There are a variety of large management consulting firms such as Bain, McKinsey, Boston Consulting Group (to name a few) that help organizations with various issues, including strategic planning.
These larger organizations use their people power, both in number and in skills of data analysis, to help business leaders make the best decisions and plans for their organizations. These firms have access to abundant resources, and they will charge you no less than a mid-five figures to work with them .
