PDFTagDog vs PREP
| PDFTagDog | PREP | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | self-hosted, Web | Web |
| Free plan | No | No |
| PDF tagging tools | Yes | Yes |
| Reading order tools | Yes | Yes |
| Alternative-text tools | Yes | Yes |
| PDF/UA support | Yes | Yes |
| OCR support | Yes | Yes |
| Batch processing | Yes | Yes |
| API access | — | Yes |
Both are listed in Best PDF Accessibility Software. On Samsung Mobile US Press, PREP scores higher on our published basis.