Email content analysis

Updated August 17, 2026

Email inboxes are noisy these days, and providers have taken steps to filter messages. Our AI-powered content analysis feature helps you understand your email content and improve deliverability so that your messages aren't inadvertently filtered out.

Not seeing this AI feature?

Make sure “Customer.io AI” is enabled in AI settings. Reach out to an Account Admin if you can’t edit the toggle.

How it works

When you work on an email in your automation, broadcast, or one-time send, you can click Analyze Email Content to review your email and highlight ways you can improve deliverability so your message gets to the audience you want to build relationships with.

AI email content analysis button

Wait until you've finished writing your email

For the best results, wait to analyze your email until you finish writing it. This ensures that we provide the most relevant suggestions for your message.

Analyzing an email

In the top-right corner of the email composer, click Analyze Email Content.

AI email content analysis

Analysis report

Content analysis checks your message for common deliverability issues, like:

  • Trustworthiness: Does your message look credible? Could a user interpret it as spam?
  • Clarity: Is your message clear and easy to understand? Does it have a clear call to action?
  • Brand: Is your message consistent with your brand’s voice and tone?
  • Issues with liquid: Are there issues with liquid that could prevent your message from being sent? For example, if you specify an attribute like {{ customer.first_name }}, but the attribute is not set, your message won’t send. You can fix this kind of issue by adding a fallback value for the attribute!
AI email content analysis report