Cross-Channel Testing
Coordinate tests across your entire messaging stack
"Urgency" messaging outperformed "Exclusivity" across email and push channels. Email conversion: 3.2% vs 2.6%. Push tap rate: 5.1% vs 3.8%. Consistent winner across both channels.
A promotion that runs across email, push and SMS at once is only readable if each customer sees one creative approach everywhere. Send someone the “urgency” email but the “exclusivity” push and you can no longer say which messaging strategy actually drove the revenue. Campaign groups coordinate the test so assignment stays consistent across channels, while each channel is still measured on its own. Every campaign tests a single channel; the group ties them together so you can compare like with like.
How liftstack handles cross-channel testing
- Create a campaign group linking campaigns across several channels.
- Turn on shared assignment to keep variant labelling consistent across channels.
- Read a separate verdict per channel, on the metric that fits it: open rate for email, tap rate for push, click rate for SMS.
- Compare which channels deliver the strongest lift for each content strategy.
When to use cross-channel testing
Cross-channel testing earns its place during coordinated promotions: product launches, seasonal sales, loyalty events, any campaign where one message goes out across several channels at once. It answers what a single-channel test cannot, such as whether the approach that wins in email also wins in push, or whether a message lands differently by channel. Those answers let you tailor the creative per channel instead of assuming the winner in one place wins everywhere.