Head-to-head · Disk Space Analyzers
FolderSizes vs TreeLens
FolderSizes leads on 0 checks, TreeLens on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.
Our verdict
- Highest scoreFolderSizes · 7.9/10
- Free planboth
FolderSizes scores higher on our rubric for disk space analyzers: 7.9 against 3.5 out of 10; our editors rank them #9 and #53.
FolderSizes is the better fit for windows reporting and scheduled analysis. TreeLens is the better fit for windows users wanting portable open-source analysis.
- FolderSizes fits best
Windows reporting and scheduled analysis
- TreeLens fits best
Windows users wanting portable open-source analysis
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Side by side
| Feature | FolderSizes 7.9/10 Visit ↗ | TreeLens 3.5/10 Visit ↗ |
|---|---|---|
| At a glance | ||
| Editor score | 7.9 | 3.5 |
| Ranking | #9 in Disk Space Analyzers | #53 in Disk Space Analyzers |
| Best for | Windows reporting and scheduled analysis | Windows users wanting portable open-source analysis |
| Pricing model | Free plan + paid | Free |
| Starting price | $30 one-time | Free plan |
| Free plan | ✓ | ✓ |
| Free trial | — | — |
| Deployment | Desktop | Desktop |
| Platforms | Windows | Windows |
| Built for | Solo, Small business, Mid-market, Enterprise | Solo, Small business |
| Features FolderSizes 3/5 · TreeLens 3/5 | ||
| Treemap view | ✓ | ✓ |
| Application sizes | Not checked yet | Not checked yet |
| File-type breakdown | ✓ | ✓ |
| External drive scans | Not checked yet | Not checked yet |
| Exportable reports | ✓ | ✓ |
| Specs | ||
| Desktop platforms | Windows | windows |
| Scan scope | Files_folders | Files_folders |
| Our review | ||
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| Our verdict | FolderSizes is a Windows disk space analyzer for individuals, consultants, businesses, and IT administrators. It scans local drives, folders, network paths, mapped and UNC locations, and external drives, then reports folder and file sizes… Read the review → |
TreeLens is a free, open-source Windows desktop utility for examining local storage usage. It scans folders and drives through parallel directory traversal, then presents the results in a squarified treemap that supports drill-down to… Read the review → |
Strengths and trade-offs
FolderSizes — where it wins
- Scans local, network, mapped, UNC, and external drives
- Finds large, old, duplicate, temporary, and other file classes
- Supports scheduled reports, snapshots, trend analysis, and exports
Where it doesn't
- Windows-only availability limits cross-platform use
- Installed-application size analysis is not a dedicated view
- Advanced reporting features require a paid edition
TreeLens — where it wins
- Squarified treemap shows storage usage with file-type coloring.
- Hash-based duplicate finder helps identify repeated files.
- CSV, JSON, and portable snapshot support aid analysis and review.
Where it doesn't
- Windows-only, with no support listed for other platforms.
- MFT fast scanning applies only to eligible elevated whole-volume scans.
- Focused on local storage rather than server-based or cloud analysis.
- FolderSizes7.9/10 · Free plan
A detailed Windows analyzer with scheduled reporting, visualizations, and one-time pricing.
Visit FolderSizesFull verdict → - TreeLens3.5/10 · Free plan
A portable Windows analyzer with treemaps, duplicate finding, exports, and snapshots.
Visit TreeLensFull verdict →
All disk space analyzers comparisons → · Full ranking →
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update