Campaign Monitor is an email marketing platform that allows users to create and send targeted emails or campaigns to a large number of subscribers. With a range of tools, users can create campaigns and track their performance. In comparison, Instant deployment is an email platform that delivers one-time, single emails to users in real-time. Instant messages are sent without having to manually initiate an email campaign, and are typically used for transactional communications. Both tools provide analytics to help measure success and drive actionable insights. The main difference between them is the ability to target specific audiences with a Campaign Monitor, while Instant delivery sends a one-time, real-time message without creating a campaign.