Promix Nutrition Case Study
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How Promix Turned Retention Into a Growth Engine

Zettler Digital helped Promix Nutrition build a retention engine that drove $6.5M in attributed revenue through advanced Klaviyo and SMS strategy — laying the foundation for what has since become one of the brand’s strongest growth channels.

About Promix Nutrition

Promix Nutrition is a leader in clean-performance supplements, trusted by professional athletes and high-performance consumers alike. With strong acquisition channels already in place, the brand’s next opportunity for growth was retention — turning first-time buyers into long-term loyalists.

Zettler Digital was brought in to transform Promix’s email and SMS strategy into a sophisticated, revenue-driving system. The goal was simple: make lifecycle marketing a predictable growth engine that could compound over time.

The Challenge

Strong Acquisition, but Under-Optimized Retention Infrastructure

Promix had an established, loyal customer base and steady growth — but its lifecycle marketing systems weren’t keeping pace. The existing Klaviyo setup lacked depth in segmentation, automation, and creative consistency, limiting the brand’s ability to re-engage customers effectively.

To sustain momentum, Promix needed a retention framework engineered for scale — one capable of balancing storytelling with data-driven precision.

Key objectives included:

- Increase repeat purchase and subscription retention

- Personalize messaging through behavioral segmentation

- Improve flow strategy, cadence, and creative performance

- Unify data visibility across Klaviyo, Shopify, and subscription platforms

The Solution

Rebuilding Email/SMS from the Ground Up

Zettler Digital completely restructured Promix’s retention ecosystem on Klaviyo, designing an automation and segmentation architecture built for growth.

Core initiatives included:

- Comprehensive Klaviyo rebuild, optimizing all major flows — welcome, post-purchase, replenishment, winback, browse/cart abandon, and VIP.

- Segmentation overhaul, mapping frequency, order value, and purchase timing to create more personalized journeys.

- Subscription-specific flow logic to improve retention and reduce churn.

- Dynamic content modules showcasing relevant products, bundles, and education per customer segment.

- Email + SMS alignment, establishing an integrated cadence for maximum engagement without redundancy.

- Creative and testing framework to optimize design, subject lines, and conversion incentives.

- Tool integrations and data connections across Shopify, Wonderment, Elevar, Junip and more. ensuring lifecycle data flowed seamlessly between platforms for accurate targeting and performance tracking.

The Results

Retention that Drives Measurable, Scalable Growth

Promix’s lifecycle marketing channels evolved into a key revenue driver for the brand — both in short-term performance and long-term impact.

  • $6.5M

    during first two years

  • +26%

    90-day retention rate

  • +34%

    60-day LTV

“

"Ben and his team are extremely responsive, not passive and actively make suggestions to improve performance. It has been a great overall experience working with Zettler Digital to execute our email and SMS marketing on Klaviyo.

”
AvatarAlbert MathenyCEO, Promix Nutrition

Built For Scale, Proven to Last

Promix’s journey shows how a well-engineered retention program can evolve from a tactical channel into a sustainable growth engine. Through data-driven automation, refined segmentation, and integrated performance tracking, Zettler Digital helped transform lifecycle marketing into one of the brand’s most profitable assets.

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