CASO Comply vs PRO Viewer
| CASO Comply | PRO Viewer | |
|---|---|---|
| Free plan | No | |
| Platforms | api, self-hosted, Web | Linux, Web, Windows |
| Free plan | No | |
| PDF tagging tools | Yes | Yes |
| Reading order tools | Yes | Yes |
| Alternative-text tools | Yes | Yes |
| PDF/UA support | Yes | Yes |
| OCR support | Yes | |
| Batch processing | Yes | Yes |
| API access | Yes | Yes |
Listed together in Best PDF Accessibility Software