Do I need to create both a Contact and a Company for everyone I work with?
Not necessarily—it depends on how you work with them. Individual people who need access (to view project details, receive invitations and assignments, or log in) must always be created as Contacts. Company records are most useful when you work with organizations that have multiple points of contact, or when you need to store business-level information like trade category, licensing, or internal quality ratings.
For solo operators or one-person subs, a Contact record alone may be sufficient. For larger firms with multiple employees you interact with regularly, pairing a Company record with associated Contacts gives you a fuller, more organized picture.