You can belong to as many Tactick organizations as you'd like. Tactick accounts are at the individual user level, so you can join others' organizations and add your own organizations.
While each organization is separate, you can view all of them when you're signed in to your Tactick account.
Use the Switch Org button to switch between organizations. You can select 'All Organizations' to view areas, routines, and tasks across all the organizations you're a member of.
If you'd like to add another organization, see Creating a Tactick organization.