Head to head
| Delve | WhatSize | |
|---|---|---|
| Visualization | Mixed | List |
| Platform | macOS | macOS |
| Pricing | Paid Paid one-time purchase (around $5 at time of writing) | Paid Paid one-time license (around $15 at time of writing) |
| Open source | No | No |
| Native Mac | Yes | Yes |
Updated September 2026 · Prices change — please verify with the vendor.
Delve
An honest APFS-aware treemap plus sunburst with collector cleanup.
＋ Delve: Strengths
- Both treemap and sunburst views with APFS-aware measurement
- Collector tray stages deletions before they happen
- Honest marketing about what can and can't be reclaimed
－ Delve: Weaknesses
- Newer entrant — fewer reviews and community resources
- macOS only, no Windows or mobile companion
- Smaller feature surface than all-in-one suites
Read the review: Delve → · Delve See alternatives →
WhatSize
A fast measuring sorter with column views and cleanup tools.
＋ WhatSize: Strengths
- Deep measuring with column, outline, and chart views
- Finds large, duplicate, and orphaned files beyond simple sizes
- Appeals to power users who live in column browsers
－ WhatSize: Weaknesses
- Dense, technical UI with a real learning curve
- Paid license with no free tier for casual use
- Visualization is secondary to tables and lists
Read the review: WhatSize → · WhatSize See alternatives →
Verdict: Delve vs WhatSize
Choose Delve if you want mixed visualization on macOS. Choose WhatSize if you prefer list 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, Delve or WhatSize?
Delve wins on mixed visualization for macOS; WhatSize wins on list views for macOS. On price, Paid (Delve) vs Paid (WhatSize). 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 Delve or WhatSize wins on price.