Hi @sacad,
If you are looking for a great alternative to DU then you really have to try Rossum Automate Document Communication with Artificial Intelligence | Rossum.ai.
They are the alpha when it comes to intelligent document parsing. Rossum is easy to setup and make custom connectors all in python. It is also quite straightforwad to integrate with any RPA tool.
Docparser is another SaaS worth a mention here.