Head to head
| Disk Inventory X | SpacePeek | |
|---|---|---|
| Visualization | Treemap | List |
| Platform | macOS | macOS |
| Pricing | Open source Free and open source; community Xs/Y builds target Apple Silicon | Freemium Free tier; Pro is a cheap one-time unlock |
| Open source | Yes | No |
| Native Mac | Yes | Yes |
Updated September 2026 · Prices change — please verify with the vendor.
Disk Inventory X
The classic treemap visualizer, revived for Apple Silicon Macs.
＋ Disk Inventory X: Strengths
- Free and open source with decades of trust
- Treemap plus file-type breakdowns in one window
- Community revival builds run natively on Apple Silicon
－ Disk Inventory X: Weaknesses
- Interface shows its age despite the revival builds
- No collector tray, previews, or modern sandbox handling
- Fork landscape (X vs Xs vs Y) can confuse new users
Read the review: Disk Inventory X → · Disk Inventory X See alternatives →
SpacePeek
A read-only Quick Look inspector for folders and archives.
＋ SpacePeek: Strengths
- Read-only by design — it cannot delete anything, so it's extra safe
- Peeks inside folders and archives with Finder-style Quick Look
- Very cheap Pro unlock
－ SpacePeek: Weaknesses
- Read-only means no cleanup workflow at all
- No sunburst or treemap overview of a whole drive
- Niche tool, not a full disk analyzer
Read the review: SpacePeek → · SpacePeek See alternatives →
Verdict: Disk Inventory X vs SpacePeek
Choose Disk Inventory X if you want treemap visualization with open-source transparency on macOS. Choose SpacePeek if you prefer list views at freemium pricing on macOS. And if you want a native Mac sunburst with a staged collector and zero telemetry, NullDisk is the third option that beats both on workflow.
Frequently asked questions
Which is better, Disk Inventory X or SpacePeek?
Disk Inventory X wins on treemap visualization for macOS; SpacePeek wins on list views for macOS. On price, Open source (Disk Inventory X) vs Freemium (SpacePeek). The honest answer depends on your OS and whether you prefer maps or lists — read the verdict below.
Is there something better than both?
If you want a native Mac sunburst with allocated-size honesty, a staged removal collector, and zero data collection, NullDisk beats both on workflow — even where Disk Inventory X or SpacePeek wins on price.