PayPal Holdings, Inc. is an American multinational financial technology company operating an online payments system in the majority of countries that support online money transfers; it serves as an electronic alternative to traditional paper methods such as checks and money orders. The company operates as a payment processor for online vendors, auction sites and many other commercial and company users, which involve a fee.

Established in 1998 as Confinity, PayPal went public through an IPO in 2002. It became a wholly owned subsidiary of eBay later that year, valued at $1.5 billion. In 2015, eBay spun off PayPal to its shareholders, and PayPal became an independent company again. The company was ranked 143rd on the 2022 Fortune 500 of the largest United States corporations by revenue.

The company was originally established by Max Levchin, Peter Thiel, and Luke Nosek in December 1998 as Fieldlink. Later it was renamed Confinity, a company which developed security software for hand-held devices. When it had no success with that business model, it switched its focus to a digital wallet. The first version of the PayPal electronic payments system was launched in 1999.

In March 2000, Confinity merged with X.com, an online financial services company founded in March 1999 by Elon Musk, Harris Fricker, Christopher Payne, and Ed Ho. Musk was optimistic about the future success of the money transfer business Confinity was developing. Musk and Bill Harris, then-president and CEO of the combined X.com, disagreed about the potential future success of the money transfer business and Harris left the company in May 2000. In October 2000, Musk decided that X.com would terminate its other internet banking operations and focus on payments.

In the same month, Elon Musk was replaced by Peter Thiel as CEO of X.com, which was renamed PayPal in June 2001 and went public in 2002. PayPal's IPO listed on NASDAQ under the ticker PYPL at $13 per share and generated over $61 million.

Shortly after PayPal's IPO, eBay acquired the company on October 3, 2002, for $1.5 billion in eBay stock. More than 70 percent of all eBay auctions accepted PayPal payments, and roughly 1 in 4 closed auction listings were transacted via PayPal. PayPal became the default payment method used by the majority of eBay users, and the service competed with eBay's subsidiary Billpoint, as well as Citibank's c2it, Yahoo!'s PayDirect, and Google Checkout.

In 2005, PayPal acquired the VeriSign payment solution to provide added security support. In 2007, PayPal announced a partnership with MasterCard, which led to the development and launch of the PayPal Secure Card service, a software that allows customers to make payments on websites that do not accept PayPal directly. By the end of 2007, the company generated $1.8 billion in revenue. In January 2008, PayPal acquired Fraud Sciences, a privately held Israeli start-up that developed online risk tools, for $169 million.

In November 2008, the company acquired Bill Me Later, an online transactional credit company.

By 2010, PayPal had over 100 million active user accounts in 190 markets through 25 different currencies. In July 2011, fourteen alleged members of the Anonymous hacktivist group were charged with attempting to disrupt PayPal's operations. The denial of service attacks occurred in December 2010, after PayPal stopped processing donations to WikiLeaks. On 5 December 2013, 13 of the PayPal 14 pleaded guilty to misdemeanor and felony charges related to the attacks.

It was announced on September 30, 2014, that eBay would spin off PayPal into a separate publicly traded company, a move demanded in 2013 by activist hedge fund magnate Carl Icahn. The spin-off was completed on July 18, 2015. On July 20, the company was relisted on Nasdaq under the same ticker symbol it used shortly before it was acquired by eBay, PYPL. On January 31, 2018, eBay announced "After the existing eBay-PayPal agreement ends in 2020, PayPal will remain a payment option for shoppers on eBay, but it won't be prominently featured ahead of debit and credit card options as it is today.

PayPal will cease to process card payments for eBay at that time." The company will "instead begin working with Amsterdam-based Adyen".

On July 1, 2015, PayPal announced that it was acquiring digital money transfer company Xoom Corporation. PayPal spent $25 a share in cash to acquire the publicly traded Xoom, or about $1.09 billion. The deal was closed in the fourth quarter of 2015. The move strengthened PayPal’s international business, giving it access to Xoom’s 1.3 million active U.S. customers that spent about $7 billion in the 12 months ending on March 31, to people in 37 countries.

On September 1, 2015, PayPal launched its peer-to-peer payment platform "PayPal.Me", a service that allows users to send a custom link to request funds via text, email, or other messaging platforms. Custom links are set to be structured as PayPal.me/username/amount requested. PayPal.Me was launched in 18 countries including the United States, United Kingdom, Germany, Australia, Canada, Russia, Turkey, France, Italy, Spain, Poland, Sweden, Belgium, Norway, Denmark, Netherlands, Austria, and Switzerland.

PayPal had 170 million users, as of September 2015, and the focus of PayPal.Me was to create a mobile-first user experience that enables faster payment sharing than PayPal's traditional tools.

The fiscal year for PayPal is from January 1 to December 31. For fiscal year 2019, PayPal reported earnings of US$2.459 billion, with an annual revenue of $17.772 billion, an increase of 15% over the previous fiscal cycle. PayPal's shares traded at over $108 per share, and its market capitalization was valued at over $127.58 billion in December 2019.

The COVID-19 pandemic has accelerated the growth of digital payment platforms, including PayPal, at the expense of the traditional banking sector. As a result, PayPal has seen an increase in its stock to up to 78% in 2020 as of October. In addition, total payment volume has increased 29% amounting to $220 billion increasing positive investor sentiment.

PayPal laid off hundreds of workers across US offices and moved jobs overseas during the 2020-2022 pandemic.