Which OCR engine does PDFpen use?
On Intel-based and Apple silicon Macs, the current version of PDFpen uses the OmniPage OCR engine, version 21, from Kofax, Inc.
For more info on OmniPage, please choose Help > License Agreement from the menu or visit: https://www.kofax.com/Products/omnipage/omnipage-for-developers
Note that not all features of the SDK are licensed for use in PDFpen.
On PowerPC-based Macs, PDFpen uses the Tesseract Open Source OCR Engine.
For more info on Tesseract, please choose Help > License Agreement from the menu or visit: https://github.com/tesseract-ocr.