Do AI subject line tools actually move open rates?

Ran A/B tests on weekly campaigns for six weeks. AI-suggested subjects vs our human-written control. Net result: basically flat, sometimes worse.

Maybe our brand voice is too specific for generic suggestions. Maybe subject lines are not where AI helps. Where have people seen real lift?

#ai-generation#mailchimp#klaviyo

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Sorted by best · 203 thread votes

- @lena_does_lifecycleLifecycle @ DTC brand2 weeks ago
  Subject line AI alone felt like a gimmick to us too. The lift showed up when AI handled full email generation with brand context, not just the subject field.
  44
- @deliverability_danDeliverability consultant2 weeks ago
  Also check placement before blaming copy. A subject line test is useless if half the segment landed in promotions.
  36

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