In Clayton, there are three main account user roles:
Administrator
can invite new users (specifying the role and the projects to associate)
can manage users (roles and the projects to associated)
can create connections (read more here)
can configure the default review criteria
can see and join all the projects
can be project lead or developer (read more here)
User
can see and join all the projects
can be project lead or developer (read more here)
Collaborator
can see only the projects they are associated
can be project lead or developer (read more here)