Nellie.
Methodology Calculator

Results, with the method attached.

No logo walls here. Every case on this page shows lift measured against a holdout group, over a stated period, for a named vertical – and links to the arithmetic that produced it. If we cannot show you the method, we do not publish the number.

Status

Nothing published yet – on purpose.

We are onboarding our founding stores now. A holdout needs enough shoppers through it before the gap between groups means anything, so the first cases publish from store #3, once their results clear that bar. Until then this page stays empty rather than filled with something we cannot defend.

Read the method first

What a published case will contain

So you can judge the format before there is anything in it. This is the template, filled with placeholder values – not a customer.

Specimen · not a customer
The store
VerticalWomenswear
CountryLithuania
Period12 weeks
Holdout10% of eligible shoppers
The result
Treated€x.xx per shopper
Holdout€x.xx per shopper
Lift+xx%
Net recovered€xx,xxx after refunds
Plus
One or two real thread excerpts, anonymised with the shopper's permission A quote from the merchant, attributed to a named person at a named shop A link to the exact holdout arithmetic behind the lift figure What did not work, where there was something worth reporting

We would rather publish a small honest number late than a big borrowed one today. If a case ever appears here without a method link, hold it against us.

Methodology Calculator About Got a text? Terms Privacy
© 2026 Nellie.