AllDup vs Dup Detector
AllDup
alldup.de
Dup Detector
dupdetector.comSide by side
| Figure | AllDup | Dup Detector |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| Plans published | 1 | 1 |
| Spec score · Duplicate File Finders | 8.0 (#9) | 7.6 (#16) |
| Purpose | AllDup searches for and removes duplicate files by content, file properties, similar images, and music tracks. | Dup Detector is a free, open source desktop app for detecting duplicate files and reclaiming drive space. |
| Support | AllDup support materials include online documentation, a support forum, and a technical support request form. | The maker page offers a GitHub issue link and a Discord community for help and feedback. |
Plans
In their own words
Dup Detector
Dup Detector is a free, open-source desktop application for finding duplicate files and reclaiming storage space. It runs on Linux, macOS, and Windows. Smart hashing compares file sizes first, then partial content, and performs full content hashing when needed. The maker says smart hashing can scan 10,000 or more files per second. Multithreaded scanning is supported, and the app describes its memory footprint as minimal. Dup Detector identifies duplicates but does not remove them automatically, so users decide which files to keep or delete. The maker says the code is fully open source and welcomes inspection and contributions. It states that the app has no analytics, telemetry, or data collection. The Free plan costs nothing, is available forever, and includes cross-platform use. GitHub issues and Discord provide support and feedback channels.