Opayo vs. Flatpay

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

Quickly and effortlessly accept all types of payments with a focus on security and simplicity. Whether you're selling in-store or online, processing card payments is seamless and straightforward. The invoicing process can be efficiently managed, allowing for easy creation, sending, and tracking. If your customer isn't present, remote credit card transactions can be processed over the phone or through your computer. Square simplifies the experience of establishing and expanding your online store, enabling you to receive payments smoothly. With Square, accepting card payments is designed to be fast, secure, and hassle-free, ensuring there are no hidden fees or lengthy contracts involved. Trust in the reliability of rapid and secure payment processing to enhance your business operations. Additionally, you can focus on what you do best while leaving the complexities of payment handling to Square.

EBizCharge stands out as a premier provider of integrated payment solutions, enabling businesses to streamline electronic payment processing, bolster transaction security, and boost their profit margins. By equipping companies with the essential tools for faster, safer, and more cost-effective transactions, EBizCharge delivers a top-tier payment processing experience. Their applications adhere to PCI compliance and seamlessly integrate with leading ERP and accounting systems such as QuickBooks, various Sage ERP products, SAP Business One, Microsoft Dynamics, NetSuite, Epicor, and Acumatica, alongside major online shopping platforms like Magento, WooCommerce, and Volusion. This comprehensive integration ensures that businesses can operate efficiently while maintaining high standards of security and convenience.

PayKings is a specialized high-risk payment processing company that provides merchant account services, payment gateways, and transaction management solutions for businesses operating in challenging or heavily regulated industries. The company focuses on helping merchants secure payment processing approvals when traditional financial institutions and payment providers may decline applications due to industry risk classifications. Its automated underwriting system accelerates the approval process, allowing many businesses to begin accepting payments within as little as 24 hours. PayKings supports more than 50 industries, including CBD, firearms, dating services, adult businesses, online gaming, nutraceuticals, travel, cryptocurrency, debt settlement, and other high-risk sectors. The platform offers a comprehensive suite of payment solutions, including online credit card processing, ACH transactions, recurring billing, mobile payments, virtual terminals, point-of-sale systems, and mail order or telephone order processing. Fraud prevention and chargeback management tools help merchants minimize transaction risks while protecting revenue streams. Flexible integration options support major payment gateways, shopping carts, eCommerce platforms, content management systems, and custom development environments through APIs and SDKs. Businesses benefit from dedicated account management, onboarding assistance, and support teams familiar with the unique challenges associated with high-risk industries. Transparent pricing structures and scalable service options accommodate organizations ranging from startups to high-volume enterprises. With extensive experience in high-risk payment processing, PayKings helps businesses secure reliable payment acceptance capabilities while maintaining compliance, security, and operational efficiency.

Square POS is an easy-to-use point-of-sale solution that offers a comprehensive array of features for managing various retail operations. Users can efficiently track inventory and sales, process payments online, and issue digital receipts. This versatile system is compatible with both Android and iOS devices. Notably, Square POS can operate offline by saving transaction data locally, automatically syncing with the cloud once an Internet connection is reestablished. Users can keep track of essential details like product names, pricing, and quantities with ease. Additionally, it includes functionalities such as barcode scanning, discount applications, credit card processing, gift card management, and the ability to handle refunds, making it a valuable tool for businesses of all sizes. With its user-friendly interface and robust capabilities, Square POS is designed to enhance the overall customer experience while streamlining operations.

Convesio is an all-in-one hosting and payment solution built to help ecommerce and WordPress businesses grow with speed, stability, and confidence. Unlike traditional hosts, Convesio combines enterprise-grade managed hosting with ConvesioPay — a fully integrated payment processing system designed to simplify how online stores handle transactions. The result is faster checkout performance, fewer integration headaches, and complete visibility into revenue — all from one dashboard. Backed by scalable container technology, PCI-compliant infrastructure, and 24/7 expert support, Convesio empowers WooCommerce merchants to focus on growth instead of maintenance. Why Choose Convesio: Integrated payment processing with ConvesioPay Fast, reliable, and scalable hosting built for WooCommerce PCI-compliant and security-focused by design One platform for hosting, payments, and performance insights 24/7 expert support from ecommerce specialists

