Litmus

Litmus is an all-in-one email marketing platform that empowers teams to create emails their subscribers will love. Over 800,000 marketing professionals worldwide, including 80% of the Fortune 100, have relied on Litmus as a core component of their tech stack since 2005.

Originally created to provide marketers with better email testing tools, Litmus’ capabilities now improve every part of your email creation process including building, personalizing, monitoring, and analyzing your sends. Their support team is always ready to help, boosting a 98% customer satisfaction rating! In addition to user-friendly tech, Litmus is a go-to resource for email thought leadership, best practices, State of Email reports, and more.

In April 2025, Litmus was acquired by Validity, the leading provider of marketing success and customer data intelligence solutions including BriteVerify, Everest, and DemandTools. The combo of these tools empower sales and marketing professionals to make every send count®.