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Mailgun is a developer-focused email delivery platform that empowers companies to send, receive, and track transactional and marketing emails through an API. Founded in 2010, Mailgun became a Y-Combinator success story later acquired by Rackspace. In February 2017, Mailgun spun back out as a standalone business focused on building best-in-class email deliverability solutions. We are headquartered in San Antonio with remote teams in San Francisco and Austin. Customers like Slack, Lyft, Github, and Reddit rely on Mailgun to deliver email to their customers.

SendGrid specializes in transactional and marketing email delivery at scale, providing the technical infrastructure that powers email communications for thousands of applications and websites. The platform excels at handling high-volume email sending with reliable delivery rates and detailed analytics that show exactly what happens to each email sent. Developers appreciate SendGrid's robust API that allows applications to programmatically send emails, manage contacts, and track engagement, making it the foundation for email functionality in countless SaaS applications. The platform's email validation and reputation management tools help maintain sender reputation, ensuring emails reach inboxes rather than spam folders. While SendGrid offers marketing email features, its true strength lies in technical email delivery, making it the preferred choice for development teams who need reliable email infrastructure that integrates seamlessly with their applications.