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The only code editor built specifically for email

Build, edit, and preview your emails in real time

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Secondary Pages Hero

The only code editor built specifically for email

Build, edit, and preview your emails in real time

Feature

Preview changes to your email in real time

Build your email in our web-based editor and get instant previews in 40+ email clients as you go. Every change you make updates your previews in real time, so you can build, test, and troubleshoot faster than ever before. Ensure your email looks great everywhere, every time.

Build your first email
Cross browser and email testing enables us to test efficiently, and saves production time. — Kirsten Foster, iProspect South Africa
Builder real previews
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Build the perfect email

Build your email in our web-based editor and get instant previews in over 40 email clients as you go. Every change you make updates your previews in real time, so you can build, test, and troubleshoot faster than ever before.

Know where subscribers open

See which email clients your subscribers use to better inform design decisions.

Scattered Features

Build the perfect email

Build your email in our web-based editor and get instant previews in over 40 email clients as you go. Every change you make updates your previews in real time, so you can build, test, and troubleshoot faster than ever before.

Instant previews

Get instant previews of your email in 40+ email clients as you're building. See your design in both mobile and desktop dimensions, ensuring compatibility across environments.

Builder

See code changes in real time

Every change updates your previews in real time. No more switching between your code editor and ESP—or manually check five separate devices—every time you make a change to your email.

Templates

Build your email from scratch, or create your own template. You can also choose from one of our pre-tested and customizable templates that work everywhere.

Grid view

Grid view

Easily navigate your code—click on any HTML element in the preview pane and land on that element directly within the code editor.

Secondary Features

Cut your development time in half

Designing email doesn’t have to be so frustrating.

Inlining blue

CSS inlining

Automatically inline your email’s CSS with a simple toggle and style your emails faster and easier than ever before.

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Snippets

Create reusable snippets for commonly used elements, like bulletproof buttons and preheader text.

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Timeline

View your entire email’s history. See who made changes and when and easily restore any version at any time.

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Sharing

Create a public version of your email to share with others or embed on any site with a single click.

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Images on and off views

Toggle images on and off to see ALT text, optimize your email for image blocking, and ensure your CTA is visible.

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Responsive views

Ensure that your email is easy to interact with in all environments by viewing it in both mobile and desktop.

Secondary Features (Light)

What can Checklist do for you?

Your subscribers view email in a variety of different apps and devices, each with their own rendering quirks that affect performance. Checklist gives you previews of your email in popular inboxes, and validates that your links, images, and tracking work properly.

Pulse green

Optimize by device

Seeing an increase in mobile opens? Consider using responsive design to provide your mobile subscribers with the best email experience possible.

Pulse green

Optimize by device

Seeing an increase in mobile opens? Consider using responsive design to provide your mobile subscribers with the best email experience possible.

Pulse green

Optimize by device

Seeing an increase in mobile opens? Consider using responsive design to provide your mobile subscribers with the best email experience possible.

Pulse green

Optimize by device

Seeing an increase in mobile opens? Consider using responsive design to provide your mobile subscribers with the best email experience possible.

Pulse green

Optimize by device

Seeing an increase in mobile opens? Consider using responsive design to provide your mobile subscribers with the best email experience possible.

Pulse green

Optimize by device

Seeing an increase in mobile opens? Consider using responsive design to provide your mobile subscribers with the best email experience possible.

Combined Features
Sheriff green

Reputation Check

Get your IP addresses and any domain names used in your email checked against known blacklists, and get notified if any of them could affect your delivery.

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Actionable Advice

Not only do we show you your spam score, we also explain why you got that score. This advice helps you adapt your email's content to improve delivery rates.

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Sender Verification

Verify that email authentication methods such as DKIM, DomainKeys, SenderID, and Sender Policy Framework are set up correctly.


Radar

Scanned by every major spam filter

Tests include spam filters from ISPs and webmail providers, and corporate filters.


Server-side filters

  • Barracuda
  • Messagelabs
  • Postini
  • SpamAssassin

ISP Filters

  • AOL Mail
  • Gmail
  • GMX
  • Mail.com
  • Outlook
  • Yahoo! Mail
Isolated features (used on agencies)

Organize and manage access

Create private teams to control user access across clients, departments, or customers.

Persona Tabber

Builder for Designers

Build client emails

Build email templates for clients using our HTML-specific email builder, no more switching between different tools and programs. Builder allows you to test and iterate in real time, right in Litmus.

Hundreds of templates

Create consistent templates and branding across your team with a saved template library and saved code snippets that can be shared across your teams.

Learn more

Builder for Marketers

Run through a pre-flight checklist

Get guided checks of the most critical elements that affect your email performance before you press send

Optimize your first impression

Increase opens by verifying that your subject, from name, reply address, and preview text are optimized.

Version control

Catch broken links and images and verify that your tracking works properly before you press send

Builder for Agencies

Build client emails

Build email templates for clients using our HTML-specific email builder, no more switching between different tools and programs. Builder allows you to test and iterate in real time, right in Litmus.

Hundreds of templates

Create consistent templates and branding across your team with a saved template library and saved code snippets that can be shared across your teams.

Learn more
Features Single
Litmus story

Litmus story

Founded in 2005 by childhood friends, Paul Farnell, Matthew Brindley, and David Smalley, Litmus began as a cross-browser testing tool. Shortly thereafter, they recognized another need in the design and marketing field—email testing. And email has been our focus every since.

Overtime, we’ve expanded our platform to include email creation, testing, and analytics tools, empowering marketers, designers, and agencies to deliver superior subscriber experiences. Today, we help more than 250,000 marketers make email better. It’s been an amazing journey, and we look forward to continuing to help you create more possibilities with email.

Team Members
Paul farnell
Paul Farnell

CEO, Co-Founder

Matthew brindley
Matthew Brindley

CTO, Co-Founder

David smalley
David Smalley

CPO, Co-Founder

James halliday
James Halliday

Integrations Manager

Brendan caffrey
Brendan Caffrey

Engineering Director

Justine jordan
Justine Jordan

VP, Marketing

Paul farnell
Paul Farnell

CEO, Co-Founder

Matthew brindley
Matthew Brindley

CTO, Co-Founder

David smalley
David Smalley

CPO, Co-Founder

James halliday
James Halliday

Integrations Manager

Brendan caffrey
Brendan Caffrey

Engineering Director

Justine jordan
Justine Jordan

VP, Marketing

Location

Litmus Boston

675 Massachusetts Avenue, 11th floor

Cambridge, MA 02139

Litmus London

Floor 3, 9 Devonshire Square

London EC2M 4YD

Video

Working at Litmus

Stay up-to-date on the latest email news, trends, and new ways to improve your subscriber experience

We’re a tight-knit team that’s passionate about helping the world send better email. We’re lucky to work alongside some of the smartest people in our industry, all while serving the most creative and supportive customers around. We’ve built a team that does great work and has an awesome time doing it.

While many of us work from offices in Boston or London, nearly 50% of our team works remotely from wherever they happen to be. And no matter where you are, you’ll find the tools, benefits, support, and culture to succeed and be happy. And, we’re always looking for more innovative, smart people to dive in and get their hands dirty with us!

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