For user: Ask your company admin to send you the company invitation. Follow the steps once you receive the invitation email.
For company admin:
Once you are signed in, click on user icon in the top right corner, select 'Add a company account' and follow the steps to create a new company.
Each user can be a member of several companies. A company functions as a billing entity and a project workspace which can be shared by several different users. In order to switch between companies click on 'user icon' in the top right corner, select 'Settings', select your company and close with X button.
Company admin can edit company details in Company settings.
Product subscription is valid for limited number of users of a same company. As a company admin you can manage all your active product subscriptions under 'Company admin' and 'Subscriptions' tab.