Litmus provides an email marketing platform that helps businesses improve their email campaigns to increase conversions and return on investment (ROI). The platform includes tools for email testing, analytics, and optimization, allowing users to preview emails on various devices and email clients, test for spam, and analyze performance. Litmus also uses AI to assist users in creating effective subject lines and copy. Unlike many competitors, Litmus offers a subscription-based model with different pricing tiers, catering to a wide range of clients from small businesses to large enterprises. The goal of Litmus is to enhance the effectiveness of email marketing for its users through advanced security features and seamless collaboration tools.