Cisdem Duplicate Finder vs Czkawka

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.

Czkawka is a free tool for locating duplicate and unnecessary files, empty folders, similar images, and related items. Its tools can find duplicate and empty files, temporary and large files, similar videos, and duplicate music. Scans can target user-selected directories and files, with matches determined by file name, size, full-file hash, or a combination of size and name. Features include file preview, automatic selection, folder exclusions, and moving items to the Recycle Bin or Trash. The project provides graphical and command-line frontends, an Android frontend, a reusable core library, and Python bindings. It says the software uses multithreading and caching to help scans and later rescans, and that it has no internet access and collects no user information or statistics. Czkawka is listed for Android, Linux, macOS, and Windows. GTK 12.0 is the final release for that frontend, and no more GTK binaries are planned. Krokiet prebuilt binaries have no mandatory runtime dependencies, although its similar-videos tool requires ffmpeg at runtime.