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.