Almost everything on this page points off our site: a peer-reviewed paper, podcast episodes, expert profiles, review platforms and our legal details. Click through and make up your own mind.
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DRIP is a team of 70+ strategists, psychologists, analysts, designers, developers and QA. These are the two names you'll find on the paper, the podcasts and the profiles below.
Fabian leads DRIP's experimentation data infrastructure and statistical product layer. He has helped build the analytics, reporting and decision systems behind €500M+ in additional revenue across 250+ brands, and he co-authored DRIP's peer-reviewed field study in Marketing Letters.
Samuel sits on DRIP's board. His subject is behavioural science in e-commerce: how buyer psychology turns into hypotheses you can actually test. He co-authored the Marketing Letters field study and has talked about testing on CRO.CAFE, HubSpot's Listen & Grow and OMR Education.
Peer-reviewed research
In 2024, Marketing Letters, a Springer journal, published a field study on price framing co-authored by Fabian Gmeindl and Samuel Hess. It re-tests a known price-framing effect outside the lab, with real buyers.
Peer review means independent researchers checked the method before it went to print. It's the same standard we hold our A/B tests to: the statistics are fixed before a test starts, and nobody peeks early.
R&D certified by the BSFZGermany's research certification office, 2026 sealKöcher, Husemann-Kopetzky, Schirmbeck, Hess, Gmeindl & Hess (2024). A conceptual replication of the differential price framing effect in the field. Marketing Letters, 35(1), 159-170. DOI 10.1007/s11002-023-09690-7
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Book a call with the team and tell us about your shop. We'll talk through where it stands, where you want it to go, and how we'd get you there. If working with us isn't the best return on your money, we'd tell you rather than take it.
30 minutes, and you'll know exactly where your shop stands.
The guarantee, in full
When you can predict what is likely to win, you can promise the outcome. What counts as uplift, how it's measured, and what happens if we miss is written down in plain language.
We can promise it because we know our numbers: more than 50% of our A/B tests win, across 4,000+ documented experiments. That's when a guarantee stops being marketing and becomes underwriting.