I think a lot of the comments are missing the PDF in the name OCRmyPDF. Having a software package that combines several open source tools to disassemble a PDF,

I think a lot of the comments are missing the PDF in the name OCRmyPDF. Having a software package that combines several open source tools to disassemble a PDF, do cleanup on each page, run OCR on them, and then reassemble them into a new PDF with the text embedded is why OCRmyPDF is so great. I see lot of worthy software also being mentioned in the discussion but a lot of it requires rolling your own cleanup steps or our reassembling steps because the packages are designed for single-image scans or only deliver JSON output (which requires some fairy dust to get back properly into HOCR and then into a PDF). As I posted above, I got someone to add Google Cloud Vision as an alternate OCR engine for OCRmyPDF — I'd love to see more OCR engines (like ones suggested here) made possible.