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Trusted by founders and leaders

What clients say

"Sander has deep knowledge of conversion optimization, but what really makes him valuable is that he thinks strategically alongside you. He comes with ideas, establishes a testing culture where the whole team participates, and always decides based on data.

He works in short iterations, can set up a lot independently, and stays practical. For us as a small business, he's an ideal partner. One point of contact, clear communication, and someone who gets things done. A reliable person you can build and grow with."

Job Verberne
Job Verberne Founder at ZZP Daily

"It was a pleasure working with Sander on various CRO/CXO improvements for the Boodschappen.nl website.

Sander is knowledgeable, creative, works independently, and takes all the work off your plate when it comes to thinking, building, executing, and analyzing various tests. He's able to build both small and complex changes.

Sander not only uses all available data sources but also takes a broader approach by incorporating the entire market and competitive landscape into his strategy.

He's flexible, always seeks collaboration, and communicates clearly. Highly recommended for all your CXO & CRO needs!"

Brechtje de Leij
Brechtje de Leij Digital Product Owner at BNR

"Sander is a rare find in the eCommerce CRO space, a secret tip one might say. I've worked with Sander in various optimization projects where he led project management, conversion audits and built A/B-tests for us.

It is always a pleasure working with him, not just because results regularly exceed expectations, but because he's also just fun to be around and always a great addition to the teams he is working with."

Nils Koppelmann
Nils Koppelmann Founder at 3tech

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