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A/B test a subject line

Send two subject or preview variants to a split list and compare how each performed.

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Two variants, both real sends.

The A/B test option in the broadcast wizard's email step

Before you start

Start a broadcast and reach Step 2 (Email).

1
In the broadcast wizard's email step, enable the A/B test on the subject or preview text.
2
Write variant A and variant B.
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Change one thing so the result means something.

3
Continue to schedule and send. Your list splits roughly in half, and each half receives one of the two versions. Both versions are real sends.
4
Compare the results: open the broadcast and check its Variants tab for each version's open rate, click rate, and more, side by side.
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See which version won.

Tips and good to know

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Kannlicit does not automatically send the winning subject to anyone else; the test is the send. Use what you learn in your next broadcast.
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Test one element at a time (subject or preview) so you know what made the difference.
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Inside automations, A/B testing works through random split steps, and results show in that automation's analytics with the winner marked.
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Compliance still applies to both variants: no inducement framing or urgency in a subject line.

Common questions

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