Authorize.Net is a United States-based payment gateway service provider that allows merchants to accept payment cards and electronic checks via their website and over Internet Protocol (IP) connections. Founded in 1996, Authorize.Net is now a subsidiary of Visa Inc. Its service allows customers to enter credit card information and traffic directly to a website, unlike some alternatives that require a customer to register before making a payment transaction when making payment services.

Authorize.Net was founded in 1996, in Utah, by Jeff Knowles. Its primary market is SMEs. As of 2004 it had about 90,000 customers.

Authorize.Net was one of several companies acquired by Go2Net, a company supported by Microsoft founder Paul Allen in 1999 for $ 90.5 million in cash and inventory. Go2Net acquired InfoSpace in 2000 for approximately $ 4 billion; The authorization network was acquired by Lightbridge in 2004 for $ 82 million and then in 2007 by CyberSource.

Visa Inc. acquired CyberSource for $ 2 billion in 2010. Visa maintains Authorize.Net and Cybersource as a standalone service, [10] with Authorize.Net focuses on SMEs, and Cybersource focuses on international and extensive payment processing. At the time of the acquisition in 2010, the company’s CEO identified three priorities: expanding the e-commerce market, enhancing fraud detection and prevention, and improving data security. Since 2014, it has together with its parent company CyberSource approximately 450,000 customers.

In September 2004, Authorize.Net servers were hit by Distributed Denial of Service (DDoS). The DDoS attack took more than a week and caused a virtual shutdown of the payment gateway service. Attackers demanded money from in exchange for stopping the attack.

July 2, 2009, 23:00, the entire web infrastructure for Authorize.Net (main website, business gateway website, etc.) went offline and stayed all day on July 3, 2009. None of the more than 200,000 merchants using The Authorize.Net payment gateway tool was able to handle credit cards. Authorize.Net phone numbers were closed on July 3 due to July 4, as announced on their website (although the website was down at that time). Other companies with nearby offices have reported to the media that a fire has occurred. has launched a Twitter account that morning, but did not update its phones to make announcements to customers by July 5 when they re-phone.

Authorize.Net handles card payments and ACH for companies from small and medium-sized merchants. Offers fraud protection, repeat billing subscriptions, and easy payment options. In addition to major credit cards, it allows payments using PayPal, Apple Pay, and Visa Checkout, and it can integrate with Quickbooks. For developers, it provides application programming interfaces (APIs) and software development kits for Android and iOS. Virtual Terminal and Invoice can handle manual payments. It also offers recurring billing and plugin for integration with Authorize.Net and technical support is available for merchants.

Authorize.Net has most of the customers of any payment processor, and has been described as one of the more senior players in the payment processing industry, keeping the “decent part” of the market share market.