Teambook offers a module to help fast moving companies to better plan their mid-term capacity.
You access Capacity planning by clicking on the Capacity (infinity icon), located over the planning screen on its top right corner
Doing so, a new screens appears, each column displaying the upcoming months. Note that while in Teambook operational planning, the booking duration is measured in hour(s) per project, capacity planning is based on number of days per months.
A selector located next to the Capacity button allows you to dive into your capacity planning by projects, by users and then to display its results. Most probably, your organization's capacity planning will involve iterations between these submenus, so to reach the most optimal allocation.