Multiple variants
Test 2, 3, or more subject-line options against the same campaign body.
A/B Testing
Find the subject line that earns the open.
Test 2+ subject-line variants against a sample of your audience, pick the winner against open or click rate, and ship the winner to the rest. Most campaigns improve by 10-30% with one round of testing.
Capabilities
What it does.
Sample-size control
Choose what fraction of the audience receives the test (10%, 20%, 30% are common).
Winner metric
Pick open rate, click rate, or click-to-open rate as the deciding metric.
Auto or manual winner
InboxTrace picks the winner once the sample finishes — or you can call it manually before the timer ends.
How it works
Step by step.
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01
Compose body once
Build the campaign body and content as normal.
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02
Add subject variants
Add 2+ subject-line options.
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03
Configure rules
Sample size, winner metric, duration before deciding.
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04
Send
Sample receives variants; winner ships to the rest. Report shows lift.
InboxTrace Campaigns
Get Subject Line Testing on day one.
Self-hosted email at the scale you need, on the servers you choose. Per-server pricing, full stack control, external sending nodes via Bridges, and InboxTrace Machine when you want it managed.