Who is behind this
A human. Not a ticket system.
In 2026, founder Pascal Fantou personally reads and answers every email — from first contact to your first sends.
Pascal Fantou · Founder · Q4 Reach Labs GmbH, Munich
More about us →You often win new customers through ads or marketplaces. Who makes sure they buy a second time, or a little more right away? We do: we grow your revenue from existing customers, on a commission-only basis, and keep improving it. It happens right after checkout and by email, and you don’t have to do a thing. Commission applies only to the extra orders we demonstrably bring, never to your total revenue.
6 orders we did not bill: the attribution wasn't certain, so we didn't.
You may already have flows, newsletters or a recommendation tool. Once set up, they keep running. Do you know whether they still work well? And do your customers get offered exactly what they’re still missing, at the right moment?
It's all in your Shopify admin; you don't need to send us any of it.
In Shopify you can see how many of your customers have ordered only once so far. Each of them is an open follow-up purchase.
From about that volume, extra carts can see what is frequently bought together in your store. With fewer orders, the app tells you openly that there is not enough data yet.
Then there are product pairs worth recommending. If you mainly sell a single product, or only resellers buy in larger quantities from you, the purchasing patterns we need are not there yet.
Not a problem. Keep what works well; extra carts runs alongside it. We believe our approach does better over time: it compares variants across all connected stores and earns only on extra orders. Whether that holds for your store is your call.
If it doesn't fit yet, we'll tell you openly and explain when it's worth talking again. Not included for now: stores selling electronics or groceries, because margins there are too thin, and stores outside Germany.
You don't buy software you have to set up and keep re-tuning. You hand over a job: your customers should buy from you again without you paying for them again through ads or marketplaces. You don't pay for emails being sent, only for the extra order. That's why we keep improving what we send: it's the only way we both earn more.
A short, plain message, like a quick note from your team: one product, no banners, no countdown. Written by people who have done this for merchants for decades, not by an AI, and checked for language and legal compliance. This is how the emails would look for the store “Example-ABC”:
Proven templates, continuously refined — no builder kit and no mass blasts. The first email goes straight to you, before anything is sent to your customers.
More on the emails →You make €100,000 in revenue, and we demonstrably add €10,000. We charge 6% only on that €10,000, so €600: about 0.55% of your new total revenue.
A new approach deserves an explanation first. There is no commitment, and you decide at every step whether to go on.
You pick a time. The call is free and non-binding, even if you just want to understand how extra carts works, or already use Klaviyo and want to compare. Prefer writing? One email with your store URL is enough; Pascal replies within 48 hours.
Together we go through the four points above. If it fits, you install when you like: right on the call, or in a separate session where you watch your first 30 minutes live. If it doesn't fit yet, we tell you openly why and when it's worth another try.
After a week you get the first results review: what was sent, what it earned, what it would have cost. During the launch phase you pay nothing. You choose between Free and Fair yourself; there is no automatic upgrade.
We take care of our customers the way we take care of yours: personally. That is why we guide every new store ourselves, from installation to the first results review. The first call is non-binding: have the approach explained, then decide for yourself. No newsletter, and we never pass your address on.
try it free · no subscription · uninstall anytime