Bring all your customer engagement ideas into reality.
Explore how our platform helps drive impact.
Designed to help you scale, flex, and innovate.
Explore developer resources for APIs, SDKs, and release notes.
Discover best practices, tips, thought leadership, and more.
Find a service partner or apply to become one.
Learn from industry leaders and customers to help you grow.
We educate, collaborate, and advocate for your success.
Keep your data secure with compliance and best practices.
Access eBooks, guides, and more for better customer engagement.
Connect with and learn from power users.
About Litmus
Litmus is a testing service for web and marketing professionals.
It allows people to cross-browser test their websites, and test their email newsletters across a range of email clients and spam filters.