Warmup Inbox vs. Mailtrap

Warmup Inbox is an email warmup service that automatically raises your email sending reputation through our network of inboxes talking to each other. The process of preparing an email address for general use or email outreach is commonly referred to as “Warming Up” an inbox, where you take a number of steps to ensure that an email address does not become deactivated, blacklisted, or automatically marked as spam when it begins to send outgoing messages to other recipients.

Mailtrap: Email delivery platform for product-based companies that send at scale. Mailtrap is an email delivery platform built to help product companies ensure fast email delivery and high inboxing rates. It combines three core products: * Email API/SMTP — reliable RESTful API and SMTP service for sending transactional and bulk emails. * Email Marketing — to create, schedule, and send impactful promo campaigns that make a difference for you and your customers.