Adyen (OTC:ADYE.Y) isn't exactly a household name to most U.S. investors, but it certainly belongs in the same conversations as Block and PayPal.
Based in the Netherlands, Adyen provides payment processing solutions to businesses and has operations around the world (including a large U.S. presence). It offers payment solutions for in-person, online, and mobile channels. But, unlike the other major payment processing tech companies, Adyen focuses almost exclusively on large businesses. Microsoft (MSFT +0.56%), Uber (UBER -0.57%), and McDonald's (MCD -0.38%) all rely on Adyen for their payment processing needs. You may recall that eBay dropped PayPal as its preferred payment processor several years ago; that was in favor of Adyen.