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Best European Square Alternatives (2026)

🇺🇸US Company

by Block Inc. · Founded 2009

Payment processing and business management platform offering POS systems, invoicing, payroll, and banking services for small businesses.

freemium💳Payment & Fintech

Best Square Alternatives

4 European alternatives

Curated by Sidney, Founder of BuiltInEu · Updated

Quick answer: 4 European alternatives to Square are listed, from 3 countries. 2 have a free plan. Top picks: SumUp, Flatpay and Adyen.

European alternatives to Square compared by country, pricing, free plan, open source, self-hosting and migration difficulty
#ProductCountryFromPricingFree planOpen sourceSelf-host
1SumUp🇬🇧United KingdomNot verifiedPay per transactionYesNoNo
2Flatpay🇩🇰DenmarkNot verifiedPaidNot verifiedNoNo
3Adyen🇳🇱NetherlandsNot verifiedFreemiumNoNoNo
4Mollie🇳🇱Netherlands€20 per monthPay per transactionYesNoNo

A dash means we have not verified that attribute. Migration difficulty is shown only where the editor tested the switch.

SumUp logo

SumUp

🇬🇧

by SumUp Limited

SumUp is a European mobile payment processing company headquartered in London, UK (founded 2012). It enables small businesses to accept card payments via portable card readers and a smartphone app. SumUp operates across 36 markets in Europe, the Americas, and globally. The platform includes card readers, mobile POS, online payments, invoicing, and a business account — all with no monthly fees on the standard plan. Merchants pay only per transaction (1.69% for in-person payments in Europe).

Free plan
pay per transaction
View Details
Visit SumUp
Flatpay logo

Flatpay

🇩🇰

by Flatpay

Flatpay provides businesses with streamlined payment solutions and a powerful point of sale system, allowing merchants to easily accept payments anytime, anywhere, with no hidden fees.

paid
View Details
Visit Flatpay
Adyen logo

Adyen

🇳🇱

by Adyen N.V.

Dutch payment platform providing end-to-end infrastructure for accepting payments anywhere in the world.

freemium
View Details
Visit Adyen
Mollie logo

Mollie

🇳🇱

by Mollie B.V.

Mollie is a payment service provider that facilitates online transactions for businesses. It supports various payment methods, including credit cards and digital wallets, to help streamline the checkout process. The platform offers easy integration with websites and provides tools for managing payments and analytics.

Free plan
pay per transaction
View Details
Visit Mollie

Why switch from Square?

US CLOUD Act

US authorities can access your data stored by US companies, even if stored in Europe.

Privacy Concerns

US companies may collect and use your data in ways not compliant with EU standards.

EU Alternatives

European providers are listed by headquarters. Verify privacy, hosting, security, and legal requirements for your use case.

Frequently Asked Questions

Are there European alternatives to Square?
Yes, there are European alternatives to Square. Headquarters, hosting, encryption, and compliance are separate facts, so compare features and verify each provider's current privacy, security, and hosting documentation.
Why switch from Square to a European alternative?
A European provider can support procurement or data-sovereignty goals, but it does not automatically guarantee European hosting, encryption, GDPR compliance, or immunity from foreign law. Verify the provider's policies and seek legal advice where required.
Is Square GDPR compliant?
As a US-based company, Square may transfer and process your data in the United States. While they may have GDPR compliance measures, your data could still be subject to US laws including the CLOUD Act.
How do I migrate from Square to a European alternative?
Start by exporting your data from Square. Import options differ by product, so check what each alternative documents before you commit. This page shows migration difficulty only where the switch has been tested.

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Ready to switch to a privacy-focused alternative?

Protect your data by moving to an EU-based service. Our migration guides make switching easy.

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