Is there a plugin to extract PDF text besides PDF Tools and GoogleVision/AI/IDP?

I'm looking into ways to retrieve text from a PDF in Appian beyond the ones I'm currently aware of, which includes the PDF tools plugin or Google integrations.

The PDF tools plugin doesn't preserve the order of text in a document well, and Google integration options do not work for all customers for a variety of reasons. Is anyone extracting PDF content through a different tool? Preferably not proprietary enterprise purchase tools, but I'd like to compile a list of those as well. 

  Discussion posts and replies are publicly visible