Compare NMI Payments vs. Stacks

NMI Payments gives developers, SaaS builders, ISVs and ISOs a simple path to embedded payments. As a full-stack processor, acquirer, and technology partner, NMI enables you to integrate, brand, and manage payment acceptance within your platform—without becoming a PayFac or building complex infrastructure. The platform combines flexibility, scalability, and speed, offering white-labeled payments infrastructure that keeps your brand front and center. With omnichannel support for in-store, online, in-app, and unattended payments, you can deliver a consistent merchant experience across every touchpoint. NMI also manages onboarding, compliance, and risk, freeing your team to focus on innovation and customer growth. Developer-First Experience NMI’s developer-first environment puts full control in your hands. Build, test, and launch payments in a modern sandbox with clear documentation and ready-to-use code snippets. Guided onboarding flows and API recipes simplify integration, while low-code and no-code tools accelerate deployment. Business users can evaluate monetization options with instant revenue calculators and self-service sign-up. Whether you’re embedding payments for the first time or scaling across channels, NMI helps you go live faster, stay compliant, and grow with confidence

Welcome to a seamless blend of innovative hardware, software, and payment solutions tailored specifically for the unique requirements of your business. Stacks is designed to facilitate smooth in-store and online transactions through the Stacks POS System and Stacks Payment Gateway, ensuring a hassle-free experience. Interested in discovering more? Reach out to a Stacks Specialist who can guide you through how our unique POS and Payment solutions, driven by WAVit Technology, can enhance your business's growth trajectory. With unmatched reliability and expertise, Stacks is the ideal payments partner for any type of business, whether you're a cherished local retailer or managing a vast restaurant chain across multiple states. You deserve a partner who understands your operations and specific needs. Stacks takes pride in providing an extensive array of cutting-edge payment processing solutions that enable you to maximize value with every transaction. If you are currently processing credit card payments, our offerings are guaranteed to outshine your existing rates, making a significant difference in your overall costs. Additionally, we are committed to continuously evolving our services to meet the dynamic needs of your business.