Best Payment Facilitation (PayFac) Platforms for Linux of 2025

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

Payrix has a mission: to be the world's leader in embedded payments for vertical business software. Our goal is to give our clients more freedom, peace of mind, and a proven solution that eliminates friction, opens up new revenue opportunities, and makes life easier for their customers. Payrix clients such as Real Green Systems and Storable have harnessed our unique platform, combined with a white glove approach, that allows them to take advantage of embedded payments for growth and innovation. Payrix offers endless possibilities.

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.

UniPay is a commercial, open-source payment gateway that uses modern technology. It can be easily adapted to any business size. We are the payment processing company that provides connectivity, security, and valuable support around the world. Our advanced technology and functionalities allow us to address the unique needs of each customer. This includes merchant onboarding and underwriting, advanced chargeback management, Acquiring Relations development, Payment Facilitator assistance and implementation of EMV terminal solutions. UniPay Platform offers a white label solution that is affordable, as well as an on-premise software license (including source code), and the PayFac Payment Platform that ensures high-quality payment processing.