What I like about Mailchimp is that you can setup autoresponders such that only a subset of your email list will receive your follow-up emails based on when they signed up for your newsletter. For example, if I only want recent subscribers from the last month to receive one of my autoresponders, I can simply specify this using MailChimp’s autoresponder interface.
Alex GetResponse is a good service too. They have a smaller customer base than MailChimp or Aweber but they are definitely on the right track. You should consider your own options that will help you decide. For example, pricing, growth, support, reliability, deliverability, spam filters, etc. Make a list of these factors to compare on your own, you will also find such analysis around the web but those analysis could be biased towards one of the service. So you better do it on your own.
i know the benchmark, you can have 3 lists, all sent from 3 different companies, and if someone opts out, they get the choice if they are listed on other lists, to tick all the lists they are on, or just some. Does aweber and mailchimp do this? I have emailed mailchimp several times with the question but no answer yet, i am pretty sure they do not, so if someone opts out it is just an opt out from that list.
Email marketing has the highest conversion rates of any marketing channel. In fact, sixty-six percent of online consumers made a purchase after receiving an email marketing message — which is more than social and direct mail, according to the Data & Marketing Association. And transactions from email are three times more profitable than those made on social media, reports the global management consulting firm McKinsey & Company.