Animation is a bit tougher, Keyshot is a very limited animation tool, depending on what your needs are at a certain point anything beyond some basic 360 spins or exploded views you can’t get the results you’d want in Keyshot. That’s when a full fledged animation tool like Cinema4D, Maya, or Blender would come in. You’d want something with keyframes that would let you not only control your object, but also parameters for your lighting objects, camera, etc.
From there, there are a number of compositing tools like After Effects or Nuke which are designed for professional compositing. The same way you can composite a single render from multiple objects you can composite an animation. But realistically no typical designers go that far because the skill set and time investment is too high. That’s where full up visualization/graphics agencies come in who don’t have to worry about having designers, but guys specialized in modeling, animation , rendering and compositing.