Authorize.net

Authorize.net (owned by the colossal global titan Visa) is a profoundly historic, heavily entrenched, and deeply traditional enterprise platform. It operates as the unquestioned, undisputed "Godfather of E-Commerce Gateways." Long before Stripe existed, Authorize.net was the absolute default mathematical bridge between an early 2000s website and a traditional corporate merchant bank account. The absolute core superpower of Authorize.net is its "Terrifying Legacy Compatibility and Traditional Merchant Routing." It is not a modern 'payment aggregator' like Stripe. It is a pure Gateway. It mathematically allows a massive, highly traditional corporation to keep their 30-year-old relationship with a traditional bank (like Chase or Wells Fargo), but mathematically routes the internet transactions through their highly secure Visa-backed pipes. Because it completely dominates the massive legacy architecture of traditional corporate retail, offering unparalleled compatibility with ancient shopping carts, massive Visa-backed security, and deep traditional banking ties, it is the inescapable standard for legacy B2B corporations, traditional retailers, and massive established medical practices.