Founded in 1998, AWeber used to be everywhere - I would see them as the recommended E-Mail marketer of choice until these monkeys from MailChimp popped up in 2001 and created a very user-friendly website for beginners to use and took over the industry. E-Marketing used to the be a large driving force of sales until Facebook and Google ads come along a few years later. E-Marketing is still a crucial part of any business, companies like AWeber can help you achieve a goal that you need.
While we prefer MailChimp over AWeber for the ease of use, if you're a beginner, AWeber has a better auto-responder and automation. You'll be able to build complete campaigns with triggers based on customer's actions. AWeber also has a strong drag and drop feature to create stunning emails. The only downside - it's a free trial for the first month, but there is no free subscription plan unlike MailChimp, which is always free until you reach your maximum subscriber list.