Source code of bench manager GitHub - frappe/bench_manager: Frappe app for managing bench
You can also check GitHub - frappe/agent: Works with https://github.com/frappe/press and GitHub - frappe/press: World-class cloud hosting for the Frappe stack
If you are looking for custom SaaS / PaaS with Kubernetes, check https://k8s-bench.castlecraft.in and https://castlecraft.gitlab.io/k8s_bench_interface. I created it from Help us build the PR Review System