Who is Litmus. Litmus's email creation, testing, analytics, and personalization platform empowers marketers, designers, and agencies to confidently deliver quality, brand-aligned communications that delight and engage consumers. Over the last 15 years, we've built a reputation as thought leaders and one of the most trusted solutions in the industry, and it shines through our customers – all 250,000 of them, representing the world's top brands in ...