Get unlimited testing on the most intelligent email pre-deployment platform in the industry. 

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Why leading brands choose Email on Acid over Litmus

Just a few of the brands using our platform

The choice is easy


Teamwork is fast and effective with streamlined collaboration tools that allow you to share, comment, edit, review, and resolve directly within the app.

  • Unlimited share links, adjustable permissions, and a disable feature  
  • Pins, commenting, approval, and voting capabilities  
  • Unlimited guest access (no account required) 
  • Quick and easy status notifications


We make email editing easy for everyone - from senior email developers to first-time email marketers, the Email on Acid HTML editor helps automatically pinpoint issues and shows you how to fix them.

  • Choose from our library of email templates or bring your own 
  • Find and fix issues directly in your HTML 
  • Run email previews in real time to validate changes 
  • Get complimentary image hosting up to 1GB


Track essential elements of your email program with analytics and insight that will help you learn more about your subscribers, find useful patterns, and make informed decisions about your email strategy.

  • Engagement threshold tracking like read, skimmed, and deleted times 
  • Open, click, and link tracking  
  • Recipient activity heatmapping  
  • Device and client tracking  
  • Geolocation data 
  • Downloadable raw data
  • Bot detection


Our configurable pre-deployment workflow fits seamlessly into your email production process, making it easy to catch mistakes and deliver high performing emails in less time.

Content Checks

Inbox display preview  •  Accessibility check   •  Link validation Image validation  •  Spelling and profanity check


Spam check  •  Domain blocklist check

Email Previews

Unlimited previews on 100+ of the latest devices and clients

Every campaign, every email

Helping you deliver email perfection

Weighing the benefits of Email on Acid vs Litmus?

You should never have to make sacrifices when it comes time to send the perfect email, so we offer unlimited testing at all plan levelssupport you can count on, and affordable pricing.  And, our platform is completely sender agnostic, making it even easier to use with your current (or future) email provider.

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Unlimited testing

Scale your email program without limitation. Enjoy unlimited testing at every plan level. 

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Superior support

Having an email expert that you can rely on makes all the difference. Send smarter with guidance from our US-based support team.  

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Affordable pricing

Email perfection shouldn’t have to break the bank. We have affordable plans for everyone from freelancers to large-scale enterprises.

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Deeper insight

A good email strategy goes a long way. Make informed decisions with comprehensive recipient insight and reporting.