Best Government Payment Processing Software

NMI Payments is an embedded payments solution that lets SaaS platforms, Software companies and ISVs integrate, brand, and manage payment acceptance directly within their software—without becoming a PayFac or building complex infrastructure. As a full-stack processor, acquirer, and technology partner, NMI handles onboarding, compliance, and risk so you can stay focused on growth. The modular, white-label platform supports omnichannel payments, from online, mobile and in-app to in-store and unattended. Choose from full-code, low-code, or no-code integration paths and launch in weeks, not months. Built-in risk tools, flexible monetization, and customizable branding help you scale faster while keeping full control of your experience. With NMI’s developer-first tools, sandbox testing, and modern APIs, you can embed payments quickly and confidently.

Unlock effortless payment processing solutions with The Card Association. Our comprehensive array of setup options ensures seamless transactions for your business needs. Whether you require traditional card reader payments, convenient mobile payment capabilities, robust e-commerce solutions, or fully integrated POS (point of sale) applications, we have you covered. With our user-friendly interface and versatile platform, you can easily navigate through various payment methods to cater to your diverse clientele. Our team is dedicated to providing you with top-notch support and guidance every step of the way, ensuring a smooth transition and optimal performance. Experience the convenience and efficiency of modern payment processing with The Card Association. Join countless satisfied merchants who have streamlined their transactions and elevated their business operations. Discover why businesses trust us for secure, reliable, and customizable payment solutions.

OneBill is an end-to-end subscription management, billing, and revenue management platform that powers the entire customer lead-to-revenue generation experience. OneBill supports all types of billing models such as one-time billing, subscription billing, recurring billing, and usage-based billing. OneBill’s seamless integration with other enterprise systems such as carriers & service providers, payment gateways, accounting & admin, taxation, and CRM & ERP platforms is made possible with open APIs. The platform covers all aspects of a business from CPQ, automated order provisioning & activation, billing & invoicing, all the way to revenue reporting, customer subscription management, and channel partner commission management. OneBill has been helping SMBs, SMEs, and large enterprises to reduce billing errors, compliance risk and drive greater efficiency with an end-to-end billing and revenue management solution fully integrated with some of the world’s leading solutions.

Cutting Edge Payment Processing Gateway with Enterprise Features and Real-Time Metrics

Paddle is a subscription commerce and billing platform for Software and SaaS companies. It’s more difficult than ever to keep up with customer demands, to find new international growth opportunities, and to manage your internal resources effectively. With Paddle, you spend less time on fixing internal roadblocks and can focus on scaling your business. Paddle provides a full suite of tools from optimized checkout to sell your software, to recurring billing, fraud detection, manual invoicing, sales taxes, global currencies, customer support, analytics and much more, all in one platform. Choose how you want to sell, Paddle supports every type of sales motion. Optimize your checkout for conversions, scale your sales-assisted invoicing to more business accounts, and add subscription billing

Easy Pay Direct is the fastest safe way to process payments. We offer full service merchant accounts so you can worry less about account shutdowns, holds and reserves and focus more on your business. From its conception, Easy Pay Direct was designed to make your life easier. From our staff to the technology within the solution itself, we are here to help. Business owners need products that are efficient, effective, and, most importantly, easy to use. You have enough on your plate; processing credit cards should not be a headache. Easy and seamless integration to over 250 shopping carts, recurring billing, decline recovery, chargeback management, custom payment links, white glove customer service, plus so much more. Our customer service is here to help, and we are always a call, text, or email away whenever you need us. Find out why the nation's top entrepreneurs trust Easy Pay Direct. Notable clients: Grant Cardone, Frank Kern, Wes Watson, Fortune Builders & More

Payrix is on a mission to be the global leader in embedded payments for vertical software businesses. We are committed to giving our clients more freedom and peace of mind with a proven solution that helps eliminate friction, unleash their possibilities with new revenue, and make their customers’ lives easier. Payrix clients including Real Green Systems, Storable, iClassPro and SupporterHub have harnessed our unique, all-in-one platform — combined with a white-glove approach — that enables them to capitalize on the opportunities within embedded payments for growth, innovation, and transformation.

SDK.finance is a white-label core payments platform, serving as a backbone for building fintech products on top. Available in cloud PaaS and on-premise with the source code license versions, the platform caters to businesses of all sizes - from startups seeking affordable software to SMBs and enterprises that need scalability and independence.

CARDZ3N supports global payments for credit cards, ACH, SEPA, and Crypto (140+ coins). CARDZ3N processes payments for emerging markets & high-risk businesses, including CBD, crypto exchanges, gambling, travel, and more. We also offer a Stripe Alternative with rates starting at 2.25% for non-profits & 2.75% & $0.25 for e-commerce. CARDZ3N also offers other payment options, such as ACH, payroll and HR, benefits, or business capital. CARDZ3N Our mission is to solve the most pressing problems facing our clients, large and small. Our unique approach is what distinguishes us and what makes us different. We offer a wide range of services and solutions that help organizations achieve their vision, facilitate change, and maximize performance and productivity.

Day-In, Day-Out uniCenta software helps thousands of people all around the world save their business time and money. uniCenta is not the usual run-of-the-mill legacy Point Of Sale software developer. We are a small team dedicated to bringing you innovative Point Of Sale apps. Run the full version of uniCenta oPOS on any smartphone, tablet or countertop machine with a browser. Send orders to a local kitchen, packing or warehouse display wherever it’s located. Strengthen your customer connection and reinforce your brand. Blend In-store prepayments with online store purchases. This app' will earn you money and pay you for every transaction you make.

NMI Gateway is a white-label, omnichannel payment platform for ISOs, banks, software companies and fintechs that want to deliver secure, scalable and customizable payment acceptance. Supporting online, in-store, in-app, mobile and unattended commerce, NMI Gateway integrates with 150+ processors, 125+ shopping carts and multiple business platforms. NMI does not sell directly to merchants, we power 4,000+ partners serving over 1 million merchants worldwide and give them control over branding, pricing and merchant relationships, backed by developer-friendly APIs and modular functionality. Key capabilities include omnichannel support, white-label customization, multi-MID management, P2P encryption, advanced fraud prevention, centralized reporting and compatibility with 235,000+ devices. Processing 5.8B+ transactions annually and $440B+ in volume, NMI Gateway delivers the flexibility, scalability and security partners need to support merchants of all sizes through one centralized platform.