Feature comparison

Nektony Disk Space Analyzer vs NullDisk

A sunburst analyzer for large files, folders, and mounted storage. Native Mac disk maps with SSH/cloud sources, development cleanup, and a separate CLI. See how their platforms, views, and cleanup workflows fit the way you work.

Sunburst / MixedFreemium / Free

Which fits your needs?

Nektony Disk Space Analyzer: Mac users who want a sunburst and integrated file-management actions.

NullDisk: Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports.

Features, pricing, and workflow

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FeatureNektony Disk Space AnalyzerNullDisk
Best fitMac users who want a sunburst and integrated file-management actions.Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports.
VisualizationSunburst, directories, and largest-items listRadial map, treemap, and file list; CLI terminal treemap
Platforms and requirementsmacOSMac app: macOS 14+; CLI: macOS, Linux, Windows
Pricing and editionsFree download; verify the selected store edition and its in-app purchase terms.Direct Mac edition free with reminders; optional $9.99 one-time personal license or team seat removes reminders. App Store terms are separate.
Open sourceNoNo
Native macOS UIYesYes
Cleanup workflowManage selected items with copy, move, and removal actions; check edition-specific availability.Review source and action: local Trash, explicit permanent removal, or backup/delete; remote and cloud actions depend on the destination.
Reports and portabilityThe overview does not establish a portable report format. Keep paths and the selected scan scope before comparing results in NullDisk.CLI produces JSON/NDJSON scan reports. Third-party scan files are not directly imported into the Mac GUI.

Nektony Disk Space Analyzer: what stands out

A good fit for Mac users who want a sunburst and integrated file-management actions.

Nektony Disk Space Analyzer: strengths

  • Sunburst and largest-items browsing
  • Copy, move, or remove selected files
  • Supports external volumes and accessible cloud-storage folders

Considerations

  • Standard and Pro have separate store listings
  • Check which actions require a purchase in the selected edition
  • Mounted cloud folders do not necessarily represent an entire provider account

Full product guide → · Alternatives →

NullDisk: what stands out

A good fit for Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports.

NullDisk: strengths

  • Radial and treemap views with local, SSH, and cloud sources
  • Git-aware development cleanup for generated output and eligible worktrees
  • Native Mac UI plus terminal UI and JSON/NDJSON CLI reports

Considerations

  • Desktop GUI requires macOS 14+; Linux/Windows use the separate CLI
  • Mac app sends anonymous usage telemetry; no in-app opt-out at this review
  • No content-based duplicate finder; allocated bytes are not a guaranteed recovery total

NullDisk features →

For a useful comparison on your own drive, match the scan root, access permissions, and size mode. Chart style changes how you explore the results; it does not by itself establish measurement accuracy.

Common questions

When should I choose Nektony Disk Space Analyzer?

A good fit for Mac users who want a sunburst and integrated file-management actions. Free download; verify the selected store edition and its in-app purchase terms.

When should I choose NullDisk?

A good fit for Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports. Direct Mac edition free with reminders; optional $9.99 one-time personal license or team seat removes reminders. App Store terms are separate.

Will both apps show the same size?

Not necessarily. Match the scan root, permissions, exclusions, and logical/allocated-size mode. Hard links, APFS clones, snapshots, sparse files, and cloud placeholders can change totals. A reported size is not a guaranteed amount recovered after deletion.

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