Head to head
| GrandPerspective | SpaceLens | |
|---|---|---|
| Visualization | Treemap | Mixed |
| Platform | macOS | macOS |
| Pricing | Open source Free and open source (GPL); small App Store fee for the packaged build | Paid Available via CleanMyMac subscription or one-time license |
| Open source | Yes | No |
| Native Mac | Yes | Yes |
Updated September 2026 · Prices change — please verify with the vendor.
GrandPerspective
The tiny open-source treemap that shows your biggest files instantly.
＋ GrandPerspective: Strengths
- 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
－ GrandPerspective: Weaknesses
- 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
Read the review: GrandPerspective → · GrandPerspective See alternatives →
SpaceLens
A bubble-map storage explorer inside the CleanMyMac suite.
＋ SpaceLens: Strengths
- Beautiful bubble-map view distinct from sunbursts and treemaps
- One click from analysis to automated cleanup inside the suite
- Backed by MacPaw's large support and update operation
－ SpaceLens: Weaknesses
- Requires the full CleanMyMac suite — no standalone purchase
- Subscription push where single-purpose rivals charge once
- Suite scope means deeper scans can feel like an upsell path
Read the review: SpaceLens → · SpaceLens See alternatives →
Verdict: GrandPerspective vs SpaceLens
Choose GrandPerspective if you want treemap visualization with open-source transparency on macOS. Choose SpaceLens if you prefer mixed views at paid 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, GrandPerspective or SpaceLens?
GrandPerspective wins on treemap visualization for macOS; SpaceLens wins on mixed views for macOS. On price, Open source (GrandPerspective) vs Paid (SpaceLens). 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 GrandPerspective or SpaceLens wins on price.