List of the Top 4 Payment Facilitation (PayFac) Platforms for Linux 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

Payrix is dedicated to becoming the global frontrunner in embedded payment solutions tailored for specialized business software. Our aim is to empower our clients with enhanced flexibility, confidence, and a reliable system that reduces obstacles, creates fresh revenue streams, and simplifies experiences for their customers. Notable clients like Real Green Systems and Storable have leveraged our distinct platform, paired with a personalized service approach, enabling them to utilize embedded payments for their expansion and creative advancement. With Payrix, the opportunities are limitless and continually evolving to meet the needs of our partners.

CARDZ3N facilitates international transactions for various payment methods, including credit cards, ACH, SEPA, and over 140 cryptocurrencies. The platform specializes in handling payments for high-risk sectors and emerging markets, covering areas such as CBD, cryptocurrency exchanges, gambling, and travel, among others. Additionally, CARDZ3N provides a competitive Stripe Alternative, with fees beginning at 2.25% for non-profits and 2.75% plus $0.25 for e-commerce businesses. Beyond these services, CARDZ3N also presents a range of payment solutions, including options for ACH, payroll and HR services, employee benefits, and business capital support. At CARDZ3N, our goal is to address the critical challenges faced by our diverse clientele, regardless of their size. It is our distinctive methodology that sets us apart and defines our unique value proposition in the market.

UniPay is a versatile, open-source payment gateway that leverages cutting-edge technology to cater to businesses of all sizes. As a global payment processing provider, we offer robust connectivity, enhanced security, and dedicated support to our clients. Our innovative features are designed to meet the specific demands of each customer, encompassing services such as merchant onboarding and underwriting, effective chargeback management, development of Acquiring Relations, assistance for Payment Facilitators, and the implementation of EMV terminal solutions. The UniPay Platform also presents an economical white label option, in addition to an on-premise software license that includes the source code, along with the PayFac Payment Platform, which guarantees exceptional quality in payment processing. With UniPay, businesses can seamlessly integrate a reliable payment solution that evolves with their needs.