Compare Suite vs Document Delta

Compare Suite is a Windows file comparison tool for office professionals, developers, and webmasters. It compares Word, Excel, PowerPoint, PDF, web pages, and plain text, and can produce reports with comments attached to differences. Spreadsheet comparisons show absolute or percentage changes in numbers and date differences in days. PDF comparison extracts text, so scanned PDFs need OCR before their text can be compared. The software can compare and synchronize local or remote folders, compare files over FTP, and inspect ZIP or RAR archives without unpacking them. Command-line automation and integrations with third-party document management systems and tools are also listed. The maker says processing happens locally and opened files remain on the PC. The free Light plan covers basic file comparison; paid one-time licenses are $70, paid once for Standard and $140, paid once for Professional. A fully functional 30-day evaluation is available. Windows 10 or Windows 7 is listed as a minimum requirement; Word and Excel comparisons require Microsoft Word and Excel, and Office 365 is not supported.

Document Delta compares two DOCX files and returns a document marked with Word's native tracked changes. Its web workflow is upload, compare, and download, with no signup required. The comparison covers paragraphs, tables, headers, footers, text boxes, content controls, and characters, detecting insertions, deletions, and formatting changes at run and character level. It can identify bold, italic, underline, font, and style changes even when the wording is unchanged. Reviewers can accept, reject, or comment on the revisions in Microsoft Word. The service also offers a REST API that compares two Word documents in one HTTP request without an SDK or API key, with examples for C#/.NET, Python, JavaScript, PowerShell, and Java. Files are processed in memory and discarded when comparison finishes. The free demo costs nothing. Each API file is limited to 500 KB, and the public API allows 10 requests per hour per IP address. The free comparison tool is in beta and actively improving.