Stax Payments

Stax Payments (formerly Fattmerchant) is a fiercely agile, highly innovative, and mathematically brilliant platform. It operates as the absolute apex predator of "Subscription Flat-Fee Processing." While Stripe and Square take a mathematical percentage of every single sale (punishing businesses that sell high-ticket items), Stax built a massive empire by completely eliminating the percentage markup. The absolute core differentiator of Stax is its "0% Markup Subscription Architecture." A merchant pays a flat monthly SaaS fee (e.g., $99/month). In exchange, Stax mathematically passes through the exact, raw, wholesale cost of the credit card directly from Visa with absolutely zero percentage markup. If a merchant sells a $10,000 piece of machinery, they save hundreds of dollars mathematically compared to Square. Because it completely revolutionized processing for high-volume and high-ticket businesses, offering unparalleled flat-fee transparent pricing, massive omnichannel APIs, and robust invoicing, it is heavily favored by massive medical practices, luxury retail, and high-volume B2B distributors.