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Mastercard is a global payment technology company that facilitates electronic funds transfers worldwide. They are best known for their branded credit cards, debit cards, and prepaid cards, providing secure and convenient payment options for consumers and businesses across various industries.

Payplug is a French omnichannel payment solution dedicated to merchants, offering a range of services for both online and in-store transactions. It provides easy integration with e-commerce platforms, customizable payment pages, and tools for managing recurring payments. Payplug's focus on security and fraud prevention, combined with its user-friendly interface and local market expertise, makes it a popular choice for businesses operating in France and other European countries.

American Express, also known as Amex, is a multinational financial services company that provides various payment products, including credit cards, charge cards, and traveler's cheques. They offer a range of services for consumers and businesses, focusing on premium cardholders and corporate clients.

Stripe is a technology company that provides a comprehensive suite of payment processing solutions for internet businesses. Their services include online payment processing, fraud prevention, invoicing, and subscription management, enabling businesses to easily accept and manage online payments.

Visa is a multinational financial services corporation that facilitates electronic funds transfers globally, primarily through Visa-branded credit cards, debit cards, and prepaid cards. They provide secure, reliable payment processing solutions for consumers, businesses, and financial institutions worldwide.