The MoatNarrow moat

Adyen is the payments platform the world's largest companies run their money through, and after a run of thin, loss-making AI-infrastructure stories it is a welcome example of the opposite: a genuinely high-quality, deeply profitable business with a real and durable moat. Where most of the payments industry is a tangle of legacy systems bolted together over decades, Adyen built one thing — a single, full-stack, in-house platform that handles the entire flow of a payment, from the moment a customer taps a card or clicks 'buy' through risk, authorization, acquiring, and settlement — and it built it to work identically across online, in-store, and in-app, and across the world. That single platform, sold to enterprises like Meta, Uber, Microsoft, Spotify, and McDonald's, is the source of a moat built on technology, switching costs, data, scale, and, unusually for fintech, real profitability. The honest rating is narrow rather than wide — payments is fiercely competitive and the moat is genuinely contested — but this is a real moat protecting a real, cash-generative franchise.

The deepest edge is the platform itself. Adyen designed and wrote its system from scratch as one integrated stack, with no acquired legacy to maintain — a sharp contrast to incumbents like Fiserv or Global Payments, who assembled their businesses through acquisitions and run a patchwork of incompatible systems. Owning the whole stack, end to end, lets Adyen move faster, offer capabilities rivals cannot easily match, and give a global merchant a single, consistent integration instead of a dozen regional ones. This is genuine engineering advantage, and it is the hardest part of the moat to replicate — though not impossible, as Stripe's years-long build-out shows.

On top of it sit enterprise switching costs and the land-and-expand dynamic they enable. A large enterprise that integrates Adyen across its checkout, its stores, its app, and its geographies embeds the platform deep in its operations, and moving away is costly, risky, and disruptive — so customers stay, and, crucially, they grow: Adyen's net revenue retention has consistently run above 100%, meaning existing customers spend more each year as they add channels, regions, and volume. The bulk of Adyen's growth comes not from winning new logos but from expanding within the ones it already has, the hallmark of a sticky platform.

Then there is data, scale, and performance. Every payment across Adyen's global network feeds a single dataset that lets it optimize authorization rates (getting more legitimate transactions approved, which directly makes merchants money), fight fraud, and route payments intelligently — advantages that compound with scale. And the scale itself, running enormous volume through one efficient platform, produces the fourth source: profitability. Adyen is that rarest of things, a fintech that makes serious money — EBITDA margins above 50%¹, net margins around 45%, all self-funded, with a disciplined, founder-shaped culture that has kept it profitable and cash-generative throughout its growth.

The results reflect the quality: net revenue grew 21% in 2025 to €2.36 billion, EBITDA margin reached 53%² (recovering from a 2023 dip), net income passed a billion euros, and the company processed €1.4 trillion of payments. Management guides to 21–23% growth continuing and margins rising above 55% by 2028³. These are the numbers of a genuine compounder.

But the rating is narrow, and the reasons matter. Payments is intensely competitive, and Adyen faces a formidable rival in Stripe — which has rebuilt much of Adyen's full-stack advantage⁶ — plus PayPal's Braintree, the scaled incumbents, and the ever-present threat that the very largest merchants insource their payments rather than pay anyone. Take rates drift structurally lower as large, low-margin volume grows, so Adyen must keep winning volume fast just to grow net revenue. And the market has already learned the moat is contested: in 2023, a single quarter of slowing North American growth and margin investment sent the stock down roughly 40% in a day — a vivid reminder⁴ that the valuation depends on sustained high growth that competition can interrupt. Even after de-rating from a nosebleed ~150 times earnings in 2021 to around 25 times today⁵, Adyen is priced as a compounder that must keep compounding. An investor in Adyen owns one of the best businesses in payments — a profitable, sticky, well-run, single-platform franchise — with a real but narrow moat in a competitive market, at a price that has come back to earth but still asks the growth to continue. The number that answers whether it can is net revenue retention: while existing merchants keep spending over 100% of last year's total, the land-and-expand engine is intact and the 20%+ growth the price needs takes care of itself; the year retention slips toward par, the compounder has become a mature toll booth priced as a grower.