Litmus + Microsoft See how we're making email better with this historic partnership. Learn more

Optimize every email for the apps and devices your subscribers use

Find out how Litmus can help you


The quickest way to design, code, and test your ideas across 50+ apps and devices. Never send another broken email.

Learn more


Increase the performance of every email by testing across the apps and devices your subscribers use. Plus, get the most detailed performance data available.

Learn more


Send highly effective email at scale, track more detailed metrics with Email Analytics, provide your team or clients with access to all Litmus features, and more.

Learn more

Ready to test your first email? Get started for free

  • Linkedin logo
  • mailchimp logo
  • National Geographic logo
  • Jetblue logo
  • Zillow logo

Build and test with the only code editor built for email performance

Build your email in our web-based editor and get instant previews in 50+ email clients as you go. Every change you make updates your previews in real time, so you can build and troubleshoot faster than ever before.

Learn more about Builder
Cross browser and email testing enables us to test efficiently, and saves production time. — Kirsten Foster, iProspect South Africa

Test your emails everywhere before you send

See how your email appears in 50+ apps and devices and test links, images, subject lines, load time, and more before you press send.

Learn more about Checklist
Litmus has provided me the quickest and easiest way to test email projects for maximum compatibility. – Brian Thies, Thies Publishing

Get more detailed performance data and optimize for every inbox

See where your subscribers open and if they read, skimmed, or deleted your email. Track forwards and prints, pinpoint geolocation, compare engagement by device, and more.

Learn more about Analytics
Carey Marston
Litmus has been invaluable as we analyze our metrics and work to ensure our emails are cross-browser friendly. – Carey Marston, SmartPak

Works with your existing email provider

Litmus is not another email provider. It is a web application that works with all the major email providers. You don’t have to change the way you send emails. Litmus just works!

Mailchimp logo
Campaign Monitor logo
Salesforce logo
Experian logo
Hubspot logo
Silverpop logo