MailerLite is an email marketing platform that is specifically geared towards helping businesses streamline their email marketing campaigns and achieve better results for their campaigns. It offers features such as automation, powerful segmentation and personalization, deliverability optimization, and more. SalesLoft, on the other hand, is a sales engagement platform that is designed to help sales teams be more effective and efficient in their outreach and close deals faster. It offers features such as intelligent dialing, automated emails, advanced templates, and more. The main difference between MailerLite and SalesLoft is that MailerLite is focused on email marketing while SalesLoft is focused on sales outreach.