Within Teamwork Projects, when you add any people to your site, you can mark them as belonging to a specific company. Each project is also associated with a company.
You will create the owner company when you set up your site, and you can then add external companies anytime.
To view your companies, go to the People area at the top of your site where you can select the 'Companies' tab:
Your owner company will have an 'Owner' label beside its name:
Companies provide a way to group people together for privacy settings. Users in the owner company have different permissions options than people in external companies.
You can use external companies as a way to create departments within your projects site. For example, creating one external company for your design team and placing all members of your design department in this company.
Note: A user can only occupy one company at any time.
For more information see: Adding or editing a company