Klaviyo: Set up AI-optimized A/B tests

Klaviyo·Dec 2025

Demo summary

Walks through creating an A/B test for subject lines and configuring the AI to automatically send the winning variation or personalized versions to the remaining audience.

Step-by-step

Click Create A/B test
Create multiple versions of your email campaign with different subject lines
Select the metric Klaviyo should use to determine the highest performer
Choose how to use the outcome: send the winning variation or personalized variations to the remaining audience

Options

Send the winning variation to the rest of the audience
Send personalized variations based on recipient data

Watch out for

You must select a specific metric for Klaviyo to determine the highest performer

Tips

Use the insights over time to identify trends and get a deeper understanding of your audience

All demos from “How to Use AI for Email Marketing Campaigns”

1:280:36Generate email subject lines with AIShows how to use Klaviyo's subject line AI to generate and select optimized subject lines based on campaign context.Klaviyo· Design a newsletter / email (drag-and-drop editor)
2:041:27Draft email content with AIDemonstrates using the 'draft email content' AI button to generate full email layouts and copy from a text prompt, including section-specific AI generation.Klaviyo· Design a newsletter / email (drag-and-drop editor)
3:310:27Add dynamic product feeds to emailsShows how to drag a product block into an email and set it to 'dynamic' to automatically recommend products to recipients based on store data.Klaviyo· Integrate with Shopify / store / CRM / other apps
4:031:01Set up AI-optimized A/B testsCurrentWalks through creating an A/B test for subject lines and configuring the AI to automatically send the winning variation or personalized versions to the remaining audience.Klaviyo· A/B test a campaign
Watch “How to Use AI for Email Marketing Campaigns” →

A/B test a campaign

33:461:17Setting up A/B tests for Klaviyo signup formsShows how to use the 'Create A/B Test' feature in Klaviyo to test different offers (e.g., 20% off vs. mystery discount) and configure manual weight settings.Emiel Dingemans from Magicianly | Email Marketing
4:031:01Set up AI-optimized A/B testsCurrentWalks through creating an A/B test for subject lines and configuring the AI to automatically send the winning variation or personalized versions to the remaining audience.Klaviyo
48:081:31Adding a 'Micro-Yes' Step to Signup FormsDemonstrating how to add an initial commitment step to a form to increase overall conversion rates.Emiel Dingemans from Magicianly | Email Marketing
3:22:321:32A/B Testing Campaign Send TimesSetting up a send-time split test to determine which hour generates the highest 'Placed Order' rate.Emiel Dingemans from Magicianly | Email Marketing
3:36:500:47Set up A/B tests in Klaviyo flowsDemonstrates the 'conditional split' method for A/B testing flow emails to compare performance metrics directly in the flow builder.Max Sturtevant