Postmark

Postmark specializes in ensuring that critical, application-generated emails reach their recipients' inboxes quickly and reliably. Unlike bulk email services, Postmark is built from the ground up for transactional emails such as password resets, welcome emails, and notifications, which demand high deliverability and speed. It provides a robust Email API and SMTP service, making it easy for developers to integrate email sending into their applications. The platform offers features like Message Streams to categorize different types of email traffic, detailed analytics for tracking email performance, and tools for handling inbound email. This focus on transactional email quality helps businesses maintain strong customer communication and ensures that essential messages are never missed, contributing to better user experience and retention.