How can I see the total count of subscribers at the end of each month?

The Growth tab under the Mail Groups section of the Mail House allows you to track the overall cumulative and  non-cumulative data related to your subscribers, unsubscribers, Hard Bounces and existing sendable contacts.

This can be helpful in giving a big picture outline of the successfulness of your mail outs, the way your recipients have reacted to them and the amount of people who you have previously, currently are and will eventually, be marketing to.

You will be able to see how each month performs in terms of the increase/decrease of subscribers by hovering over each indicator for the respective month.