Please note that contacts are available only on Marketing and Creator plans.
You can easily track previous changes to the number of contacts in the Contact History tab. It is located on the Contacts page of your dashboard:
By default, this page displays the history of your All Contacts list. However, you can add up to 10 additional lists to track their history by following these steps:
Navigate to Contacts.
Click the three-dot menu next to your chosen list or segment (except All Contacts, which is already included in the Contact History).
Select Edit List (or Edit Segment if editing a segment).
In the pop-up window, enable "Track list history" or "Track segment history", then click Save.
Afterwards this list or segment will be visible in Contact History:
The Contact history list is updated once a day for the "All Contacts" list and for those lists and segments that have the tracking enabled.
If any further clarification is required, we are available to you every day at any time. Please contact our 24/7 Customer Support to get the necessary assistance. We are always happy to help!