The 26.79x Return: Scaling Sarah Flint’s Repeat Orders with AI Automation
The 26.79x Return: Scaling Sarah Flint’s Repeat Orders with AI Automation
26.79x
ROI
12.02%
Total Flow Revenue
In luxury footwear, timing is everything. We worked with Sarah Flint to replace standard email timers with Retentics, an AI tool for Klaviyo. The goal was to stop guessing when a customer might buy again and use data to know for sure. By switching to this AI model, we built a system that generates nearly $27 for every $1 spent on the software.
In luxury footwear, relying on standard flow triggers for replenishment and repeat orders is a recipe for leaving money on the table. We worked with Sarah Flint to move beyond event-based timers and toward a predictive model that identifies purchase intent before the customer even returns to the store.
By replacing standard flow triggers with Retentics inside Klaviyo, Sarah Flint didn’t just optimize existing automations; they unlocked a system that generates nearly $27 for every $1 spent by reaching customers at the exact moment they’re most likely to buy again.
By targeting forecasted intent rather than static trigger rules, they turned routine replenishment and repeat order flows into a scalable revenue multiplier.
The Efficiency Framework
We didn't look at open rates or clicks. Instead, we looked at the unit economics on how much money our tool makes compared to what it costs.
The Software-to-Sales Multiple: We compared the monthly cost of Retentics against the total revenue it created.
The "Always-On" Revenue: These five AI flows run 24/7. They make sure the brand reaches out exactly when a customer is ready for their next pair.
The Main Metric: 26.79x Revenue Efficiency
The clearest way to measure performance is through revenue efficiency — how much revenue is generated per $1 of software spend.
The Sarah Flint Result: 26.79x
The Impact: For every $1 invested in Retentics, the engine generates $26.79 in attributed revenue. This level of leverage makes it one of the most efficient tools in the brand’s tech stack.
The 12.02% Revenue Contribution: A New Flow Standard
Efficiency is only half the story; the other half is scale. While standard automation handles the basics, the AI-driven Retentics engine has moved from a "supplemental" tool to a core pillar of the Sarah Flint digital strategy.
In a highly optimized Klaviyo setup with dozens of active triggers, these five AI-powered flows now account for 12.02% of total flow revenue.
The Sarah Flint Result: 12.02% Revenue Contribution.
The Impact: By replacing generic timers with predictive intelligence, a small subset of the email library now drives a double-digit share of automated revenue. High-intent timing consistently outperforms high-volume sending.
The AI-Powered Flow Suite
We set up five specific flows in Klaviyo to capture revenue at the right moments:
Replenishment Flow: Reminds customers to reorder exactly when they are likely running out.
Low Inventory Flow: Sends a high-urgency note when a customer’s favorite item is almost out of stock.
First Purchase Bounce Back: Strikes while interest is high to turn a first-time buyer into a repeat customer.
Winback Flow: Reaches out to old customers at the perfect time to bring them back.
Price Drop Flow: Alerts shoppers when a product they liked goes on sale.
Inside the Engine: A Real Look at the "Perfect Round Toe Pump"
This isn't a guess — it’s a direct look at the actual data inside Sarah Flint’s account. While our system tracks hundreds of different buying patterns across the store, this deep dive into the Perfect Round Toe Pump shows how a customer's needs change over time.
One Segment, Multiple Intent Windows: Even within this one group of customers, the "best next move" changes. Our data shows several different peaks in interest, with two main windows driving most of the repeat sales:
The 149-Day Pulse (Style Expansion): When a customer returns quickly (around 5 months), they usually aren't looking for a replacement. Since they already know the shoes fit and feel great, they are most likely to buy a new color (like Cognac) to grow their collection.
The 258-Day Pulse (Core Replenishment): At the 8.5-month mark, the goal shifts to a "Refresh" cycle. After nearly three-quarters of a year of wear, the customer typically returns to re-order a fresh pair of their original, classic black pumps.
This proves that "ready to buy" is always changing. Whether the system triggers a new color or a fresh basic, it recalibrates in real-time to match the actual lifecycle of the customer’s wardrobe.
The Final Result
The Sarah Flint Result: 26.79x Efficiency Score. Retentics generates $26.79 in attributed revenue for every $1 spent, paying for itself within the first few weeks and continuing to compound from there. The takeaway is straightforward: growth didn’t come from increasing volume, but from improving timing. By automating repeat purchase moments, Sarah Flint built a system that consistently delivers a return with no additional manual work.
In luxury footwear, relying on standard flow triggers for replenishment and repeat orders is a recipe for leaving money on the table. We worked with Sarah Flint to move beyond event-based timers and toward a predictive model that identifies purchase intent before the customer even returns to the store.
By replacing standard flow triggers with Retentics inside Klaviyo, Sarah Flint didn’t just optimize existing automations; they unlocked a system that generates nearly $27 for every $1 spent by reaching customers at the exact moment they’re most likely to buy again.
By targeting forecasted intent rather than static trigger rules, they turned routine replenishment and repeat order flows into a scalable revenue multiplier.
