WinMerge is described as 'Open source differencing and merging tool for Windows. WinMerge can compare both folders and files, presenting differences in a visual text format that is easy to understand and handle' and is a leading Diff Tool in the file management category. There are more than 50 alternatives to WinMerge for a variety of platforms, including Windows, Mac, Linux, Web-based and SaaS apps. The best WinMerge alternative is Meld, which is both free and Open Source. Other great apps like WinMerge are Beyond Compare, KDiff3, Araxis Merge and P4Merge.