Explore the Best European Payment Processors in 2026

Europe’s payment landscape in 2026 is defined by PSD3 compliance, the dominance of SEPA Instant, and the rise of Wero. Here are the best payment platforms to optimize your checkout conversion.

Alok Vats

Product

12 min read

Jul 9, 2026

---

Europe’s payment market in 2026 is shaped by SEPA Instant, Strong Customer Authentication, local bank payment methods, and the expanding rollout of Wero.

Cards remain important, but European businesses cannot depend on cards alone. Payment methods such as iDEAL in the Netherlands, Bancontact in Belgium, Bizum in Spain, BLIK in Poland, and SEPA payments are important for improving checkout conversion in local markets.

European businesses must also prepare for changes under PSD3 and the Payment Services Regulation. These changes aim to strengthen fraud protection, consumer rights, payment security, and competition across the European payment market.

AI, SaaS, and digital product companies face another challenge. In addition to accepting payments, they must manage subscriptions, usage-based billing, customer access, VAT, invoices, refunds, and tax compliance across different countries.

This guide compares the leading European payment gateways and Merchant of Record platforms based on their fees, strengths, limitations, and ideal use cases.

The fees below are indicative. Actual pricing may vary by country, card type, payment method, transaction volume, and negotiated agreement.

1. Stripe #

Stripe remains one of the leading payment platforms for European SaaS companies, technology startups, and online businesses.

Its APIs support card payments, subscriptions, invoicing, marketplaces, fraud prevention, and a wide range of European payment methods.

Best for: SaaS companies, technology startups, marketplaces, and businesses that want to build their own payment infrastructure.

Indicative fees:

• Standard EEA cards: 1.5% + €0.25
• Premium EEA cards: 1.9% + €0.25
• UK cards: 2.5% + €0.25
• Other international cards: 3.25% + €0.25
• Additional currency conversion fees may apply

Pros:

• Strong developer tools: Offers detailed documentation, SDKs, APIs, and testing tools.
• European payment methods: Supports cards, SEPA, iDEAL, Bancontact, Klarna, Revolut Pay, and other regional methods.
• Subscription billing: Handles recurring payments, trials, invoices, plan changes, and payment retries.
• SCA support: Helps businesses manage Strong Customer Authentication and 3D Secure requirements.
• Marketplace tools: Supports platforms that need to collect and distribute payments.

Cons:

• Businesses remain responsible for VAT registrations, tax filings, and remittance.
• Flat transaction fees may become expensive for businesses processing large volumes.
• Complex usage billing and customer access control may require additional products and development.
• Smaller customers may find it difficult to access dedicated support.

2. Kelviq #

Kelviq is a Merchant of Record built for European AI startups, SaaS companies, APIs, developer tools, and digital product businesses selling globally.

Unlike a standard payment gateway, Kelviq becomes the legal seller for each transaction. It handles customer payments, EU VAT, global sales tax, invoices, refunds, and compliance, then sends the business a clean payout.

Kelviq supports SEPA payments, allowing European customers to pay directly from their bank accounts alongside other supported payment methods.

It is also designed for AI products and agents, where customers may be charged based on tokens, API calls, agent runs, workflows, credits, seats, or other forms of usage.

Best for: AI startups, AI agents, SaaS companies, APIs, developer tools, and digital product sellers expanding globally.

Indicative fees: Flat 3.9% + €0.40 per transaction.

There are no monthly platform fees or separate ingestion fees for reporting product usage.

Pros:

• EU VAT and global tax handling: Kelviq calculates, collects, and remits VAT, GST, and sales tax where required.
• SEPA payments: Supports bank payments through SEPA for European customers.
• Built for AI and agents: Supports tokens, API calls, agent runs, workflows, credits, top-ups, seats, subscriptions, and pay-as-you-go pricing.
• Usage-based billing: Charge customers based on actual usage, fixed subscriptions, credits, or a combination of pricing models.
• Real-time access control: Check a customer’s plan, balance, credits, entitlements, or usage limits before an AI agent or workflow runs.
• Complete revenue system: Payments, subscriptions, usage metering, tax, invoices, refunds, and customer access are managed together.
• Entitlements: Control which features, limits, and products each customer can access.
• Reduced webhook work: Kelviq’s SDKs help teams manage usage reporting, feature access, and entitlements directly inside their products.
• Global selling: European founders can sell internationally without managing tax registrations in every market.

Cons:

• Not built for e-commerce or physical products.

3. Adyen #

Adyen is an enterprise payment platform used by large global retailers and technology companies.

It operates as both a payment processor and acquirer in many markets, helping large businesses manage online and in-person payments through one system.

Best for: Large enterprises, global retailers, marketplaces, and businesses processing significant payment volume.

Indicative fees:

Adyen generally charges a fixed processing fee plus the applicable payment-method fee. Card payments commonly use an Interchange++ pricing structure.

