Adyen becomes Flatpay's infrastructure: the door-to-door seller gets a heavyweight backbone
Adyen and Flatpay announced a strategic partnership on 23 September 2026: Adyen provides acquiring and the platform for Flatpay's more than 100,000 small merchants in seven countries, Germany among them. Flatpay keeps the customer relationship, while Adyen opens up financial products such as instant settlement, merchant cash advances and business accounts.
What happened
Adyen and the Danish payments company Flatpay announced a strategic partnership on 23 September 2026. According to Adyen's release, Adyen provides the payments platform and local acquiring for Flatpay in seven markets: Denmark, Germany, Finland, the UK, France, the Netherlands and Italy. Flatpay says it serves more than 100,000 small and medium-sized businesses and keeps the personal, local customer relationship. Flatpay can also integrate Adyen's embedded finance suite; the release names instant settlement, merchant financing, business accounts and card issuing. It gives no timeline and no terms. We last analysed Flatpay's growth and loss figures on 28 August.
Who is affected
Small retailers, hairdressers, bakers and restaurateurs who already use a Flatpay terminal or are currently being approached by its field sales force. And every competitor in the small-merchant segment, from SumUp to the savings-bank and cooperative-bank offers, because a flat-rate provider that relies squarely on field sales now has one of Europe's biggest acquirers behind it.
Analysis
This is the most honest division of labour our industry knows: the salesperson at the front, the machine at the back. Flatpay has shown that merchants reward a personal visit, and it pays for that with heavy losses. Adyen has the technology but no rep ringing the baker's bell at seven in the morning. Together that makes a model that can scale, provided the margin beneath the flat rate holds up.
For the merchant little changes at first, but two questions are worth asking. First: who will be my contractual partner for settlement, and does anything change in the payout rhythm or in liability for chargebacks? The release is silent on this. Second: instant settlement and merchant cash advances sound good, but they tie you more closely to one provider. Anyone who pre-finances their turnover through their terminal provider will find it harder to switch later.
What to do now
- Flatpay customers should ask in writing whether the switch changes their contractual partner, payout dates or terms and conditions, and keep the answer.
- Assess offers for instant settlement or cash advances only on total cost and term, not on the monthly instalment.
- When comparing, put the flat rate next to the itemised fees: with a high share of girocard payments, a flat rate is rarely the cheapest option.