SendGrid is a cloud-based email delivery service that helps businesses send marketing and transactional emails. It provides tools for managing email campaigns, tracking performance, and ensuring that emails reach their intended recipients without being marked as spam. Founded in 2009, SendGrid offers a user-friendly platform that integrates with various applications and services. It supports features like email templates, analytics, and API access, making it easier for developers and marketers to communicate effectively with their audiences. In 2019, SendGrid was acquired by Twilio, expanding its capabilities in the communication space.