title: Process large volume of pdfs with OCR
body: <p>I need to process a large quantity of multipage pdfs (around 23,000 documents and an average of 30 pages) into text. Since the documents are typewritten and scanned I want to use OCR recognition to avoid characters recognition mistakes. The problem is the estimated running time on R (using the <code>Tesseract</code> package) is crazy. Is there an online service provider that can be used for this task?</p>
  <p>N.B. I had a look both at Amazon Web Service and Google Cloud, but is extremely difficult for me to understand how to use them, especially how to automate the whole process</p>