SendInBlue

A lot of people consider SendInBlue the best alternative to Mailchimp. With over 70 responsive email templates, SendInBlue gives you totally authority over the looks & feel of your email campaign on every digital platform. The free plan gives you access to a vast array of templates, personalization, A/B testing, contact management, workflow editor, and real-time reporting, plus - its simple to use. The drawback could be its plans which are mentioned below-

Free plan features up to 300 emails per day & paid plans start at approx $25 per month.