Pros:

• Unified commerce: Combines online, mobile, and physical store payments.
• Direct acquiring: May improve authorization rates and payment performance in supported markets.
• Detailed payment analytics and reporting: Provides detailed data on authorisation rates, payment failures, and customer behaviour.
• Fraud protection: RevenueProtect helps businesses identify and manage payment fraud.
• Global coverage: Supports businesses operating in multiple countries and currencies.

Cons:

• Generally not suitable for freelancers or very small businesses.
• Integration and onboarding can require significant technical resources.
• Pricing can be harder to estimate than flat-rate providers.

4. Mollie #

Mollie is a popular European payment platform for small and medium-sized businesses.

It focuses on simple setup, clear pricing, and easy access to local European payment methods.

Best for: European SMEs, e-commerce businesses, subscription companies, and growing online brands.

Indicative fees:

• EEA cards: Varies by country and card type
• Bancontact: Around 1.4% + €0.25, although pricing may vary by country, merchant agreement, and negotiated rates.
• iDEAL and Wero: Usually charged using a fixed transaction fee
• Custom pricing may be available for higher volumes

Pros:

• Local payment methods: Supports iDEAL, Wero, Bancontact, SEPA, Klarna, and other European methods.
• Easy setup: Businesses can often start without a complex technical integration.
• Clear dashboard: Provides a straightforward interface for payments, refunds, and reporting.
• Flexible payouts: Businesses may choose daily, weekly, or monthly settlement schedules.
• Transparent pricing: Standard plans generally avoid long contracts and hidden monthly fees.

Cons:

• Global coverage is not as broad as Stripe or Adyen.
• Complex usage-based billing may require additional systems.
• Not designed specifically for AI billing, credits, or real-time entitlements.

5. Checkout.com #

Checkout.com is designed for large digital businesses that want detailed control over payment performance.

It provides payment processing, local acquiring, fraud prevention, and data tools through a modular API.

Best for: High-volume e-commerce companies, fintech businesses, marketplaces, gaming platforms, and global digital companies.

Indicative fees: Custom pricing based on the business model, payment volume, markets, and risk profile.

Pros:

• Payment performance: Provides detailed information about failed and successful transactions.
• Local acquiring: Helps businesses process payments closer to their customers.
• Flexible APIs: Companies can choose the payment and fraud tools they need.
• Multiple currencies: Supports processing across a large number of currencies.
• Local payment methods: Supports a growing range of European payment options.

Cons:

• Requires a technical team to get the most value from the platform.
• Standard pricing is not published clearly.
• Better suited to established businesses than early-stage startups.

6. Revolut Business #

Revolut Business combines payment processing with business accounts, foreign exchange, cards, and international transfers.

Its payment gateway is particularly attractive to European businesses that already use Revolut for banking and currency management.

Best for: Cost-conscious European businesses, online stores, and companies already using Revolut Business.

Indicative fees:

• Domestic consumer cards (Visa/Mastercard): Around 1% + €0.20
• Revolut Pay: Around 1% + €0.20
• Domestic Amex consumer cards: Around 1.7% + €0.20
• Domestic commercial cards & all international cards: Around 2.8% + €0.20
• Fees may vary by country and business plan

Pros:

• Competitive domestic pricing: Domestic consumer card fees can be lower than many larger gateways.
• Revolut Pay: Offers a faster checkout for existing Revolut users.
• Business account integration: Payments settle into the company’s Revolut Business account.
• Currency management: Useful for businesses accepting and holding multiple currencies.
• Subscriptions: Supports one-time and recurring payments.

Cons:

• Advanced SaaS billing features are less developed than Stripe’s.
• The best experience generally requires using the broader Revolut Business system.
• Revolut is not a Merchant of Record, so businesses remain responsible for tax compliance.

7. Klarna #

Klarna offers flexible payment options such as Pay Now, Pay Later, and instalment payments.

It is widely used by European consumer brands that want to improve conversion rates and increase average order value.

Best for: B2C e-commerce, fashion, electronics, travel, beauty, and lifestyle brands.

Indicative fees: Pricing varies by country, payment option, business type, and transaction volume. Klarna does not publish fees publicly; third-party sources indicate European merchant fees of approximately 3.5–5.5% per transaction, though rates vary significantly.

Pros:

• Flexible payment options: Customers can pay immediately, later, or through instalments.
• Buyer familiarity: Klarna is widely recognised by European online shoppers.
• Merchant protection: Klarna generally handles the customer’s credit risk for approved transactions.
• Customer discovery: Merchants may gain exposure through Klarna’s shopping products.
• Online and in-person expansion: Klarna continues to expand beyond traditional online BNPL.

Cons:

• Fees can be higher than standard card processing.
• Not suitable for every type of product or customer.
• BNPL products face increasing consumer protection and regulatory attention.
• Does not replace a complete SaaS billing or tax system.

