Cisdem Duplicate Finder vs DoubleKiller

Cisdem Duplicate Finder detects duplicate files and visually similar photos on macOS and Windows. It compares file contents rather than filenames, covering images, documents, songs, videos, archives, and duplicate folders. For photos, it can identify burst shots, edited or resized versions, and pictures taken from different angles or in different lighting. The maker says this photo analysis runs entirely on the device without uploading files to a cloud or server. Results can be previewed in three modes, then sorted, searched, and filtered. Users can remove duplicates permanently, move them to Recycle Bin or Trash, or place them in a selected folder. Supported locations and services include external drives and SD cards, iTunes and Apple Music, Mac Photos, OneDrive, Dropbox, Google Drive, and iCloud. The trial can scan, preview, locate, and hide duplicates, but cannot delete all selected duplicates with one click. One-time individual licenses cost $39.99 as a one-time purchase for one Mac or one PC; one-year subscriptions cost $19.99 a year. Business licenses cost $54.99 as a one-time purchase for one computer.

DoubleKiller is a Windows utility that finds duplicate files in directories, on complete drives or on computers in Network Neighborhood. It can compare files using any combination of name, size, modification date and content. Scans can exclude files by name, type, attributes or size, and the results list lets users choose files to delete or move to another directory. Results can also be exported to a text file. The program is a standalone executable that can be extracted and run without installation; its maker says it does not change the system without prior permission. The free version is for private use and allows unlimited folder and file counts, but individual files are limited to 2 GB and commercial use is not permitted. DoubleKiller Pro adds a multilingual interface, advanced comparison options, saved and reloadable result lists, and command-line automation. The download page lists version 1.6.2.82 dated 2007-07-07, and the maker says development is paused. The listed paid starting price is $19.95 one-time.