Sendgrid

An email API and marketing campaigns platform that enables sending transactional and marketing emails at scale with proven deliverability. It solves the problem of reliable email delivery for businesses communicating with customers. It targets developers and marketers, as well as companies of all sizes needing high-volume email infrastructure. It is delivered as a cloud-based API and SMTP service, with additional tools for campaign creation and management.

Key features

• Email API for transactional sending
• SMTP service for integration
• Marketing campaign builder for marketers
• Proven deliverability at scale