AFileFix Document Comparison vs Differino

AFileFix Document Comparison is a free web tool for comparing one pair of document versions. It identifies added, removed, and modified text in PDF or DOCX files, including mixed-format pairs, with a 25 MB limit per file. Results appear on screen, and a downloadable DOCX report provides analysis and plain-English explanations of each change and why it might matter. The tool is recommended for structured, text-heavy documents such as contracts, policies, proposals, terms of service, and manuals.

Both files are sent to Anthropic's Claude API for processing. AFileFix says it removes uploaded files from its server within minutes. Anthropic retains API data for up to 30 days for safety review, then deletes it, and does not use it to train AI models. The comparison covers text, not layout-only changes such as fonts, spacing, page breaks, or margins. Scanned and password-protected PDFs are unsupported, and the tool does not OCR scanned files. Documents over approximately 150 pages may be truncated. It does not provide three-way comparison, Word track changes, or legal redline output.

Differino compares PDF, DOCX, and TXT documents and displays changes side by side. Users can review revisions in visual or text comparison modes. For scanned or image-based PDFs, OCR-assisted extraction and rendered page differences help surface changes. Each file can be up to 45 MB. The free plan includes one comparison, 24-hour share links, watermarked PDF exports, and 14-day retention for uploads and results. One-time credit packs provide additional comparisons with no-expiry credits and watermark-free exports; Pro items are retained for 365 days. The service also offers a REST API and an MCP server for Claude, Cursor, and other compatible clients. Differino states that data in transit is encrypted with TLS 1.3 and stored data with AES-256. It describes use cases including contract review for legal and business teams, and report review for finance, audit, and operations. The finance page says it focuses on document comparison rather than native spreadsheet diffing.