What business doesn't use some kind of framework, even for the backend? I've never heard of a successful business building everything from scratch, usually you'

What business doesn't use some kind of framework, even for the backend? I've never heard of a successful business building everything from scratch, usually you'll have something like Qt for GUI construction, or Django/Ktor/ASP.NET for a web server. I believe Wikipedia uses mostly frameworkless Javascript, but, as you might expect from any sufficiently sized project, they have come up with their own frameworks instead.