| N/A | SparkPost offered real-time analysis of email delivery and customer engagement as well as personalized email templates. The service has been discontinued. | $30 per month |
| N/A | Twilio SendGrid Marketing Campaigns provides users with segmentation, campaign editing, and deliverability. According to the vendor, Twilio SendGrid Marketing Campaigns is trusted by over 80,000 customers globally, including Airbnb, Spotify and Uber. Twilio SendGrid Marketing Campaigns aims to help users by providing: MORE EFFICIENT EMAIL BUILDING The campaign building process is free from frustrating, rigid step-by-step wizards that slow users down. The vendor says… | $15 per month |