Stripe provides a suite of application programming interfaces (APIs) for online payment processing and commerce solutions across various business sectors. The company offers services such as payment acceptance, subscription management, invoicing, sales tax automation, revenue recognition, and financial data analysis. Stripe serves various sectors including ecommerce, marketplaces, and platforms. Stripe was formerly known as DevPayments. It was founded in 2010 and is based in South San Francisco, California.

PayU focuses on enabling local and cross-border payments as well as providing financial services. It offers a payment platform that facilitates online payment processing and payment gateway services. It primarily serves sectors such as e-commerce, hospitality, and marketplace solutions. It was founded in 2002 and is based in Hoofddorp, Netherlands. It operates as a subsidiary of Prosus.

SumUp operates provides payment processing and point-of-sale solutions for small businesses. It offers products including card readers, point of sale (POS) systems, and financial management tools to facilitate transactions and manage business operations. SumUp serves small to medium-sized enterprises across sectors such as retail and food and beverage. SumUp was formerly known as Ka-Ching Payments. It was founded in 2012 and is based in Wilmington, Delaware.

Ingenico specializes in payment acceptance and services across various sectors including retail, transportation, and hospitality. The company offers products and services that facilitate payment transactions, including smart terminals, a cloud-based payments platform, and terminal management solutions. Ingenico also provides services such as loyalty programs, gift card services, and currency conversion. It was founded in 1980 and is based in Suresnes, France. In February 2020, Ingenico was acquired by Worldline at a valuation of $8600M.

Checkout.com operates as a financial technology company offering a payment platform for businesses. The main services include processing payments, sending payouts, and managing card programs through a cloud-based solution. The platform supports a range of payment methods, includes fraud detection, compliance, and risk management, and provides tools for payment management. Checkout.com was formerly known as Opus Payments. It was founded in 2009 and is based in London, United Kingdom.

Interac operates as a financial technology company offering digital payment solutions and identity verification services. The company provides services such as Interac Debit for in-store payments, Interac e-Transfer for sending and receiving money online, and Interac Direct for online shopping payments. Interac also offers solutions for individuals and businesses to authenticate identities and transactions. Interac was formerly known as Interac Association. It was founded in 1984 and is based in Toronto, Canada.