SendGrid Email API and Email Marketing Campaigns | Twilio

SendGrid is an email delivery service providing APIs and SMTP relay for sending transactional emails marketing campaigns and notifications at scale with high deliverability rates. The platform offers email marketing features including templates contact management A/B testing and analytics for campaign performance. SendGrids APIs enable developers to integrate email sending into applications while maintaining compliance with email regulations like GDPR and CAN-SPAM. Twilio acquired SendGrid to combine email and SMS communications capabilities.