How Zwarte Roes recovered abandoned cart revenue with Klaviyo and TrackBee.
A specialty coffee roaster ran two abandoned cart flows side by side, one on Klaviyo's native tracking and one on TrackBee. Within 30 days the TrackBee flow recovered revenue that would otherwise have been left on the table.
A big email marketing opportunity sitting untapped.
Marvin, one of the owners of Zwarte Roes, had used TrackBee since June 2024 to improve their Meta and Google Ads tracking. It had quickly proven its value on the advertising side.
"We weren't really searching for a solution. We were approached by TrackBee. I found it interesting because we're always trying to improve our performance on Meta and Google."
Marvin
Co-founder · Zwarte Roes
In early 2025, Zwarte Roes set a goal to improve their email marketing as part of their wider strategy. At that point their Klaviyo setup only ran checkout abandonment flows. They were not yet using abandoned cart flows, which meant they were missing a chance to re-engage shoppers earlier in the buying journey.
The standard Klaviyo tracking pixel also missed events, so even the flows they did run were not firing as often as they could. Apple device cookies expiring after seven days, shoppers using multiple browsers, and adblockers all left gaps in the data.
What we did
Two abandoned cart flows, run side by side.
In February 2025, TrackBee released its Klaviyo integration. It captures conversion events server-side and enriches them with first-party data, tracking more abandoned cart events than Klaviyo does on its own. That means flows trigger more often and recover more revenue.
The timing matched Zwarte Roes' email goals. Since they already had checkout abandonment flows live, they built two new abandoned cart flows: one on Klaviyo's native implementation, and one on TrackBee. Running both at once let them compare performance directly and measure TrackBee's real impact.
The TrackBee flow was set up to capture the abandoned cart events Klaviyo's standard pixel misses, the events lost to expiring Apple cookies, multiple browsers, and adblockers. There was no Shopify theme code for Zwarte Roes to maintain.
Results
More events tracked, more flows triggered, more revenue recovered.
Within just 30 days, the difference between the two setups was clear across every step of the funnel.
Klaviyo · revenue
+194%
The TrackBee flow recovered 194% more abandoned cart revenue than Klaviyo's native flow alone, sales that would otherwise have been lost.
Klaviyo · events
+445%
Server-side tracking captured more than four times as many abandoned cart events as Klaviyo's standard pixel on zwarteroes.nl.
Klaviyo · flow triggers
+306%
With more events captured, the abandoned cart flow fired three times more often, reaching far more shoppers at a key decision point.
Abandoned cart events
Triggered flows
Generated cart revenue
More events captured means more chances to recover
TrackBee tracked 445% more abandoned cart events than Klaviyo alone. For a specialty coffee brand, each of those events is a shopper who showed genuine interest. Hundreds of interactions that were previously invisible suddenly became actionable.
More flows triggered means more reach
Because TrackBee captured so many more events, the abandoned cart flow in Klaviyo fired 306% more often than it would have on its own. Reaching more shoppers at the moment they leave is what drives recovered revenue.
The compounding effect
The 194% revenue lift came directly from those two effects working together. And because TrackBee's insights inspired Zwarte Roes to build abandoned cart flows they didn't have before, they effectively generated 293.5% more revenue than they would have running no abandoned cart flows at all.
"It's not that we suddenly have double the overall revenue, but it's absolutely money that would otherwise be left on the table. As traffic grows and marketing budgets increase, having all these things set up properly becomes really interesting."
Marvin
Co-founder · Zwarte Roes
Next, Marvin aims to double Zwarte Roes' revenue in the coming year. With TrackBee as a tracking foundation in place, their marketing will only get more efficient over time.
"It's absolutely money that would otherwise be left on the table. And it's a good foundation, because you keep improving every month and year."
Marvin
Co-founder at Zwarte Roes
Free for 30 days
Want to recover the revenue Klaviyo misses?
Install TrackBee in five minutes and connect Klaviyo. Run a TrackBee abandoned cart flow next to your current setup and compare the numbers yourself.
Results measured during the first 30 days of Zwarte Roes running a TrackBee abandoned cart flow alongside a Klaviyo native abandoned cart flow. Event, trigger, and revenue lifts compare the TrackBee flow against the Klaviyo native flow over the same window.
Klaviyo · 30-day comparison
