https://stackshare.io/ is decent for crowd-sourced info on what the stack for a ...

mcqueenjordan on July 18, 2018 | parent | context | favorite | on: Google Cloud Global Loadbalancer Outage

https://stackshare.io/ is decent for crowd-sourced info on what the stack for a given company/product is comprised of. Not guaranteed to be accurate, so take it with a grain of salt, of course.