Worth USD2bn, Adyen is a bona fide fintech success story. The payments firm is now opening its numbers revealing it has now processed USD50bn, took in USD350m in revenue last year and is profitable. It’s a rare glimpse into the finances of a private company and as such it’s hard to make any other comparisons. Basic data, including how profitable it is and by what metric, isn't revealed. Public companies are a different beast altogether, having to regularly disclose such figures. Here some of the biggest public companies in fintech are dissected.