Private and open-source alternatives to WizTree
15 disk usage analyzers rated against the same public privacy criteria as WizTree, with our picks first.
Why look for an alternative?
- Open source: no. Closed source.
- No trackers or telemetry: no. The website loads Google Analytics, and the privacy policy says aggregate cookie and tracking data may be shared with third parties.
- Independent audit: no. No independent audit is published.
- Works offline: partial. Scans run locally. WizTree can check for updates automatically, a setting that can be turned off, and supporter codes are validated with the vendor's server.
The alternatives
Disk Inventory X Grade B
Disk usage utility for macOS that shows files and folders as a treemap, with a layout algorithm based on KDirStat.
Disk Inventory X scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.
Disk Usage Analyzer Grade B
GNOME's disk usage app, also known as Baobab. It scans folders, drives and remote locations and shows sizes as a tree with a ring or treemap chart.
Based in the United States (Five Eyes). Disk Usage Analyzer scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.
diskonaut Grade B
Terminal disk space navigator written in Rust that shows a folder as an interactive treemap and can delete files while tracking the space freed.
diskonaut scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.
DiskUsage Grade B
Android app that shows internal and external storage as a zoomable map of folders sized by the space they use.
DiskUsage scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.
dua Grade B
Parallel disk usage analyzer for the terminal written in Rust, with an interactive mode for browsing folders and deleting files.
dua scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.
Duc Grade B
Tools for indexing disk usage into a database and browsing it from the command line, an ncurses interface, a graphical viewer or a CGI web page. Built for large file systems.
Duc scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.
dust Grade B
Command-line tool written in Rust that works like du but draws a tree of the largest folders with bars showing each one's share of the space.
dust scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.
erdtree Grade B
Cross-platform file tree and disk usage tool written in Rust, invoked as erd. It respects .gitignore rules and reports size by bytes, blocks, words or lines.
erdtree scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.
Filelight Grade B
KDE's disk usage app. It shows folders as concentric rings, scans local, removable and remote disks, and integrates with the Dolphin file manager.
Based in Germany (Fourteen Eyes). Filelight scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.
gdu Grade B
Fast disk usage analyzer for the terminal written in Go, built for parallel scanning of SSDs, with an interactive interface, exports and an optional local web interface.
gdu scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.
GrandPerspective Grade B
Disk usage app for macOS that draws files as a treemap of rectangles sized by file size. Free from SourceForge, or as a paid build of the same app in the Mac App Store.
GrandPerspective scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.
K4DirStat Grade B
KDE port of the original KDirStat disk usage analyzer for Linux, with a folder tree, a treemap and cleanup actions.
K4DirStat scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.
ncdu Grade B
Disk usage analyzer with a text-mode interface, built to find large files on servers over SSH. Version 2 is written in Zig and version 1 in C.
ncdu scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.
QDirStat Grade B
Qt-based disk usage analyzer for Linux, BSD and macOS by the author of the original KDirStat. It shows a folder tree and treemap, with cleanup actions and views by file type, age and installed package.
QDirStat scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.
WinDirStat Grade B
Disk usage analyzer for Windows that shows a sortable folder tree, file type statistics and a treemap, with duplicate file search and cleanup actions.
WinDirStat scores 85 out of 100 (grade B) on the disk usage analyzers criteria. It meets 5 of 6 criteria: open source, no trackers or telemetry, no ads or data sales, works offline and no account needed.