European & open-source alternatives to Stripe

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Adyen

This financial technology platform provides end-to-end payment processing, data management, and financial products for large…

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GoCardless

Bank-to-bank payments and recurring direct-debit collection for businesses.

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Mollie

Mollie is a financial technology group that provides online and in-person payment processing, money management, and funding…

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Payplug

A payment solution that helps merchants and e-merchants process transactions and optimize payment performance, primarily in…

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Twikey

Twikey is a fintech company that provides smart software to help businesses and organizations improve their cash flow by…

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Unzer

Berlin full-stack payment provider (formerly Heidelpay) offering online, terminal, pay-by-link and instalment payments across…