Best Document Comparison Software in 2026
Updated
In short: PDF24 Compare PDF is ranked #1 of 25 as of 4 October 2026, ahead of SmarterDiff and Diffchecker. The best-ranked option with a free plan is SmarterDiff. The lowest first paid tier on this page is Draftable Compare at $0.90/mo.
When you need to inspect differences between versions, the relevant features depend on your file formats and desired output. Compared on Office file comparison and PDF comparison, these tools are also distinguished by formatting changes and redline output. PDF24 Compare PDF, SmarterDiff and Diffchecker are among the entries to weigh against those needs; AFileFix Document Comparison and Differino are included too. Check maximum file size and deployment alongside the comparison capabilities, then consider free-plan availability and paid-from pricing. Those criteria can help narrow choices based on the documents you handle and how you need to review or share edits.
25 document comparison software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
10 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 | PDF24 Compare PDFWeb · Windows · Mac · Linux · Android · iPhone | Three bars | — | 6 of 6 | Free | 6.8 | |
| 2 | SmarterDiffWeb · Windows · Mac · Linux · Android · iPhone | Three bars | — | 6 of 6 | Free | 6.8 | |
| 3 | DiffcheckerWeb · Windows · Mac · Linux | Three bars | — | 4 of 6 | $15/mo | 6.6 | |
| 4 | AFileFix Document ComparisonWeb | Two bars | — | 1 of 6 | Free | 6.4 | |
| 5 | DifferinoWeb · API | Two bars | — | 1 of 6 | Free | 6.4 | |
| 6 | DocFather Compare DocumentsWeb | Two bars | — | 1 of 6 | Free | 6.4 | |
| 7 | Document DeltaWeb · API | Two bars | — | 1 of 6 | Free | 6.4 | |
| 8 | GigAI Document ComparerWeb | Two bars | — | 1 of 6 | Free | 6.4 | |
| 9 | Redline CompareWeb | Two bars | — | 1 of 6 | $4.99/mo | 6.4 | |
| 10 | XKit Document CompareWeb | Two bars | — | 1 of 6 | Free | 6.4 | |
| 11 | Litera CompareWeb · Windows · Mac · Android · iPhone | Two bars | — | — | 5 of 6 | — | 5.7 |
| 12 | Crowdsourced RedlinesWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 13 | DeltaCompareNo platforms listed | One bar | — | — | 0 of 6 | — | 5.2 |
| 14 | DocxLensWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 15 | DrawDiffWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 16 | PdfCompare.appWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 17 | Compare SuiteWindows | No signal | — | — | 1 of 6 | — | 5.1 |
| 18 | Draftable CompareWindows · Self-hosted | One bar | — | — | 1 of 6 | $0.90/mo | 5.0 |
| 19 | VisibleThreadWeb · Windows · Linux | Two bars | — | — | 3 of 6 | — | 5.0 |
| 20 | Diff DocWindows | One bar | — | — | 1 of 6 | — | 4.9 |
| 21 | i-net PDFCWeb | One bar | — | — | 1 of 6 | — | 4.9 |
| 22 | PDiffWindows · Mac | One bar | — | — | 2 of 6 | — | 4.9 |
| 23 | Setpdf PDF CompareWeb | No signal | — | — | 1 of 6 | — | 4.8 |
| 24 | SIDETRACKWindows | No signal | — | — | 1 of 6 | — | 4.8 |
| 25 | UltraCompareWindows | No signal | — | — | 1 of 6 | — | 4.8 |
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which document comparison software is ranked first on Freedom251?
PDF24 Compare PDF is ranked #1 of 25 with a score of 6.8. SmarterDiff is second and Diffchecker third.
How many of these have a free plan?
10 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Draftable Compare has the lowest first paid tier we found: $0.90/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. Paid placements never change a rank.