Delve vs GrandPerspective
GrandPerspective is the classic free treemap on the Mac: open source and still maintained. Delve is a modern, native take on the same idea, $4.99 once or free through referrals, with a 14-day free trial. Here's a side-by-side comparison, including the reasons you might keep GrandPerspective.
Khaos Studios makes Delve. This comparison draws on the official product documentation linked below.
GrandPerspective is a strong starting point if you want a free, open-source disk visualizer. Delve is worth trying if you want to move between a treemap and sunburst, inspect files with Quick Look, and collect cleanup candidates as you explore.
Both are Mac apps. Both support previews. The choice is about the controls you use and the Mac you own, rather than one app having a claim to being native.
| Feature | Delve | GrandPerspective |
|---|---|---|
| Price | $4.99 once or free through referrals; 14-day trial | Free from SourceForge; $2.99 on the App Store |
| License | Commercial | Open source, GNU GPL |
| Views | Treemap and sunburst | Treemap with configurable color mappings |
| Preview | Quick Look | Quick Look |
| Cleanup | Collector, then Trash | File and folder removal from the view |
| Analysis tools | Visual exploration and size inspection | Custom filters, saved scans, image and text export |
| Current requirements | macOS 26+, Apple Silicon | macOS 14+, Apple Silicon or Intel |
GrandPerspective’s official feature list and release notes describe its filters, exports, and current requirements. Older macOS versions need an earlier GrandPerspective release.
Choose GrandPerspective if open source is a requirement, a free treemap solves your problem, or you want to save and revisit scans. Its filter system can focus a view by file type, path, size, and other properties. That is useful when your question is more specific than finding the biggest folder.
There is no need to replace a useful tool simply because a paid alternative exists. If you already recognize the files you want to review in GrandPerspective, its map may be all you need.
Delve is designed around a short sequence: scan a location, explore its shape, preview an item, and gather selected files in the Collector. The treemap emphasizes relative size. The sunburst makes folder depth visible. You can choose the view that makes the current folder easier to understand.
Use a representative folder with a mix of large files and nested directories. Compare how easily you can find an item, check its location, preview it, and return to the parent folder. Those everyday actions are a useful basis for choosing.
Yes, the official SourceForge download is free. The developer also offers the same app on the Mac App Store for $2.99, with store distribution and automatic updates.
Yes. Its current release supports Apple Silicon and Intel Macs running macOS 14 or later. Earlier releases support older macOS versions.
Yes. GrandPerspective lists Quick Look previews among its features, along with Finder integration, filters, saved scans, and exports.
The comparison here focuses on Delve’s visual exploration and cleanup workflow. If custom filters, saved scans, or exported reports are essential, evaluate those requirements explicitly before switching.
Product details checked September 19, 2026. Prices are in USD where shown; storefronts, taxes, and offers may differ. Recommendations reflect the workflows described here, without a comparative performance benchmark.
Continue with GrandPerspective vs OmniDiskSweeper, finding large files on Mac.
Explore your storage with Delve. See the largest files, preview what you find, and choose what belongs in the Trash.