What is different between Process Integration and Process Orchestration?

SAP Process Orchestration is the newest version of SAP Process Integration. SAP Process Integration 7.5 version is called SAP Process Orchestration.

There are new features included in SAP Process Orchestration since it is an upgraded version of SAP Process Integration. The main feature upgrade in SAP Process Orchestration is it excluded the ABAP stack that was there in SAP Process Integration and moved on only with the JAVA stack.