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Tl;dr: Using Kinetic’s interactive email widgets, D2C jewelry & fashion brand Hey Harper ran A/B tests across 9 email campaigns, with a total of 632,000 recipients. The results speak for themselves: +335% placed orders & over $26.000 additional revenue.
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📈 +335% placed order rate (vs static email)
💰 3**.4x revenue per recipient**
📬 9 A/B tests across 632,000 recipients
Hey Harper is a direct-to-consumer jewelry and fashion brand known for its waterproof, durable pieces, e.g. necklaces, rings, earrings, bracelets, and watches, that are designed to withstand daily wear, sweat, showers, and even swimming. Founded in 2018, the company has a global reach, selling its stylish stainless steel, PVD‑coated jewelry in over 100 countries at fair price points.
Email is a key revenue driver for Hey Harper, enabling them to engage their global customer base with personalized offers, new drops, and promotional campaigns that drive repeat purchases. With its visual-forward brand, creating more engaging emails that allow customers to better engage and view products directly inside the inbox sounded like a no-brainer.
To test the effect of interactive emails on purchase behavior, 9 A/B tests were done across from May to July 2025 using Klaviyo’s A/B test functionality. Group A received static promotional campaigns as Hey Harper usually sends out. Group B received interactive emails with swipeable product galleries. To keep the significance high, nothing else was changed, i.e. subject line, preheader and copy were the same.
*"Honestly, it exceeded our expectations. Our interactive campaigns performed much better and support was hands-on when needed."
Being able to engage with a promoted product right in the moment, without a media break, is drastically reducing the friction during product discovery. Jewelry and swim wear are highly visual products where different product images and view angles can make or break a purchase decision. By including multiple images per product while still keeping the email highly consumable and appealing, Hey Harper enabled email subscribers to make this decision right in the inbox. This way, more recipients were engaged and hooked to then explore and buy products on their shop page.
Kinetic’s interactive widgets offer different levels of interactivity and a wide variety of use cases, of which product galleries are a rather simple one. Now that the positive effect of interactivity is proven, Hey Harper is planning multiple rollouts: