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Long-form guide

The Ultimate Conversion Psychology Playbook (2026)

The Conversion Psychology Playbook for e-commerce managers ↓ Understand what drives your customers’ decisions (and turn those insights into tests.) Here’s what’s inside:

General CRO
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The Ultimate Conversion Psychology Playbook (2026)

What's inside

What you get

1/ The Big Five explained

Understand the five personality dimensions and how they can inform your messaging.

2/ Beyond demographics

Two shoppers can share the same age and location but buy for very different reasons.

3/ Customer research

Learn how to collect insights into your buyers’ motivations, doubts, and expectations.

4/ Message testing

Turn those insights into hypotheses for your copy, visuals, and calls to action.

5/ The survey toolkit

Ready-to-use questions covering purchase triggers, objections, and shopping friction.

Research gives you ideas for what to test.

The next question is which ones to build first.

We built one of the largest A/B test databases in e-commerce: 4.3 million tests from 151,000 shops, since 2011.

On top of it we built our own testing tool, Apex.

Apex tells you which test wins before you build it, and runs your whole testing program in one place.

Use the playbook to understand your buyers and build better test hypotheses.

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The CRO agency behind 250+ of the world's leading online businesses

Whether high-growth startups or global leaders in e-commerce, travel, insurance, or retail, we consistently drive measurable revenue increases.

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Tourlane
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Livefresh
Blackroll
The Female Company
Ryzon
1 Kom Ma 5
Kickz
Horizn Studios
Seeberger
Luca Faloni
Priwatt
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Snocks
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NKM
Oceansapart
Omhu
Send a Friend
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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.

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30 minutes, and you'll know exactly where your shop stands.

The Newsletter Read by Employees from Brands like

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Join 17,000+ Ecom founders turning CRO insights into revenue

Trusted by 250+ brands

  • Strauss
  • Koro
  • Sunday Natural
  • The Body Shop
  • Grover
  • Hello Fresh
  • Natural Elements
  • AG1
  • Bluebrixx
  • Woom
  • Hornbach
  • Tourlane
  • Congstar
  • Holy
  • Junglück
  • PV
  • Wunschgutschein
  • Motel A Mino
  • Ryzon
  • Kickz
  • The Female Company
  • Livefresh
  • Schiesser
  • Horizn Studios
  • Seeberger
  • Luca Faloni
  • Zahnheld
  • Snocks
  • Bruna
  • NatureHeart
  • Priwatt
  • Jumbo
  • NKM
  • Oceansapart
  • Omhu
  • Blackroll
  • 1 Kom Ma 5
  • Purelei
  • Giesswein
  • T1tan
  • Buah
  • Ironmaxx
  • Waterdrop
  • Send a Friend
  • Fitjeans
  • Mofakult
  • Plantura
  • BGA
  • Coop
DRIP / Apex

Prediction-based experimentation for online shops from €100k a month.

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