Company Account is created when an individual signs ups and creates a new account for their company on Quible. This individual is automatically assigned the role of Company Admin, which can be transferred to another user later, and you can have multiple Company Admins.
A Company Account holds all Knowledge Bases, Projects, and Users. Only a Company Admin has editable access to all features.
Project Admins also have access to certain features on the Company Level, these revolve around Projects and Knowledge Bases, and Users.
User Account is the account for all users. It does not give access to the Company Account Settings, and does not have certain permissions. A user can have their own profile settings, private Conversations, and Knowledge Bases.