8. Worldline #

Worldline is one of Europe’s largest payment and transaction service providers.

It supports online payments, physical terminals, SEPA payments, local payment methods, and enterprise payment infrastructure.

Best for: Large retailers, banks, public organisations, utilities, transport companies, and regulated industries.

Indicative fees: Custom enterprise pricing, often based on an Interchange++ model.

Pros:

• European coverage: Supports a broad range of local payment methods and markets.
• SEPA experience: Provides infrastructure for SEPA transfers, Direct Debit, and instant payments.
• Omnichannel payments: Connects online payments with physical stores and terminals.
• Wero support: Worldline is involved in Wero merchant acceptance.
• Enterprise reliability: Designed for businesses processing large and important payment volumes.

Cons:

• Contracts and onboarding can be more complex than self-service platforms.
• Developer tools may feel less straightforward than Stripe or Mollie.
• Better suited to large organisations than small startups.
• In 2025, Worldline faced regulatory scrutiny and reputational risk following a fraud investigation involving its payment processing practices; businesses should review due diligence accordingly.

9. SumUp #

SumUp started as a card-reader provider and has expanded into online payments, payment links, invoicing, business accounts, and simple online stores.

It is designed for freelancers, small shops, independent professionals, and micro-businesses.

Best for: Freelancers, local stores, service businesses, market sellers, and micro-merchants.

Indicative fees:

• In-person payments: 1.69% (EU, pay-as-you-go)
• Online payments: 1.69% in the EU (e.g. Ireland); 2.5% in the UK
• No mandatory monthly fee on standard pay-as-you-go plans

Pros:

• Simple setup: Businesses can begin accepting payments without a complex integration.
• No fixed monthly cost: Suitable for businesses with irregular sales.
• Payment links: Accept online payments without building a full website.
• In-person payments: Offers card readers and point-of-sale tools.
• Business tools: Includes invoices, online store features, and business accounts in supported markets.

Cons:

• Online fees differ between the EU (1.69%) and the UK (2.5%); verify pricing for your specific market.
• Transaction fees may become expensive as volume grows.
• Limited support for advanced subscriptions, usage billing, and marketplaces.
• Not intended for complex software monetisation.

EU Payment Gateway Comparison #

Which EU Payment Gateway Should You Choose? #

The right provider depends on where your customers are, what you sell, and how much payment infrastructure you want to manage yourself.

For a European SaaS company or technology startup that wants to build its own payment system: Stripe offers flexible APIs, subscriptions, and broad support for European payment methods.

For an AI agent, AI API, SaaS product, or usage-based software company: Consider Kelviq. It combines card and SEPA payments, EU VAT, global tax compliance, subscriptions, credits, usage billing, and customer access in one platform.

For a large retailer operating both online and in physical locations: Adyen provides unified commerce, direct acquiring, and enterprise payment tools.

For a European SME that wants simple access to local payment methods: Mollie offers an accessible dashboard and support for methods such as iDEAL, Wero, Bancontact, and SEPA.

For a high-volume fintech or digital platform: Checkout.com provides detailed payment data, flexible APIs, and local acquiring.

For a business already using Revolut Business: Revolut’s payment gateway can provide competitive EEA card rates and direct integration with its banking system.

For a consumer brand that wants to offer flexible payments: Klarna can help provide Pay Later and instalment options.

For a large European organisation that needs SEPA, terminals, and broad local payment coverage: Worldline offers extensive enterprise infrastructure.

For a freelancer or small local business: SumUp provides a simple way to accept online and in-person payments without mandatory monthly fees.

The Wero Factor #

Wero is an important new European account-to-account payment option, but businesses should not yet treat it as a replacement for every local European payment method.

Online Wero payments are being introduced first in selected European markets, with expansion into additional countries planned.

Businesses selling in these markets should ask whether their payment provider supports Wero or has a clear integration plan. However, they should continue supporting established methods such as SEPA, iDEAL, Bancontact, Bizum, and BLIK based on where their customers live.

The Bottom Line #

There is no single best payment gateway for every European business.

Stripe is a strong choice for technical teams that want flexible payment infrastructure. Mollie works well for European SMEs that need local payment methods, while Adyen, Checkout.com, and Worldline are better suited to larger businesses with complex payment operations.

Revolut Business can be attractive for companies that want payments and business banking together. Klarna is valuable for consumer brands offering flexible payment options, while SumUp is designed for freelancers and small local businesses.

For European AI, SaaS, API, and digital product companies, payment processing is only one part of the problem. These businesses must also manage SEPA and card payments, VAT, subscriptions, usage-based pricing, credits, invoices, refunds, and customer access.

Kelviq is designed for this use case. It gives European software companies a way to sell globally without building separate systems for payments, tax, billing, metering, and entitlements.