Checkout.com offers companies to accept payments around the world through one application program interface. It facilitates an integrated payment processing platform allowing the processing of payments in real-time, sending payouts, issuing, processing, and managing card payments. It also offers fraud prevention and secure authentication. The company was formerly known as Opus Payments. It was founded in 2012 and is based in London, United Kingdom.

Stripe operates as a technology company that specializes in online payment processing and financial infrastructure for Internet businesses. The company provides a suite of products that enable businesses to accept payments, manage billing and subscriptions, handle in-person transactions, and integrate various financial services into their operations. Its platform is designed to support startups, enterprises, and everything in between with scalable, API-driven solutions. Stripe was formerly known as DevPayments. It was founded in 2010 and is based in South San Francisco, California.

Airwallex develops a global financial platform focusing on providing business payment solutions within the financial technology domain. The company offers an array of services including global business accounts for managing finances, international transfers, multi-currency corporate cards, and online payment processing capabilities. It primarily serves the payment industry. The company was founded in 2015 and is based in Melbourne, Australia.

Wallet Engine is an embedded finance gateway specializing in cross-border applications within the fintech sector. The company provides a platform and APIs that enable apps to create in-app financial accounts, including electronic Know Your Customer (e-KYC), card issuance, and integration with financial network partners for fund transactions. The primary customers are businesses that require embedded financial services within their applications, such as e-commerce platforms and digital wallets. Wallet Engine was formerly known as Cheers Paytech. It was founded in 2019 and is based in Singapore, Singapore.

Cashfree Payments is a payments and banking technology company that specializes in enabling businesses to collect payments and make payouts. The company offers a suite of products that facilitate online payment collection, vendor payouts, wage disbursements, instant loan disbursements, e-commerce refunds, and more, without requiring technical expertise from users. Cashfree Payments primarily serves industries such as e-commerce, education, and financial services. It was founded in 2015 and is based in Bengaluru, India.

PayU provides global payments and financial technology, solutions. The company offers a global payment platform that enables merchants to process online payments, optimize transaction approval rates, and utilize advanced security and anti-fraud measures. PayU primarily serves the ecommerce industry, providing financial services and payment solutions to businesses looking to expand their reach in emerging markets. It was founded in 2002 and is based in Hoofddorp, Netherlands. PayU operates as a subsidiary of Naspers.