4 Best European Square Alternatives in 2026
Sovereignty-first software picks, all built in Europe — hand-picked to replace Square.
By the EU Alternatives team Last updated
Our top pick this year is Adyen — but every option on this list is European-owned, GDPR-native, and production-ready. Worth a closer look: Mollie, Payplug, Choice.
Square alternatives are mainly CRM & Marketing. Browse any of those categories for a wider shortlist beyond this list.
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One platform for payments, data, and financial products — 150+ currencies, 200+ payment methods, built to scale globally.
Adyen is a global payments platform built for enterprises that need unified payment acceptance, data intelligence, and embedded financial products under one roof. Processing over €1.4 trillion annually with 99.999% uptime, it connects merchants to every payment method and market through a single integration.
The platform unifies in-store, online, and mobile payments with card issuing, payout capabilities, and risk management in a single API. 150+ currencies and 200+ local payment methods are available natively — no third-party aggregators needed — making Adyen the infrastructure layer for the world's leading businesses.
Key benefits:
- Unified payment platform covering online, in-store, and mobile in one integration
- 200+ local payment methods including cards, digital wallets, and bank transfers
- Card issuing for embedded financial products under your own brand
- Fraud and risk management with real-time scoring and authentication tools
- Data and analytics for cross-channel payment performance insights
- Global settlements across 150+ currencies with automated reconciliation
Adyen is headquartered in Amsterdam, Netherlands, founded in 2006, and holds EU, UK, and US banking licences. Listed on Euronext Amsterdam and subject to Dutch and EU financial regulation, it processes payments from European data centres with full GDPR compliance.
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Online and in-person payments for European SMEs — iDEAL, SEPA, cards, and recurring billing through one clean API.
Mollie is a European payment service provider making it straightforward for businesses of every size to accept payments online and in person. It consolidates cards, SEPA transfers, iDEAL, PayPal, and dozens of local European methods behind a single clean API — with transparent per-transaction pricing and no hidden fees.
Beyond standard checkout, Mollie supports subscription and recurring billing, payment links, embeddable invoicing, and Tap to Pay on iPhone. Over 250,000 businesses use Mollie's unified dashboard to manage transactions, reconcile accounting, and access embedded financing through Mollie Capital.
Key benefits:
- 30+ payment methods including iDEAL, SEPA, Bancontact, and international cards
- Recurring billing for subscriptions and usage-based charging
- Payment links and invoicing for quick, no-checkout payment collection
- Fraud prevention with acceptance optimisation built in
- Embedded financing through Mollie Capital for eligible merchants
- Unified dashboard for transactions, insights, and accounting reconciliation
Mollie is headquartered in Amsterdam, Netherlands, founded in 2004, and regulated as a licensed Payment Institution under Dutch and EU financial law. It operates under GDPR and stores data within EU infrastructure, giving European merchants full compliance without extra configuration.
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French payment gateway with native Cartes Bancaires support — 92.5% acceptance rate, frictionless 3DS, omnichannel dashboard.
Payplug is a French payment gateway trusted by 18,000+ merchants for online and in-store payment acceptance across France and Europe. With native connectivity to Cartes Bancaires through parent company Groupe BPCE, it delivers 92.5% average net acceptance rates that international processors struggle to match on French card schemes.
The platform processes over €10.9 billion annually and provides a unified Cockpit dashboard for managing financial flows, fraud prevention, and omnichannel commerce. Its 3D Secure 2 implementation achieves 83% frictionless authentication across issuers — reducing cart abandonment while maintaining PSD2 compliance.
Key benefits:
- Cartes Bancaires native support via Groupe BPCE for superior French card acceptance
- 92.5% net acceptance rate across the merchant base
- Unified Cockpit dashboard centralising online and in-store financial flows
- Frictionless 3DS2 achieving 83% passwordless authentication
- Fraud prevention with adaptive scoring and chargeback management
- Omnichannel integration across e-commerce, in-store, and mobile channels
Payplug is headquartered in Paris, France, and is a subsidiary of Groupe BPCE, one of France's two largest banking groups. All payment data is processed under French and EU financial regulation with GDPR-compliant infrastructure and dedicated French customer support.
