Litmus from Validity Higher email ROI starts with Litmus.

Bring your entire email workflow—from design and building to boosting deliverability—into one user-friendly platform.

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We have your back. Always.

Create moments your subscribers will love.

Litmus helps marketers quickly build and deliver personalized emails at scale.

Anyone can build emails.

Create emails in minutes using templates, code modules, and brand assets—with or without HTML skills.

Email building

Cut your QA time in half.

Test as you build on 100+ email clients—including Dark Mode—and manage all feedback directly in Litmus.

Email testing

Trust that your sends deliver.

Monitor emails 24/7 for automation, delivery, and authentication issues—and fix it before it hurts engagement.

Email monitoring

Hear from Litmus users

“Litmus makes it a lot easier for us to QA dynamic content in one place and create efficiency for the team. It helps us maintain productivity and reduces costs by eliminating the need to own and maintain a variety of devices.”

Rhonda Johnson, Vice President of Digital Campaign Services at Epsilon

“We use Litmus to code, build, test, and experiment with our designs while viewing in multiple clients. It helped us greatly to see what works and what doesn’t while maintaining brand consistency. I love how we can tweak the code and it will update the designs across the email clients while we test.”

Randy Mango, Email Marketing Producer, Digital Marketing at Girl Scouts

Learn how businesses like yours win with Litmus.

“Email marketing is cost efficient and delivers quantifiable results. With Litmus we can truly optimize our email marketing strategy and execution, resulting in the best possible customer experiences and ROI.”

Jason Ribovitch

National Bank of Canada

Read customer story