Choose by workflow
A Mac treemap and sunburst with logical/allocated sizes and a collector. If you need something different, compare these five options by the job they do. Choose by platform, features, and how you prefer to review files.
Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports.
Mac users who favor column browsing and integrated duplicate/cleanup tools.
People who want saved storage history or a companion on iPhone/iPad.
Mac users who prefer rectangular views and age-based browsing.
Mac users seeking free storage analysis alongside broader maintenance tools.
Scroll across to compare
| Feature | Delve | NullDisk |
|---|---|---|
| Best fit | Apple Silicon users on macOS 26+ who want two maps and staged cleanup. | Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports. |
| Visualization | Treemap, sunburst, and file list | Radial map, treemap, and file list; CLI terminal treemap |
| Platforms and requirements | macOS 26+, Apple Silicon | Mac app: macOS 14+; CLI: macOS, Linux, Windows |
| Pricing and editions | Vendor lists $4.99 once after a 14-day trial. | Direct Mac edition free with reminders; optional $9.99 one-time personal license or team seat removes reminders. App Store terms are separate. |
| Open source | No | No |
| Native macOS UI | Yes | Yes |
| Cleanup workflow | Stage items in the Collector, then send the reviewed batch to Trash. | Review source and action: local Trash, explicit permanent removal, or backup/delete; remote and cloud actions depend on the destination. |
| Reports and portability | The developer documents exporting maps as posters with Command-Shift-E. Keep that image as a reference; it is not a scan file that NullDisk can import. | CLI produces JSON/NDJSON scan reports. Third-party scan files are not directly imported into the Mac GUI. |
The developer documents exporting maps as posters with Command-Shift-E. Keep that image as a reference; it is not a scan file that NullDisk can import.
Apple Silicon users on macOS 26+ who want two maps and staged cleanup. Keep it if that matches your needs. Consider a change for a specific requirement such as a different chart, remote sources, report exports, or development cleanup.
GrandPerspective and SquirrelDisk offer free open-source analysis. OmniDiskSweeper is free on Mac. All direct Mac features in NullDisk are free with reminders; reminder removal is optional. Freeware does not necessarily mean open source.
No. Keep any historical exports you need and run a fresh scan of the same location. NullDisk does not import these apps’ saved scans or cleanup queues.