SparkPost offered real-time analysis of email delivery and customer engagement as well as personalized email templates. The service has been discontinued.
SparkPost is great for automated sending of transactional emails. It appears to be designed for developers—it does not allow the creation and sending of emails from within the SparkPost user interface. If you're building a software system that needs to send emails, SparkPost is a great choice, but it is not a CRM.
Would give it a zero if I could. Their customer service used to be incredible; fast response times, really hands-on with their users, and a pretty regular feedback process. They sent me an awesome t-shirt that became part of my go-to climbing gear. But for the past year, their response times went way down, their customer service was less helpful and generally a lot more rude, and they haven't asked for customer input once since their leadership change
I'd say SparkPost is probably the worst option of the three email API products I've used. It has the worst customer service, the fewest features, and costs significantly more than SendGrid, even though SendGrid lets you integrate all of Twilio's other features into a broader set of communications media. In addition, the API and documentation were easy enough to use and integrate, but the templating system has also caused a lot of headaches for us.
