Head to head
| Klarity Disk | Space Radar | |
|---|---|---|
| Visualization | Treemap | Mixed |
| Platform | macOS | macOS + Windows + Linux |
| Pricing | Paid Paid one-time purchase (around $7 at time of writing) | Open source Free and open source (MIT) |
| Open source | No | Yes |
| Native Mac | Yes | No |
Updated September 2026 · Prices change — please verify with the vendor.
Klarity Disk
A private offline analyzer with treemaps and system monitoring.
＋ Klarity Disk: Strengths
- Fully offline analysis with a no-telemetry privacy stance
- Treemap plus icicle views and a system monitor in one app
- One-time price with no subscription
－ Klarity Disk: Weaknesses
- Treemap-first; no sunburst option for radial-map fans
- Smaller vendor with less social proof than category leaders
- Monitoring extras may duplicate tools you already own
Read the review: Klarity Disk → · Klarity Disk See alternatives →
Space Radar
Sunburst, treemap, and flamegraph views for disk nerds.
＋ Space Radar: Strengths
- Three visualizations including a rare flamegraph view
- Free and MIT-licensed for tinkering
- Web-tech stack runs anywhere
－ Space Radar: Weaknesses
- Experimental project, not a supported product
- No deletion workflow — visualization only
- Requires comfort with GitHub releases and rough edges
Read the review: Space Radar → · Space Radar See alternatives →
Verdict: Klarity Disk vs Space Radar
Choose Klarity Disk if you want treemap visualization on macOS. Choose Space Radar if you prefer mixed views for free on macOS + Windows + Linux. 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, Klarity Disk or Space Radar?
Klarity Disk wins on treemap visualization for macOS; Space Radar wins on mixed views for macOS + Windows + Linux. On price, Paid (Klarity Disk) vs Open source (Space Radar). 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 Klarity Disk or Space Radar wins on price.