What is the most widely automated process nowadays?

Correct. Incoming invoice handling.

e-Invoicing

With Process Companion e-Invoicing you can easily automate

- Inbound Invoices (vendor invoices) and

- Outbound Invoices (customer invoices).

With the Process Companion BPM Suite you are sure to stay flexible with your processes, because it is based on the BPMN 2.0 standard. If process requirements change, simply change your process diagramm and deploy it (= upload the BPMN 2.0 XML file).
And you may want to have a documented process for your outbound customer invoices as well. With Process Companion this is simple. Guess what? Use a BPMN 2.0 XML file and upload it to Process Companion.