Your business could most likely benefit from input from data scientists, but this does not mean that you need to hire them directly. Some companies (especially tech-focused businesses and those that have undergone a complete digital transformation) have in-house data analysts and departments focused on data science and Big Data. But hiring an outside expert or consultancy might be more practical and efficient (meaning less expensive).
A consultancy’s data scientists can assist a business according to its unique needs, such as a specific project, through periodic consultations, or on a continuous basis. An outside data specialist can often provide a clearer, more objective view of a company’s data assets and thereby illuminate blind spots the company might have been unaware of.