Definition
Stripe, Adyen, Mollie and Worldline are four global leaders among acquiring PSPs: they accept payments on behalf of merchants (cards, wallets, alternative methods) and pay them the funds.
Together they process several trillion euros a year and embody the different models of the modern acquiring PSP:
| Player | Country | Founded | Model | Segment |
|---|---|---|---|---|
| Stripe | US | 2010 | Cloud-native, dev-first | Tech / SMB → enterprise |
| Adyen | NL | 2006 | Unified commerce | Enterprise (Spotify, Uber) |
| Mollie | NL | 2004 | Modern API | EU SMB |
| Worldline | FR | 1972 (Atos spin-off 2014) | Incumbent, broad | Acquiring + processing |
Stripe
Founded in 2010 by Patrick and John Collison in San Francisco, a pioneer of the modern payment API. Valued at up to $95B in 2021, then $65B (2024) and $91.5B (2025), with $1.4T in TPV in 2024 (+38%).
Beyond acquiring (Stripe Payments), it offers a complete financial stack: Connect (marketplaces), Billing (subscriptions), Capital (advances), Issuing (card issuing), Treasury (BaaS), Tax, Identity and Atlas. Its differentiator: reference-grade developer documentation, a modern API (idempotency, robust webhooks) and a very broad scope. Pricing: 2.9% + €0.30 on domestic EU cards, customised for high volumes.
Adyen
Founded in Amsterdam in 2006 by Pieter van der Does and Arnout Schuijff, listed in 2018 (a market cap of ~€40–55B in 2024–2025). Its hallmark is unified commerce: online, in-store (POS) and mobile on a single platform, with unified cross-channel data. A vertically integrated acquirer and processor, present in 30+ countries.
Enterprise-focused (Spotify, Netflix, Uber, eBay, Microsoft, McDonald's, H&M), it uses non-public interchange++ pricing (real interchange + scheme fees + markup), transparent and economical for very high volumes. Headcount ~4,300.
Mollie
Founded in the Netherlands in 2004 by Adriaan Mol, it became a European pure player; an $800M Series C in 2021 (Blackstone) at $6.5B, then a refocus on profitability. EU SMB-focused: quick sign-up, accessible pricing, very well-integrated local methods (iDEAL, Bancontact, Sofort, Klarna, Wero).
Pricing: 2.8% + €0.25 on EU cards, iDEAL at a flat €0.29 (very competitive on small NL baskets), SEPA at €0.25. ~200,000 merchants, official integration with Mailchimp, Sage and WooCommerce. Headcount ~850.
Worldline
Originating from Atos (active since 1972), spun off as Worldline in 2014, it became the European payment leader after acquiring Ingenico (~€7.8B, completed in October 2020). Very broad EU coverage (10+ billion transactions a year, more than €400B processed), with a strong presence in the in-person space (Ingenico terminals) and bank outsourcing.
Worldline went through a major crisis in 2023 (loss of high-risk clients after tightening compliance, a profit warning, a share price divided by 4–5), followed by a restructuring and a refocus on acquiring in 2024–2025. Headcount ~18,000.
Summary comparison
| Aspect | Stripe | Adyen | Mollie | Worldline |
|---|---|---|---|---|
| Segment | SMB → enterprise | Enterprise | EU SMB | Banks + enterprise |
| Model | Cloud-native | Unified commerce | Modern API | Incumbent + Ingenico |
| Geography | Global | Global | EU | EU |
| Pricing | 2.9% | Interchange++ | 2.8% | Variable |
| Volume/year | > $1.4T (2024) | Hundreds of €B | Tens of €B | Hundreds of €B |
| Headcount | Several thousand | ~4,300 | ~850 | ~18,000 |
| Strength | Dev experience | Unified commerce | EU SMB, simplicity | Volume + coverage |
2024–2025 trends
- Embedded finance: Stripe (Treasury, Capital, Issuing), Adyen (For Platforms) and Mollie (Capital) are launching BaaS-like services, competing with Treezor, Swan and Solaris.
- Pay by Bank / A2A: all of them integrate Pay by Bank (Bridge, Tink, TrueLayer) alongside cards, under the expected pressure on margins.
- AI / fraud: Stripe Radar, Adyen RevenueProtect and Mollie Riskfeed make ML a key differentiator.
- Consolidation: a mature market, with slowing growth outside Adyen and Stripe; Worldline illustrates the risk of heavy key-account exposure.
What these PSPs are not
- Not banks: as EMIs or payment institutions, they do not hold long-term accounts.
- Not card schemes: they are acquirers, not Visa/MC/CB.
- Not equal in coverage: Mollie is EU-only, Worldline is EU with a little global reach, while Stripe and Adyen are more global.
- Not competitors on every account: SMB (Mollie) vs enterprise (Adyen).
Within the PSD2 / Open Finance ecosystem
Acquiring PSPs are central: card acquiring remains their core business, all of them adapt 3DS2 and manage SCA exemptions, gradually integrate PIS / Pay by Bank and SCT Inst (VoP, IPR), and use Open Banking to score their embedded-finance offers (Stripe Capital, Adyen Capital, Mollie Capital).
Real-world examples
- Stripe: the subscriptions of OpenAI, Anthropic and many SaaS firms, managed via Stripe Billing.
- Adyen + Spotify: a switch to Adyen to unify online and retail (in-store gift cards).
- Mollie + Sage: native integration for FR/UK/NL SMBs.
- Worldline + Carrefour, Decathlon: card acquiring for large French merchants.
- Stripe Tax: automation of EU VAT (and US sales tax), an SMB differentiator.
- Merchant advances: Adyen Capital and Stripe Capital compete directly with B2B BNPL (Defacto, Karmen).
- Stripe Issuing: virtual card issuing used by Brex (US) or Spendesk (FR).
- Worldline crisis: an example of the risk of concentration on high-risk clients, and the need for strong compliance.
- Apple Pay: Apple charges ~0.15% in interchange, which every PSP must negotiate.
- Wero / EPI: if merchant Wero takes off, the erosion of card volumes will push all these PSPs to integrate it as a method.