Firms can require everyone to sign in on the company account, so no project work happens on a personal free login.
Blocking free accounts
An organization can set a policy that free-tier accounts may not be used. When someone signs in with an email of the organization, Raven blocks the chat and tells them why:
Organization Account Required Your organization does not allow using free accounts. You are on the FREE Tier. [Log Out & Sign In Again]
The button takes the user straight to login, where they authenticate with their organization account and carry on.