Stop guessing. Start proving what works.
Test subject lines, send times, and content variants, then automatically send the winner to the rest of your list.
Better sends, backed by data.
Subject line tests
Send two subjects to a sample, pick the winner by open rate, then blast the rest.
Send time tests
Find when your audience actually opens, morning vs evening, weekday vs weekend.
Content variants
Test hero copy or CTA placement on Growth plans, not just the subject.
Set it once. Let the data decide.
Choose sample size, winning metric, and wait window. We handle the split send and rollout.
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Winner by opens or clicks, you pick the metric that matters. -
Configurable test audience, 10%, 20%, or custom sample. -
Automatic holdout until the test window closes. -
Results in the campaign report with clear A vs B charts.
Run a test in four steps.
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1
Create your campaign Build the email as usual, duplicate for variant B if testing content.
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2
Enable A/B Add a second subject or content variant and set sample percentage.
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3
Send the test We deliver variant A and B to the sample group first.
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4
Roll out the winner After the wait period, the winning version goes to everyone else automatically.
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