Adyen powers Flatpay: the door-to-door seller gets a heavyweight backbone

What happened

Adyen and the Danish payments company Flatpay announced a strategic partnership on 23 September 2026. According to Adyen’s press release, Adyen will provide the payments platform and local acquiring for Flatpay in seven markets. These are Denmark, Germany, Finland, the UK, France, the Netherlands and Italy.

Flatpay says it serves more than 100,000 small and medium-sized businesses. It 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 losses on 28 August.

Who is affected

Small retailers, hairdressers, bakers and restaurant owners who already use a Flatpay terminal or are being approached by its field sales force. And every competitor in the small-merchant segment, from SumUp to the offers from savings banks and cooperative banks. A flat-rate provider built squarely on field sales now has one of Europe’s biggest acquirers behind it.

Assessment

This is the most honest division of labour in our industry: the salesperson at the front, the machine at the back. Flatpay has shown that merchants reward a personal visit. 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 they have a model that can scale, provided the margin under the flat rate holds.

Little changes for the merchant at first. But two questions are worth asking.

First: who will be my contractual partner for settlement? Will the payout rhythm or the liability for chargebacks change? The release says nothing about this.

Second: instant settlement and merchant cash advances sound good, but they tie you more closely to one provider. If you pre-finance your takings through your terminal provider, switching later becomes harder.

What to do now

1. Flatpay customers should ask in writing whether the change affects their contractual partner, payout dates or terms and conditions. Keep the answer.
2. Judge offers for instant settlement or cash advances on total cost and term only, not on the monthly instalment.
3. When comparing, put the flat rate next to itemised fees. If a high share of your payments is girocard (Germany’s domestic debit card), a flat rate is rarely the cheapest option.