In H-Sphere a plan determines account's type or, in other words, account privelesges and hosting resources/services an account owner gets with their account. All plans are created and editted with corresponding plan wizards and can be divided into three main types:

Reseller and User plans determine resource pricing if configured as pay plans.

User plans can differ by platform: Unix, Windows, Zeus, Real Unix, Real Windows

You can also create Demo plans that demonstrate the capabilities of H-Sphere without having to use real resources.

Customers can change their hosting plan. You can configure which plans customers can upgrade from and to as suggested in Compatible Plans.