FYIKlaviyo · SMS & WhatsApp · Wed, Nov 4, 2026

Klaviyo Personalized Content launches for SMS flows: each shopper gets adapted copy that still has to beat your original

What changed

Klaviyo's Nov 4 Personalization launch post says Personalized Content is now available in Klaviyo Personalization for English SMS (and RCS text) in six flows: Added to Cart, Viewed Product, Started Checkout, Back in Stock, Price Drop and Win Back. It reads browsing, cart activity and RFM to reframe the message while keeping your links, offer and variable tags, then runs each personalized version as a controlled test against your original. Variants must pass length, link, compliance and brand-voice checks or the shopper gets the original. Results stay hidden until they are statistically meaningful. A future grader model will pick variants by predicted engagement; today that model is not live.

What to do

If you are on Klaviyo Personalization, open one of the six SMS flows, turn on "Personalize this message," set brand voice, preview samples, and leave the built-in test running for a couple of months before judging it. If you are not on Personalization, skip this — it is not a free account toggle. Don't rewrite the same flow with hand-built splits while the test is running, or you will muddy the comparison.