YottaDots is free for use. You can make as many boards as you want, share it with as many people as you want. So really unlimited, only when you want others also to creat boards and work more as a company, I believe that a small payment to cover the costs is okay. € 15 euro per month or € 150 euro per year is not much. then really everybody within your company can create boards, invite people etc.
Freemium means that one account can create unlimited boards, Enterprise means that multiple people within your company can do this. In both cases it’s unlimited in boards, users, teams etc.
In the near future the plan is to also give the Enterprise user more freedom like using their own logo or URL. A more white label approach.