Altova DiffDog vs UltraCompare
Altova DiffDog
altova.comUltraCompare
ultraedit.comSide by side
| Figure | Altova DiffDog | UltraCompare |
|---|---|---|
| Price from | — | $8.33/mo |
| Free plan | — | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| Plans published | 2 | 4 |
| Spec score · File Comparison Software | 8.3 (#4) | 8.3 (#7) |
| Spec score · Diff and Merge Tools | 8.3 (#4) | 8.3 (#9) |
| Founded | 1992 | 1994 |
| Headquarters | Vienna, Austria; Marblehead, Massachusetts, United States | Austin, Texas, USA |
| Intended users | Altova describes DiffDog as a technical diff/merge tool for developers and IT professionals. | The maker lists developers and engineers, IT and system administrators, QA and technical writers, and legal, compliance, and business teams as users. |
| Purpose | DiffDog compares and merges text and source-code files, XML and JSON files, Word documents, directories, and database schemas and content. | UltraCompare compares and merges text files, folders, and documents including Word, Excel, and PDF. |
| Trial | The trial unlocks all features for 30 days after the user requests an evaluation license, which is sent by email. | The product page says a free, full-feature trial is available to download before purchase, but does not specify its duration. |
Plans
Altova DiffDog
- DiffDog 2026 Professional Edition$189, paid once
- DiffDog 2026 Enterprise Edition$269, paid once
UltraCompare
- UltraEdit Core Subscription$99.95 a year
- UltraEdit Enterprise Subscription$119.95 a year
- UltraEdit Core Perpetual$179.95, paid once
- UltraEdit Enterprise Perpetual$249.95, paid once
In their own words
Altova DiffDog
Altova DiffDog has no write-up on Specifiction yet; its figures are above.
UltraCompare
UltraCompare compares and merges files, folders, and documents, including Word, Excel, and PDF. It can show two or three files side by side and lets users merge differences visually. Folder tools compare, merge, and synchronize directory structures, with rule-based automation available. For spreadsheets and other tabular data, it can compare and merge cells, rows, or columns, including across multiple Excel sheets. UltraCompare works as a diff and merge tool with Git, Subversion, and CVS. It can compare remote files over FTP or SFTP and by URL, and folders over FTP and network shares. ZIP, RAR, and JAR contents can be compared without extraction. Additional tools include highlighting for characters, words, or lines; options to ignore whitespace or case; editable comparisons; saved sessions; and HTML or text reports. The maker lists Windows, macOS, and Linux, while a fully functional Windows trial includes all features for 30 days. There is no free plan. Subscriptions start at $99.95 a year for Core or $119.95 a year for Enterprise; perpetual options cost 179.95 USD or 249.95 USD once.