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See if your shop is a fit
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Free ROI calculator

What is 10% more revenue worth to your shop?

Put in your monthly revenue and what testing costs you. The calculator puts six months of extra revenue next to the cost and shows when it pays back. The 10% isn't picked at random: it's the floor of our guarantee.

Run the numbersSee if your shop is a fit
A/B testing ROI calculator
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A/B test statistics toolkit

Check whether a result is real, plan how long a test needs, and see what parallel testing does to your pace.

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Data

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Conversion rates, cart abandonment, device splits and test win rates from 117 European brands.

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Best A/B testing tools

Eight testing tools ranked on what matters for online shops, with every weight and source published.

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DRIP and Apex

The math is the easy part.
Knowing what to test isn't.

Book a call and bring the numbers you just worked out. We'll look at where your shop stands and what testing could realistically add. If it doesn't add up for you, we'll tell you.

See if your shop is a fit

A free 30-minute call with the team. That's it.

The guarantee, in full

At least 10% more revenue in under six months, or month seven onward is free.

When you can predict what wins, 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.

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

See if your shop is a fit

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A/B testing ROI calculator
Minimal ROI multiple
0.0x

Enter your monthly revenue to see the return.

Monthly lift€0
Six-month lift€0
Chart paybackAfter M12

Your inputs.

5 inputs
€0
€
%
5%10% floor15% max
€0
€

One-time strategy and research setup.

€0
€

Multiplied by 6 months in the ROI window.

ROI calc, revenue6-month value window
Enter a monthly revenue above zero to calculate your ROI.

The next step

For your team, your board, your shareholders.

This calculation is yours to share. The assumptions are explicit, the cost is fixed, and the graph explains timing separately from the ROI multiple.

Your calculation

Monthly revenue
€0
Uplift assumed
0%
Profit basis
revenue
6-month lift
€0
Service cost
€0
Minimal ROI
0.0x

Assumptions,
in plain English.

Conservative on purpose. It's the same math we use across 4,000+ documented A/B tests.

Uplift

The default is 10% because that's the floor of our guarantee: at least 10% more revenue in under six months, or month seven onward is free.

Math

Monthly revenue x uplift x CM = additional monthly. Multiplied by 6 for the 6-month figure. No ramp curve smoothing.

Gewinner bleiben

Wins are persistent. Once shipped, the uplift recurs every month the change stays in production. Year 2 is pure profit with no further service cost.

Deckungsbeitrag

When the toggle is on, you enter your own CM%. We do not assume one for you; your CFO knows the real number.

Service cost

The cost shown is your input. Enter whatever the engagement is priced at; that number is the ROI denominator.

What's excluded

No extra traffic growth, CAC improvement, or AOV expansion outside the test. Boringly conservative.