# Mailchimp AI: subject lines only?

*@beehiiv_user | Comparisons | 1 year ago*

Sharing a pattern we landed on after a messy migration. Creation layer separate from sending record. Curious who else runs this split.

Specifically interested in A/B testing and on-brand output.

## Comments

**pref_center_paul** (43 votes): Customer.io is strong on journeys but you own the behavioral schema.


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[View on Email Agora](https://emailagora.co/posts/mailchimp-ai-subject-lines-only-32)