For this customer, I recommended SAP HANA Cloud Integration (HCI). For customers who do not use SAP Process Integration and have no plans to invest in an on-premise integration middleware technology, HANA Cloud Integration(HCI) is a good option. HCI does not require investment in hardware and software licenses because it is delivered from the cloud, and the customer pays only for the service during the contract period, which is usually 3-5 years. The subscription fee can come from the HR team's budget and need not come from a CIO's budget. The cost of subscription is usually much lower than the total cost of ownership of an on-premise middleware technology.
Please note that this recommendation is for the Talent Hybrid scenario. You can learn about the three SuccessFactors cloud deployment options here.