PayPal

PayPal is an American financial-technology company that operates a global online payments platform. Its services let individuals and businesses send, receive, and manage payments online.

Payment gateway: Software that securely transmits payment details between a merchant and payment processors. PayPal can provide the checkout interface and transaction routing that a gateway supplies.
Confinity: A company founded in 1998 that developed security software and an early electronic payment service. Confinity created the payment service that became central to PayPal’s early business.
Venmo: A mobile payment service owned by PayPal, known for person-to-person transfers and social payment features. Venmo extends PayPal’s reach into mobile payments and social person-to-person transactions.
Stripe: A financial-technology company that provides payment processing and related tools for businesses. Stripe competes with PayPal in online merchant payments but emphasizes developer-oriented infrastructure.
Payment processor: A company or service that routes card transactions between merchants, banks, and card networks. PayPal processes transactions by coordinating authorization and movement of funds.
X.com: An online financial-services company founded by Elon Musk in 1999. X.com merged with Confinity, forming the company that adopted the PayPal name.
Braintree: A payment technology company acquired by PayPal in 2013 that provides tools for businesses to accept payments. Braintree supplies payment infrastructure for merchants and digital businesses within PayPal’s portfolio.
Apple Pay: Apple’s digital wallet and payment service for in-store, online, and in-app purchases. Apple Pay relies closely on Apple devices, unlike PayPal’s cross-platform account-based service.
ACH network: A United States electronic funds-transfer network used for bank-to-bank payments. Bank transfers into and out of PayPal can rely on ACH processing.
PayPal Mafia: A group of former PayPal employees who later founded or led prominent technology companies. PayPal’s early team became a notable source of founders and executives across Silicon Valley.

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