If you think you need a visualization for a product, a project, or an idea, then you probably will need the help of an animation studio. While production houses shoot live footage using cameras, the animation is done digitally on a computer.
A production house can also be an animation studio, if they create 2D or 3D animations, and usually several other graphic design functions. In some cases, you can find businesses that define themselves as graphic design studios, or simply design studios.
Sometimes, you will need to contact different types of providers if your project requires it. A branding strategy could require content production, which at the same time could have an animated component. Media design is another need that could require a holistic approach, especially when one is talking about a product for TV or a video format in general.