This depends on various factors such as the size of the company, how critical the data you handle is. how many users will be accessing Cabinet at one point in time and whether the company is a start-up or not.
The use of Cabinet can also grow based on its need within the organisation as well as the size of the organisation itself. Most of our clients have started using Cabinet when the company was opened and then increased the space and the users with the growth of the company itself. Other established clients started using Cabinet for one department only and then progressing its use to various other departments. 
If you need some help in deciding which version of Cabinet is most suitable for you organisation go through the feature below for further assistance.
which Cabinet for me