72 hours with everything unlocked. | 2-day trial, downloaded from the Mac App Store. |
| Disk map | Maps the whole disk, with search by name, kind, size or age. | Sunburst diagram, folder treemap and a list of the biggest files. |
| What it scans | The whole startup disk. | The startup disk or single folders, external and removable drives, mounted disk images and cloud storage such as Dropbox and Google Drive. |
| System Data | Breaks System Data into named parts, each sized and marked Safe to clear, Look first or Managed by macOS. | Not stated. Its site says it detects hidden items such as app logs, caches and browser data. |
| Cleanup suggestions | Clean up tab lists caches, logs, Xcode leftovers, project build folders, package-manager caches and old installers, each ticked or unticked with a reason. | Flags large, old and unused files, and lets you copy, move or remove selected items. |
| Purgeable space | Local snapshots appear under System Data marked Managed by macOS. Diskzy does not delete them. | Displays and clears purgeable space. |
| App uninstaller | Yes, with leftovers. | Not stated |
| Where deleted files go | The Trash. Nothing is gone until you empty it. | Not stated |
| Requirements | macOS 15 Sequoia or later, Apple silicon and Intel. | macOS 11.0 to 27. |
When Disk Space Analyzer is the better choice
Choose Disk Space Analyzer if you need to analyze external drives or cloud storage, want to move files to another drive from the same window, want to clear purgeable space, or run macOS 11 to 14.
When Diskzy is the better choice
Choose Diskzy if you want System Data explained, a cleanup list with a reason for each item, an uninstaller, and a single payment instead of a monthly price.
Details about Disk Space Analyzer were checked on October 10, 2026 against nektony.com. Prices and features change; check their site for the latest.
Other comparisons
- Diskzy vs DaisyDisk
- Diskzy vs CleanMyMac
- Diskzy vs GrandPerspective
- Diskzy vs OmniDiskSweeper
- Diskzy vs AppCleaner
- Diskzy vs Mole
- Diskzy vs Disk Inventory X
- Diskzy vs DevCleaner for Xcode
- Diskzy vs Sensei
- Diskzy vs MacKeeper
- Diskzy vs OnyX
- Diskzy vs macOS Storage settings
- Diskzy vs BuhoCleaner
- Diskzy vs MacCleaner Pro
- Diskzy vs WhatSize
- Diskzy vs ncdu
- Diskzy vs Cleaner One Pro
- Diskzy vs Pearcleaner
- Diskzy vs App Cleaner & Uninstaller
See where your Mac's space went
Diskzy maps your disk, explains System Data and clears what's safe. Free for 72 hours, then $9 once for 2 Macs.
Try Diskzy for free