What are the differences between the different XTM Cloud account types?

A freelance account is for a single named user and comes with a set number of words that can be processed each month.
A group licence is for 2, 3 or 4 named users who wish to work together on translation projects. You can choose how many words you want to translate each month.
An enterprise account is for a specific number of concurrent users. You can create any number of users, but only the specific number can connect at one time. The Enterprise account allows you to translate an unlimited number of words each month.