Read some books written by Harry Turtledove. He has a whole series about alternate history based on that very subject.
Wouldn’t have had industrial then technological revolution. People generally want to avoid mindless, strenuous work such as fetching water from miles away or working in mosquito encrusted fields. When you have slaves to do these tasks there is no reason to innovate to minimize the energy and resources to complete tasks. If there are no slaves, people will first provide services to those willing to pay. Over time, they will innovate and create technologies that allow them to provide those services at the absolute minimum cost and use of resources.