Diffract vs Meld

Diffract is a desktop tool for comparing code, folders, documents and binary files on Linux, macOS and Windows. Text and code comparisons include syntax highlighting for more than 30 languages, word-level changes, moved-block detection and collapsible unchanged regions. Folder comparisons traverse directory trees, show added, removed and modified files, and allow inspection of file contents. The command-line interface supports standard, Myers and patience diff algorithms for scripts, Git hooks and CI pipelines. Pro adds three-way Git merge conflict resolution, document comparisons for PDF, Word and Excel, semantic code comparison, and Git history and commit browsing. The Free tier includes unlimited file and directory comparisons, desktop and CLI tools, three algorithms, and hex or binary comparison. The maker says comparisons run locally and files stay on the computer. Free is $0 forever and permits commercial use, but not redistribution. Pro costs $34, paid once per seat; its license key specifies a seat count and version ceiling, and includes all v1.x updates. A full refund can be requested within 30 days of purchase.

Meld is a free visual diff and merge tool for comparing files, folders, and version-controlled projects. It shows changes as files are edited, provides navigation between differences, and assists with three-way merges, including conflict handling and display of the base version. Folder comparisons identify missing or modified files and allow selected files or folders to be ignored. Meld supports Git, Mercurial, Bazaar, and Subversion, including integration with tools such as git mergetool. Users can define regular-expression filters to ignore matching text, but filtering support is incomplete and filters cannot change the number of lines. The software is available for Linux and Windows. Linux packages are offered by most Linux and Unix distributions and through Flathub; Windows users can download an installer. Windows builds do not support automatic updates or portable installs. macOS is not yet supported, though the project lists semi-official builds and installation options through Homebrew, MacPorts, or Fink. Meld 3.24.0 is listed as the stable release dated 20 June 2026. The plan costs nothing and lists a GPLv2-or-later license, except as noted.