Payments as a service (PaaS) is a marketing phrase used to describe a software as a service to connect a group of international payment systems. The architecture is represented by a layer - or overlay - that resides on top of these disparate systems and provides for two-way communications between the payment system and the PaaS. Communication is governed by standard APIs created by the PaaS provider.
Since the 1980s, credit cards and international wire transfer systems like the Society for Worldwide Interbank Financial Telecommunication (SWIFT) were primary methods for making and receiving electronic cross-border payments. Within individual countries, payers and payees have used various electronic systems to make such payments. In the United States, for instance, the Federal Reserve Bank operates the automated clearing house (ACH) system. In most EU countries direct debit is the preferred method of facilitating electronic payments.
With the advent of the World Wide Web, it became necessary to provide alternative payment systems. At first, consumers were hesitant to use their credit cards on the Web due to security concerns. Entrepreneurs tried to market an "electronic wallet". As early as 1994, CyberCash allowed consumers to make secure purchases over the Internet.
CyberCash eventually failed. In March of 2000, PayPal was formed and became a predominant electronic wallet in the U.S. Similar regional services include WebMoney and Yandex.Money in Russia and Alipay in China. While popular in their own countries, these do not have significant global reach. PayPal and Moneybookers (Skrill) became regional electronic wallets, providing greater liquidity, but still do not provide for the free flow of funds between all popular electronic wallet solutions.
PaaS is designed to allow merchants and other market participants to utilize local, regional and global payments options through a single interface. The complexity of moving funds between providers is handled by the PaaS layer and is hidden from the user. Generally speaking, there is only one interface between a merchant and PaaS. Because only one interface is required, merchants or users are only required to maintain one financial repository.
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