Surge adds predictive hero intelligence to the campaigns you're already building in Klaviyo. Instead of switching to a different tool, you stay in your ESP and let Backstroke handle the hero optimization behind the scenes. You pick the hero images, Surge predicts which one performs best for each audience segment, and delivers a ready-to-use content block you drag into your Klaviyo email.
What Surge Does
Today, when you build a campaign in Klaviyo, you pick one hero image and send it to everyone. You might suspect that different audiences respond to different visuals, but testing hero variations manually — building segments, creating conditional content blocks, managing merge tags — is tedious enough that most teams skip it.
Surge eliminates that work. It automatically detects your draft and scheduled campaigns from Klaviyo, lets you upload 2–10 hero image variations, predicts which hero will perform best for each audience segment, and generates a smart content block that handles the personalization for you. You drag one block into your email in Klaviyo and send. Each subscriber sees the hero predicted to drive the highest engagement for their profile.
