LemList is a service that provides personalized outreach email campaigns for sales, marketing and outreach teams. It enables users to automatically personalize and send thousands of outbound emails with attachments, and track detailed metrics such as opens, clicks, replied and more in real-time. ConvertKit on the other hand is an email marketing service designed to help entrepreneurs, bloggers and creatives build better relationships with their audience. It enables users to set up automated emails, segment and tag their contacts, and measure the results of their campaigns. Both help to automate tasks and improve communication, however, LemList is specifically designed for outbound email personalization, while ConvertKit is more focused on email marketing automation.