Melio serves as a streamlined accounts payable solution aimed at enhancing bill payment processes, optimizing operational workflows, and boosting cash flow management for businesses of all sizes. To get started, try all of Melio's features free for 30 days! Melio’s platform enables users to make payments to vendors via online bank transfers or credit and debit cards, even when those vendors only accept checks, which not only helps in managing cash flow but also allows users to earn rewards. Melio integrates seamlessly with accounting software such as QuickBooks and Xero, ensuring that your financial records remain current. With Melio, you’ll get to streamline your day-to-day work. Either input vendor information or bill details manually, upload documents, or take a photo of the invoice for quick processing—it’s incredibly user-friendly. Payments can be scheduled in alignment with your cash flow strategy, and Melio will make those payments happen. International vendors? Our platform facilitates payments to global vendors in USD or the local currency, ensuring smooth transactions for various services and products. This comprehensive approach makes managing accounts payable more efficient and less stressful than ever before. Finally, no matter where your business takes you, Melio can follow—just be sure to download the mobile app, available on iOS and Android, to manage your business payments on the go.

Best-in-class, Fraud.Net offers an AI-driven platform that empowers enterprises to combat fraud, streamline compliance, and manage risk at scale—all in real-time. Our cutting-edge technology detects threats before they impact your operations, providing highly accurate risk scoring that adapts to evolving fraud patterns through billions of analyzed transactions. Our unified platform delivers complete protection through three proprietary capabilities: instant AI-powered risk scoring, continuous monitoring for proactive threat detection, and precision fraud prevention across payment types and channels. Additionally, Fraud.Net centralizes your fraud and risk management strategy while delivering advanced analytics that provide unmatched visibility and significantly reduce false positives and operational inefficiencies. Trusted by payments companies, financial services, fintech, and commerce leaders worldwide, Fraud.Net tracks over a billion identities and protects against 600+ fraud methodologies, helping clients reduce fraud by 80% and false positives by 97%. Our no-code/low-code architecture ensures customizable workflows that scale with your business, and our Data Hub of dozens of 3rd party data integrations and Global Anti-Fraud Network ensures unparalleled accuracy. Fraud is complex, but prevention shouldn't be. With FraudNet, you can build resilience today for tomorrow's opportunities. Request a demo today.

Revaly is built to solve one of the most costly and overlooked problems in subscription commerce: legitimate payments failing for preventable reasons. Its end-to-end Payment Performance Management platform leverages machine learning, issuer intelligence, and ecosystem data to elevate approval rates starting from the very first transaction attempt. The system automatically detects issues such as mistyped card numbers, routing mismatches, and metadata errors before a customer ever checks out. When payments do fail, Revaly uses a sophisticated retry engine that studies customer behavior, card network patterns, and historical success windows to recover revenue without damaging relationships. Businesses across industries report dramatic improvements—from 34% to over 50% increases in recovered payments—demonstrating the compound value of consistent, optimized approvals. Revaly’s integration ecosystem makes adoption frictionless, connecting seamlessly with CRMs, billing systems, payment gateways, and processors already in use. The platform not only protects revenue but stabilizes growth by reducing churn that comes from unintentional payment failures. Leadership teams gain visibility into payment performance metrics that go far beyond authorization rates, revealing hidden revenue opportunities and operational inefficiencies. As a result, companies can build smarter billing strategies and deliver a more reliable experience for customers. Revaly becomes a trusted partner in improving profitability, ensuring that when a customer says “yes,” the payment system does too.

Gr4vy empowers businesses to grow and launch new services and opportunities without the burden of extra costs, resources, or development time. With our cloud-based system, managing payment methods, services, and transactions becomes streamlined and centralized, significantly lowering the chances of single points of failure and vulnerabilities associated with shared infrastructure. By providing a wide range of options, from local payment methods to buy-now-pay-later solutions, Gr4vy enriches the checkout experience for customers, ensuring they have greater flexibility with just a few clicks. Our no-code tools make it incredibly easy to add, test, and deploy new payment providers in just minutes, negating the need for lengthy development processes. In using Gr4vy, businesses incur costs solely for the services they actively use, which simplifies both our platform and pricing structures. There are no cumbersome flat rates or per-transaction fees; rather, Gr4vy scales alongside your business, offering an ever-expanding selection of payment options, services, and providers as your needs change, ensuring you are always ready to tackle future challenges. This dedication to flexibility and growth allows you to concentrate on what truly matters—advancing your business and achieving its goals. Ultimately, Gr4vy not only enhances operational efficiency but also positions your business for long-term success in an evolving market.