You can set up “rules” in AWeber to automatically segment your audience, but these rules simply subscribe or unsubscribe people from various lists. For example, when one person joins list B, they can be automatically unsubscribed from list A. This simple rule is particularly useful when you have a non-customer email list, and a customer email list.
MailChimp also has great customer support but when you’re using their free service, you probably won’t get instant response from their customer team. As you know, premium services always offer faster customer support whereas free services provide less customer satisfaction. As MailChimp only has email support whereas AWeber has email, phone and live chat customer support options.