For us, "on-prem" means "in our private AWS cloud, with no dependencies on the Public Internet". For critical services for engineering, we want to know that you

For us, "on-prem" means "in our private AWS cloud, with no dependencies on the Public Internet". For critical services for engineering, we want to know that your service is not going to stop working if Github or some CDN goes down or has latency problems. We want to know that you aren't going to toggle some feature switch on your service and expose us to some new bug. We want to know how much headroom your software has, so we know if it can scale with us. I think this concept of "on-prem" being "in our private cloud, firewalled from the internet" is pretty well-understood among consumers of AWS or other IaaS products.