Sites and apps similar to Twofold include WinMerge, which is free and open source. Other options are Meld, Beyond Compare, Unison File Synchronizer and KDiff3. You're spoiled for choice with Diff Tools like Twofold: we list more than 50 alternatives for Windows, Mac, Linux and iPad.
WinMerge JP is a fork of the original WinMerge, but after 2018 the two are nearly identical. WinMerge JP's features including 3-way compare has been merged into the original.
SmartSynchronize is a multi-platform file and directory compare tool. It allows you to compare files or perform 3-way-merges, both with the ability to edit the file contents. SmartSynchronize is specialized in comparing directory structures (for example, of software projects)...
ExamDiff Pro is a powerful, intuitive, and easy to use visual side-by-side comparison tool for comparing and merging text and binary files, and directories.
United States
FileMerge lets you compare one file to another or one directory to another and merge the files or directories together.
United States
Intuitive, multi-platform application for two and three-way visual file and folder comparison.
United States
FolderMatch is a program that compares directories and files, showing the differences clearly.
United States
Free file and folder merge tool providing two-way comparison, Visual Studio and Atmel Studio integration, enhanced folder sync, syntax highlighting, batch operations, Intellisense, navigation by change type, command line support, and detailed control over merges.
Czechia
EU
Guiffy is a diff merge tool and folder compare application and API. SureMerge is the most trustworthy source code 3-way merge tool available. Advanced features include tuneable inline diff highlighting, syntax highlighting and a blend of 3 diff algorithms.
United States
Easily compare and merge text files; compare doc, xls and pdf files; prepare comparison reports and printouts.
Russia
Draftable API Self-hosted is built for on-premise deployments. It is supplied as a virtual appliance and comparisons run entirely in that appliance. That means the confidentiality and privacy of your data is guaranteed.
SemanticMerge - The diff and merge tool that understands C#, Vb.net, Java and now C
