Email • Email Tools • • 7 minutes READ Over 300 billion emails are sent every day, and the difference between a confirmation email landing in seconds and disappearing into spam can directly affect user experience, support load, and revenue. This article compares four leading transactional email services that prevent this from happening: Mailtrap, Mailgun, Amazon SES, and Postmark, across deliverability, developer experience, pricing, and support. Table of Contents hide 3.