What are some alternatives?
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Printfection - Printfection provides online marketing tools that let businesses buy, manage, and send promotional products.
SendGrid - Learn why more developers choose SendGrid for their email deliverability service to send transactional emails triggered by web apps. Get started for free
Terminus - Terminus is an account based marketing platform for B2B marketers.
Mailgun - A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.
Triblio - Triblio is an account-based marketing software that enables marketers to personalize multichannel campaigns to reach their target audience.