Email Warmup is a company dedicated to enhancing email deliverability to ensure that outbound emails increase sales rather than being marked as spam. They utilize Rollbar, a monitoring tool, to oversee their backend systems, particularly focusing on email deliverability algorithms and campaign management tools. Rollbar's integration with Slack provides real-time alerts, helping to prevent small issues from escalating and affecting email performance. The company chose Rollbar for its intuitive dashboards, easy setup, and ability to prioritize critical issues effectively, enabling them to deliver consistent and reliable service to their clients.