AllDup vs rdfind
AllDup
alldup.derdfind
rdfind.pauldreik.seSide by side
| Figure | AllDup | rdfind |
|---|---|---|
| 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) | 7.3 (#23) |
| Founded | 1999 | 2006 |
| Purpose | AllDup searches for and removes duplicate files by content, file properties, similar images, and music tracks. | rdfind finds duplicate files by comparing their contents rather than their names, and can help compress backup directories. |
| Support | AllDup support materials include online documentation, a support forum, and a technical support request form. | The site directs users to GitHub issues for bug reports and feature requests and invites suggestions and comments. |
Plans
In their own words
rdfind
rdfind is a free command-line utility that finds duplicate files by comparing contents rather than names. It searches supplied directories recursively, including comparisons within or across directories, and can also accept individual files. Matching uses file size, first and last bytes, checksums, and inode or device identity. Supported checksums are MD5, SHA-1, SHA-256, SHA-512, and xxh128, with SHA-1 as the default. By default, rdfind writes a results file without changing files. Options can delete duplicates or replace them with symbolic or hard links, while a dry run previews an enabled action. Filters can ignore empty files or set minimum and maximum sizes. It runs on Linux, macOS, and Windows; Linux packages include apt and dnf examples, Mac installation can use MacPorts, and Windows users may use Cygwin. The manual warns about changing directories during a run, symlink attacks when deleting or linking, and unsupported ownership or permissions handling.