Best File Comparison Software in 2026
Updated
In short: Buddi is ranked #1 of 32 as of 7 October 2026, ahead of Diffchecker and Diffract. The best-ranked option with a free plan is Diffchecker. The lowest first paid tier on this page is Kaleidoscope at $0.67/mo.
File comparison software helps you inspect differences between files or folders and, in some cases, work through conflicting edits. Compared on binary comparison, folder comparison, three-way merge, merge conflict tools, version-control support, supported platforms, free plan, and paid from, these entries offer several useful distinctions. Buddi, Diffchecker, and Diffract are among the options shown. Consider whether you mainly need to identify changes, compare folder contents, or manage edits from multiple versions. Platform support and version-control compatibility may matter to your workflow, while free-plan availability and paid-from pricing can help you judge the cost considerations.
32 file comparison software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
9 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | BuddiWindows · Mac · Linux | Three bars | — | 3 of 6 | Free | 6.6 | |
| 2 | DiffcheckerWeb · Windows · Mac · Linux | Three bars | — | 4 of 6 | $15/mo | 6.6 | |
| 3 | DiffractWindows · Mac · Linux | Three bars | — | 3 of 6 | Free | 6.5 | |
| 4 | MeldWindows · Linux | Two bars | — | 2 of 6 | Free | 6.5 | |
| 5 | Code CompareWindows · Extension | Two bars | — | 1 of 6 | Free | 6.4 | |
| 6 | WinMergeWindows | Two bars | — | 1 of 6 | Free | 6.4 | |
| 7 | cwdiffLinux | Two bars | — | 1 of 6 | Free | 6.3 | |
| 8 | NextDiffWindows | Two bars | — | 1 of 6 | Free | 6.3 | |
| 9 | SmartSynchronizeWindows · Mac · Linux | Two bars | — | — | 3 of 6 | — | 5.6 |
| 10 | TkDiffWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.4 |
| 11 | Diff-TextWeb · Windows | No signal | — | — | 2 of 6 | — | 5.3 |
| 12 | P4MergeWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.3 |
| 13 | Beyond CompareWindows · Mac · Linux | Two bars | — | — | 3 of 6 | — | 5.2 |
| 14 | Beyond CompareWindows · Mac · Linux | Two bars | — | — | 3 of 6 | — | 5.2 |
| 15 | KDiff3Windows · Mac · Linux | Two bars | — | 3 of 6 | Free | 5.2 | |
| 16 | DiffinityWindows | No signal | — | — | 1 of 6 | — | 5.1 |
| 17 | KompareLinux | No signal | — | — | 1 of 6 | — | 5.1 |
| 18 | MergelyWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 19 | AmSo CompareMac | One bar | — | — | 1 of 6 | $1.08/mo | 5.0 |
| 20 | Compare It!Windows | One bar | — | — | 1 of 6 | — | 5.0 |
| 21 | FolderMatchWindows | One bar | — | — | 1 of 6 | — | 5.0 |
| 22 | KaleidoscopeMac | One bar | — | — | 1 of 6 | $0.67/mo | 5.0 |
| 23 | DeltaWalkerWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 4.9 |
| 24 | GuiffyWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 4.9 |
| 25 | Altova DiffDogWindows | No signal | — | — | 1 of 6 | — | 4.8 |
Compare all 25 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Three-way merge | Folder comparison |
|---|---|---|---|---|---|---|---|---|
| 1 | Buddi | 6.6 | Free plan | Free | Yes | — | Yes | Yes |
| 2 | Diffchecker | 6.6 | Free plan | $15/mo | Yes | 15 /user/mo | — | Yes |
| 3 | Diffract | 6.5 | Free plan | Free | Yes | — | Yes | Yes |
| 4 | Meld | 6.5 | Free plan | Free | Yes | — | Yes | Yes |
| 5 | Code Compare | 6.4 | Free plan | Free | Yes | — | Yes | Yes |
| 6 | WinMerge | 6.4 | Free plan | Free | Yes | — | Yes | Yes |
| 7 | cwdiff | 6.3 | Free plan | Free | Yes | — | — | — |
| 8 | NextDiff | 6.3 | Free plan | Free | Yes | — | — | Yes |
| 9 | SmartSynchronize | 5.6 | No | — | Yes | — | Yes | Yes |
| 10 | TkDiff | 5.4 | No | — | Yes | — | Yes | Yes |
| 11 | Diff-Text | 5.3 | No | — | Yes | — | No | Yes |
| 12 | P4Merge | 5.3 | No | — | Yes | — | Yes | Yes |
| 13 | Beyond Compare | 5.2 | No | — | No | — | Yes | Yes |
| 14 | Beyond Compare | 5.2 | No | — | No | — | Yes | Yes |
| 15 | KDiff3 | 5.2 | Free plan | Free | — | — | Yes | Yes |
| 16 | Diffinity | 5.1 | No | — | Yes | — | No | Yes |
| 17 | Kompare | 5.1 | No | — | Yes | — | — | Yes |
| 18 | Mergely | 5.1 | No | — | Yes | — | No | — |
| 19 | AmSo Compare | 5.0 | No | $1.08/mo | No | — | Yes | Yes |
| 20 | Compare It! | 5.0 | No | — | No | — | No | Yes |
| 21 | FolderMatch | 5.0 | No | — | — | — | — | Yes |
| 22 | Kaleidoscope | 5.0 | No | $0.67/mo | No | 8 /user/mo | Yes | Yes |
| 23 | DeltaWalker | 4.9 | No | — | No | — | Yes | Yes |
| 24 | Guiffy | 4.9 | No | — | No | — | Yes | Yes |
| 25 | Altova DiffDog | 4.8 | No | — | No | — | Yes | Yes |
Is your app on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which file comparison software is ranked first on Freedom251?
Buddi is ranked #1 of 32 with a score of 6.6. Diffchecker is second and Diffract third.
How many of these have a free plan?
9 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Kaleidoscope has the lowest first paid tier we found: $0.67/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.