How Zizzi increased conversions by +3.66% with Speed Kit

Introduction

Zizzi, a modern Scandinavian fashion retailer known for stylish plus-size collections and contemporary apparel, places its e-commerce platform at the center of the customer experience.

For a style-conscious audience, effortless navigation, fast page loads, and a smooth shopping journey are essential — not optional. The digital storefront must reflect the same attention to fit, quality, and modern design that defines the brand's physical and product experience.

To meet these expectations, Zizzi partnered with Speed Kit to optimize the performance of its online shop. By accelerating page delivery and enhancing browsing responsiveness, Speed Kit helps create a seamless digital experience that mirrors the brand's commitment to comfort, confidence, and contemporary Scandinavian style — ensuring customers can explore and shop with ease from the very first click.

Solution

Zizzi already operates a high-performance storefront built on Salesforce Commerce Cloud, providing a modern and scalable e-commerce experience for its international customers. To further enhance performance and browsing efficiency, Speed Kit was integrated as an additional optimization layer.

By intelligently caching content and preloading the most relevant next steps in the customer journey, Speed Kit helps deliver faster page transitions and a smoother shopping experience across devices and markets. This results in measurable improvements in core performance metrics and user experience, complementing the already robust capabilities of the Salesforce Commerce Cloud platform and reinforcing Zizzi's commitment to a seamless digital shopping experience.

Results

Business Uplift: Our proof of concept with Zizzi was conducted across two distinct test phases covering both high and low sales cycles. This approach ensured a comprehensive evaluation under varying traffic and business conditions. The results were unequivocally positive: Speed Kit delivered a measurable uplift in performance and user engagement, achieving a 3.66% increase in conversion rate (CVR). The improvement was consistent across both test phases, demonstrating that the performance gains were not limited to specific periods but reflected a genuine enhancement of the customer experience.

Largest Contentful Paint (LCP): Our proof of concept with Zizzi demonstrated substantial improvements in website performance. Enabled pages loaded 47% faster, with a median speed improvement of 409 ms. This performance uplift highlights Speed Kit's ability to significantly accelerate page rendering and enhance the user experience, supporting Zizzi's commitment to delivering a fast and seamless digital shopping journey across its high-performance commerce platform.

Closing Statement

For Zizzi, performance is far more than a technical metric — it represents the digital expression of their modern and customer-focused brand promise. By integrating Speed Kit, Zizzi enhances the shopping journey from the very first interaction, delivering a fast, seamless, and highly responsive experience that mirrors the quality and accessibility of their fashion offering.

This improved responsiveness ensures that every visitor enjoys a smooth and engaging path to discovery, strengthening Zizzi's position as a forward-thinking retailer that values both user experience and digital excellence in its international online storefront.