MailChimp – has a free option to start, up to so many optins. However limited to 2 lists, with the free version. Did find the navigation difficult around the site. Easy integration of your forms, with MC several plugins provide forms which are compatible. Some weird behaviour though, many signups came from bots, found others online with same problem – didn’t find any solution.
GoodNews – Own Hosted Autoresponder – why doesn’t everyone opt to do this? Well unless you’re very careful , spam reports could cost you your site! So in most cases it pays to have a separate and professional company deal with your autoresponder. If you want to have a go, maybe just to start with then use Goodnews!
SendinBlue – This is highly recommended and the one I now use. Their helpline and staff are second to none and have your best interests in mind with their advice. Deliverability is Key with SIB, you’ll get an email if they think your level of sending is going to cause spam filters to become active. Site navigation could be better and the names – Automation and transaction were a little misleading. As was the integration between the forms and the lists on SIB site, which you can do with many indi form builders and free plugins or on SIB own site. Highly Recommended
Active Campaign – Top site Loads of features
GetResponse – As with Aweber, simple and straightforward
Drip – recommended by Andre Chaperon, the main man when it comes to email automation, so you have to go see if it has what you need at least.
Convert-Kit – This was built up by word-of-mouth by its founder Nathan Barry, in other words solely by recommendation. He actually listened to his customers and added the feature they wanted! Highly recommended for advanced Marketers
Aweber – Simple, straightforward, cheap though there is no free option to start with.