List of the Top 3 Payment Processing Software for First Data in 2026

NMI Payments transforms payments from a backend function into a strategic growth driver. Designed for software companies. SaaS platforms, ISVs and ISO partners, it enables you to embed, brand, and monetize payments directly within your software—without becoming a PayFac or taking on compliance complexity. As a full-stack processor, acquirer, and technology partner, NMI manages underwriting, risk, and regulatory oversight behind the scenes. The result: faster go-to-market, stronger brand control, and new recurring revenue streams. With modular design and white-label flexibility, NMI adapts to your business model, whether you’re processing payments online, in-store, in-app, or unattended. Key Benefits Launch white-labeled payments in weeks, not months Control pricing, share in transaction revenue, and own the customer relationship Built-in compliance, risk, and fraud prevention tools Flexible integration via no-code, low-code, or full API access Developer-First Experience NMI’s developer environment bridges business and technical needs. Developers gain instant sandbox access, prebuilt SDKs, and intuitive APIs to test, integrate, and deploy quickly. Guided onboarding, dynamic sandbox simulations, and drop-in components make payments easier to build and maintain. Business teams can explore revenue opportunities through self-service tools and instant earnings insights. With NMI Payments, you can embed and scale payments without losing control—powering faster launches, stronger retention, and lasting growth

No web developer? No problem! Lack of a website? That's absolutely fine! Even if you haven't communicated with your web developer in a long time, it remains hassle-free! Our committed team will create a personalized one-page Checkout that caters to your specific requirements, incorporating all vital messaging and information. By simply using a Facebook account, we can link it to our custom-branded, mobile-responsive Checkout Page. Our efficient and interactive invoicing solutions are crafted to save both you and your customers precious time, ensuring that payments are received more promptly. Whether you opt for weekly, monthly, quarterly, or any mix of billing cycles, ensuring a steady revenue stream for your business has never been easier with our service. Boost your non-profit's fundraising capabilities with our cost-effective, tailored donation pages that are optimized for mobile viewing. Regardless of whether you operate a large retail space or just a Facebook page and Instagram account, our mobile-friendly Checkouts are designed to mirror your brand's distinct look and feel, and they can be ready the same day, alongside your merchant account setup, enabling you to concentrate on what really matters. Additionally, our innovative solutions simplify enhancing your online transactions while allowing you to engage more effectively with your audience, creating a seamless experience for everyone involved. Let us help you take your online presence to the next level effortlessly.

NMI Gateway is a purpose-built, partner-first payments platform that delivers white-label, omnichannel infrastructure across every merchant environment. Designed for ISOs, banks, fintechs, software companies and SaaS platforms, it empowers partners to offer secure, scalable, and customizable payment acceptance to their merchants. NMI does not sell directly to merchants; instead, it powers 4,000+ partners serving more than 1 million businesses worldwide. Unlike gateways that are tied to a single processor or acquirer, NMI gives partners complete control over branding, pricing, and merchant relationships. With over 150 processor connections, 125+ shopping cart integrations, and compatibility with 235,000+ payment devices, NMI Gateway provides unmatched flexibility across retail, e-commerce, in-app, mobile, and unattended payment environments. Its flexible APIs, SDKs, and webhooks allow developers to embed and scale payments quickly, manage multi-MID configurations, and create dynamic routing strategies that optimize performance and reduce vendor lock-in. Value-added modules extend its capabilities even further. Shopify integration supports embedded commerce experiences, while Bill Connect syncs payments with leading accounting platforms such as QuickBooks and Xero. Additional tools like network tokenization, recurring billing, and advanced fraud prevention strengthen security, reduce churn, and enhance transaction success rates. Centralized reporting and analytics give partners real-time insights into performance and transaction trends across channels. Processing over 5.8 billion transactions annually and powering more than $440 billion in payment volume, NMI Gateway transforms payments from a back-office function into a revenue-generating growth engine. With its modular design, global scalability, and partner-first approach, NMI enables businesses to innovate faster, retain customers longer, and deliver frictionless