NullDisk our pick
A native macOS disk-space analyzer with an interactive radial map. Native SwiftUI, allocated-size honesty, staged Trash-based removal, zero data collection.
Top 5 GrandPerspective alternatives
Disk Inventory X
The classic treemap visualizer, revived for Apple Silicon Macs.
Klarity Disk
A private offline analyzer with treemaps and system monitoring.
DissectMac
A fast local treemap with uninstaller and live monitoring.
DiskPoint
Privacy-focused free cleanup with offline visualization.
Faccia a faccia: NullDisk vs GrandPerspective
| NullDisk | GrandPerspective | |
|---|---|---|
| Visualization | Sunburst radial map | Treemap |
| Platform | macOS 14+ | macOS |
| Pricing | Paid | Open source |
| Open source | No (offline, zero-data) | Yes |
| Cleanup flow | Staged collector → Trash | Varies by tool |
L'essenziale: GrandPerspective
| GrandPerspective | |
|---|---|
| Vendor | Erwin Bonsma |
| Platform | macOS |
| Pricing | Open source — Free and open source (GPL); small App Store fee for the packaged build |
| Visualization | Treemap |
| Open source | Yes |
Aggiornato a settembre 2026 · I prezzi cambiano — verifica presso il fornitore. Prezzo al lancio: Free and open source (GPL); small App Store fee for the packaged build.
NullDisk fa per te se …
- A radial sunburst map instead of lists or treemaps — see usage at a glance and drill in with a click.
- A staged removal collector: queue suspects, review, then Trash everything together.
- Allocated-size measurement with hard-link dedup, so reclaimed space matches reality.
Pros & cons
＋ Punti di forza
- Free and open source with a tiny footprint
- Treemap rectangles make the single biggest space hog obvious
- Fast rescans and a loyal power-user community
－ Debolezze
- Treemap UI is utilitarian — no sunburst, no guided cleanup
- No collector tray or duplicate finder; deletion is file-by-file
- Development pace is slow compared with commercial rivals
Domande frequenti
What is the best alternative to GrandPerspective for Mac?
For most Mac users it's NullDisk: native SwiftUI, a radial sunburst map, a staged removal collector, and zero data collection. GrandPerspective users who want treemap views and open source pricing will feel at home within minutes.
Is there a free alternative to GrandPerspective?
Yes — GrandPerspective and Disk Inventory X are free and open source with genuine treemap analysis. They lack NullDisk's collector workflow and sunburst map, but they find the biggest hogs fast.
How do I switch from GrandPerspective to NullDisk?
Note the largest folders GrandPerspective flagged, then run the same scan in NullDisk and rebuild the cleanup in its removal collector. The full walkthrough is on our switching guide.
In breve
GrandPerspective is a fine free tool for treemap fans on macOS. But if you want the whole job — see, stage, and safely remove — done natively on a modern Mac, NullDisk is the upgrade. Guida al passaggio →