Aweber and Mailjet are two popular email marketing and bulk sending services. They both offer a range of features, but they differ in terms of pricing and the way they approach sending emails. Aweber is an autoresponder service that allows users to create, send and track emails. It provides advanced automation tools, detailed tracking and reporting, and excellent customer service. Aweber is ideal for small businesses, who may want to manage their campaigns themselves. Mailjet is a bulk email sender that has a more straightforward and affordable pricing structure than Aweber. It offers basic email tracking and reporting, but lacks out-of-the-box automated campaigns and advanced tracking tools. Mailjet is better suited for larger businesses who have their own experienced marketing team to manage the campaigns.