The Efficiency Framework
We didn't look at open rates or clicks. Instead, we looked at the unit economics on how much money our tool makes compared to what it costs.
The Software-to-Sales Multiple: We compared the monthly cost of Retentics against the total revenue it created.
The "Always-On" Revenue: These five AI flows run 24/7. They make sure the brand reaches out exactly when a customer is ready for their next pair.
The Main Metric: 26.79x Revenue Efficiency
The clearest way to measure performance is through revenue efficiency — how much revenue is generated per $1 of software spend.
The Sarah Flint Result: 26.79x
The Impact: For every $1 invested in Retentics, the engine generates $26.79 in attributed revenue. This level of leverage makes it one of the most efficient tools in the brand’s tech stack.
The 12.02% Revenue Contribution: A New Flow Standard
Efficiency is only half the story; the other half is scale. While standard automation handles the basics, the AI-driven Retentics engine has moved from a "supplemental" tool to a core pillar of the Sarah Flint digital strategy.
In a highly optimized Klaviyo setup with dozens of active triggers, these five AI-powered flows now account for 12.02% of total flow revenue.
The Sarah Flint Result: 12.02% Revenue Contribution.
The Impact: By replacing generic timers with predictive intelligence, a small subset of the email library now drives a double-digit share of automated revenue. High-intent timing consistently outperforms high-volume sending.
The AI-Powered Flow Suite
We set up five specific flows in Klaviyo to capture revenue at the right moments:
Replenishment Flow: Reminds customers to reorder exactly when they are likely running out.
Low Inventory Flow: Sends a high-urgency note when a customer’s favorite item is almost out of stock.
First Purchase Bounce Back: Strikes while interest is high to turn a first-time buyer into a repeat customer.
Winback Flow: Reaches out to old customers at the perfect time to bring them back.
Price Drop Flow: Alerts shoppers when a product they liked goes on sale.
Inside the Engine: A Real Look at the "Perfect Round Toe Pump"
This isn't a guess — it’s a direct look at the actual data inside Sarah Flint’s account. While our system tracks hundreds of different buying patterns across the store, this deep dive into the Perfect Round Toe Pump shows how a customer's needs change over time.
One Segment, Multiple Intent Windows: Even within this one group of customers, the "best next move" changes. Our data shows several different peaks in interest, with two main windows driving most of the repeat sales:
The 149-Day Pulse (Style Expansion): When a customer returns quickly (around 5 months), they usually aren't looking for a replacement. Since they already know the shoes fit and feel great, they are most likely to buy a new color (like Cognac) to grow their collection.
The 258-Day Pulse (Core Replenishment): At the 8.5-month mark, the goal shifts to a "Refresh" cycle. After nearly three-quarters of a year of wear, the customer typically returns to re-order a fresh pair of their original, classic black pumps.
This proves that "ready to buy" is always changing. Whether the system triggers a new color or a fresh basic, it recalibrates in real-time to match the actual lifecycle of the customer’s wardrobe.
The Final Result
The Sarah Flint Result: 26.79x Efficiency Score. Retentics generates $26.79 in attributed revenue for every $1 spent, paying for itself within the first few weeks and continuing to compound from there. The takeaway is straightforward: growth didn’t come from increasing volume, but from improving timing. By automating repeat purchase moments, Sarah Flint built a system that consistently delivers a return with no additional manual work.
We've been looking for ways to make our email program more sophisticated, but we needed
a solution that was easy for our team to execute.
David and his team have been great to work with.
We started seeing results almost immediately, and our automated emails are now far more intelligent.
Dave Oliva
E-Commerce growth marketer
Retentics is able to help us improve the lifetime value of our customers and capture under-utilized demand with their AI-driven segmentation.
It changes how we think of segmentation due to the dynamic and personalized nature of AI.
Ron See
Founder
What sets Retentics apart is its sophisticated system predicts exactly when customers will repurchase, which allows marketers to send personalized messages and automate the entire process.
Ruben
Digital Growth Manager
Getting started with Retentics was super easy thanks to their support team. It's amazing how much of our email revenue comes directly from their automated flows!
MacKenzie
Digital Communications & Branding Specialist
Before Retentics, we were mostly guessing when it came to customer timing and product recommendations. Their AI takes the guesswork out of building segments and targeting the right customers at the right moment—something we simply didn’t have the time to do manually. As a small team, having a tool that drives results while giving us back our time is a huge win.
Carlie P.
Co-Founder
AI is an overhyped buzzword that's often thrown around, making it hard to distinguish real innovation from basic machine learning dressed up as something more. With Retentics, setting up flows was effortless - we simply cloned our existing ones, changed the trigger, and were up and running. Most importantly, the impact was almost immediate, and the numbers spoke for themselves: higher click rates and more purchases compared to Klaviyo’s flows.
Javier Gutierrez
Retention Marketing Specialist
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Copyright © 2025 Retentics. All Rights Reserved
Copyright © 2025 Retentics. All Rights Reserved