Diff Doc
Diff Doc is paid Windows desktop software for comparing documents and folders.
What Diff Doc is
Diff Doc is paid Windows desktop software for comparing documents and folders. It handles PDF, Word, Excel, PowerPoint, RTF, HTML, XML, and plain text files, showing differences in Side By Side or All In One views at word or letter level. Folder comparison can identify changed files before detailed review. The application can report formatting changes, produce redline output, and create reports in Microsoft Word, HTML, text, or comma-delimited formats. Command-line operation, batch processing, and scheduled or automated comparisons support repeatable workflows. Integrations are documented for Worldox, TortoiseCVS, and other document-management software through command-line use. Privacy Mode avoids loading or saving comparison file names and paths across sessions. Diff Doc offers a free 30-day trial and has no free plan.
Good
- Compares PDF and Office files
- Supports folder comparisons
- Provides redline output
- Offers command-line and batch processing
- Creates multiple report formats
Watch out
- No free plan
- Windows desktop software
- Professional license costs $499.95, paid once
- Mac requires virtualization software
Who it suits
It suits Windows users comparing Office, PDF, and other text-based files, including folder batches and automated jobs. Mac use requires Parallels or VMware Fusion.
Verdict
Diff Doc covers detailed file, folder, formatting, and redline comparisons with automation and reporting options. Its paid Windows desktop model, trial, and perpetual-license pricing suit organizations needing repeatable document review.
Plans and prices
From Diff Doc's own pricing page, checked 8 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Diff Doc Professional | $499.95, paid once | Default displayed total price · Number of user licenses, maintenance upgrades, and server license are selectable · Perpetual license; not a subscription |
The facts
Each one read from Diff Doc's own pages, with the date it was checked.
What it does
- Automation
- The product supports command-line comparisons, batch processing, and scheduled or automated comparisons.checked 8 Oct 2026
- Comparison views
- It displays differences in either Side By Side or All In One views, with word- or letter-level comparisons.checked 8 Oct 2026
- Folder comparisons
- It can compare folders and identify files that differ before a detailed file comparison.checked 8 Oct 2026
- Integrations
- The maker documents integrations with Worldox and TortoiseCVS, and describes command-line integration with other document management software.checked 8 Oct 2026
- Privacy mode
- Privacy Mode prevents Diff Doc from loading or saving file names and paths from comparisons across sessions.checked 8 Oct 2026
- Privacy policy scope
- The privacy policy describes information practices for the SoftInterface website and says it does not collect credit card numbers on the site.checked 8 Oct 2026
- Purpose
- Diff Doc compares PDF, Word, Excel, PowerPoint, RTF, HTML, XML, and plain text files.checked 8 Oct 2026
- Reports
- It can create comparison reports in Microsoft Word, HTML, text, and comma-delimited formats.checked 8 Oct 2026
- Support
- SoftInterface says most email responses arrive within hours and at most 24 hours, with chat listed from 7 AM to 5 PM PST.checked 8 Oct 2026
The company
- Company history
- SoftInterface says it was established in 1999 and develops file comparison and conversion software, particularly for Microsoft Office users.checked 8 Oct 2026
- Founded
- 1999checked 28 Sep 2026
- Headquarters
- The company lists its office address as 938 Lincoln Blvd #6, Santa Monica, California 90403, United States.checked 8 Oct 2026
Where it runs
- Platform support
- The FAQ says Diff Doc works on 32-bit and 64-bit Windows operating systems and Windows Server; Mac users can run it through Parallels or VMware Fusion.checked 8 Oct 2026
- Windows Explorer
- The product can be launched from Windows Explorer, the desktop, and Find In Files using the right-click menu.checked 8 Oct 2026
Money
- Trial and guarantee
- The maker advertises a free 30-day trial and a 30-day money-back guarantee on purchases.checked 8 Oct 2026
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