Information about your database size can be found by going to "Settings" -> "App settings" -> "Additional" -> "Database size".
All profiles in your database, including anonymous users and profiles with the same email address, are counted separately.
A contact is a person in your database who has at least one of the following characteristics:
- email address
- phone number
- conversation on chat
These are the contacts you are charged for. More about our billing system here.
Users with the same email
"Users with the same email" tracks the number of email addresses that are used in more than one profile (e.g. if email address firstname.lastname@example.org is found in three different user profiles, the number will be 1, because, in the end, it's the same person).
You can merge users in the section People.
If you want more information about deduplicating users, please, read this article.