Yes, I use one called Sendy (https://sendy.co/). Subscription-free, one time payment of $59 and emails sent through Amazon SES. As a small business owner, I have no idea why someone would use MailChimp over this.
Sendy looks cool (thanks for the link) but you have to install it, host it, maintain it and from the looks of it, purchase it again every new major version. Most small biz owners (from my exp) are not looking for that sort of involvement. If you're a startup/small tech co. it makes sense.
