Every one of these is the same agent. What changes is what it already knows on day one: the jobs, the words, the things it must never say, and the point where it stops and wakes a person. Open any one to see what it runs.
Your industry does not have to be on the list. You teach it the way you would teach a new hire: say what changed, set the rules it can never break, and it knows from the next conversation. It remembers who called last month and follows up when nobody else did. A driving school, a law firm and a dental lab each end up with someone who knows the business — not a chatbot that read the website.