⚠ Large Merchants Multi-Source DeliberatelyModerate threat

The sophisticated giants Adyen targets deliberately avoid depending on any single payments provider, and this multi-sourcing caps the switching-cost moat. The largest merchants — exactly Adyen's customer base — understand that payments is mission-critical and that dependence on one vendor is dangerous, so they routinely integrate two, three, or more providers and split their volume among them. This preserves their leverage (they can shift volume to negotiate better pricing), their resilience (if one provider fails, others carry the load), and their freedom (they are never locked in). For Adyen, it means that even a deeply-integrated, long-standing enterprise customer is rarely a customer it owns outright — it is a customer whose volume it must continually compete to win and keep against the other providers already integrated alongside it.

Multi-sourcing turns the switching-cost moat from a lock into a continual contest for share. Because the rival providers are already integrated, the friction of shifting volume among them is far lower than the friction of a full rip-and-replace — a merchant unhappy with Adyen's pricing or performance can simply route more volume to a competitor it already uses, without a wholesale switch. This gives the powerful customers real, ongoing leverage over pricing and terms, and it means Adyen must keep earning its share of each account through performance and price rather than resting on integration. Deep integration still matters — it makes Adyen hard to remove entirely and positions it to win the largest share — and Adyen often does win the majority of a sophisticated merchant's volume through superior capability. But an investor should recognize that the switching costs, real as they are, are softened by the deliberate multi-sourcing of the very customers Adyen depends on, who hold the leverage of always having an alternative already plugged in — a structural check on the moat that keeps it narrow and keeps Adyen competing, account by account, for volume it can never fully take for granted — as the 2023 volume shifts demonstrated¹.