List of the Top 25 Payment Processing Software 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

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.

We provide a diverse array of choices to ensure that your payment processing is seamless and efficient. Our offerings include not only conventional card reader transactions but also mobile payment solutions, ecommerce capabilities, and fully integrated point-of-sale applications for a comprehensive approach to your payment needs.

OneBill serves as a comprehensive platform for managing subscriptions, billing, and revenue, facilitating the entire journey from customer acquisition to revenue generation. It accommodates various billing models, such as subscription, usage-based, one-time, and recurring billing. The platform boasts open APIs that ensure seamless integration with numerous enterprise systems, including payment processors, carriers, service providers, and accounting software. Covering all essential business functions, OneBill offers features like CPQ, automated order activation, invoicing, revenue reporting, customer subscription oversight, and management of channel partner commissions. Additionally, OneBill stands out as a trusted revenue management solution that collaborates with leading global providers. By utilizing OneBill, businesses of all sizes—from small and medium-sized enterprises to large corporations—can minimize billing inaccuracies, mitigate compliance risks, and enhance operational efficiency significantly. This holistic approach not only streamlines financial processes but also fortifies the foundation for sustainable growth.

Autodeals, Inc. provides a comprehensive cloud-based solution tailored for growth-oriented automobile dealerships across all 50 states. This all-encompassing digital retailing platform features essential tools such as CRM, messaging, deal management, accounting, electronic signatures, LenderHawk contract delivery, a service center, payment processing, and BHPH loan processing. For regional dealerships aspiring to expand geographically, Autodeals offers a systematic approach to growth. Small and medium-sized dealerships aiming for operational excellence and wishing to utilize modern customer communication and digital retailing should consider partnering with Autodeals. BHPH dealerships looking to cut their collection efforts by half will find Autodeals to be an ideal choice. Furthermore, dealerships that want to maintain daily financial accuracy should explore how Autodeals can automate 53% of accounting transactions while providing insight into ongoing operations. Additionally, dealership owners focused on minimizing fraud within their enterprises will appreciate that Autodeals has been developed by dealers with a deep understanding of their unique challenges. This dedication to dealer needs ensures that Autodeals remains a trusted partner in navigating the complexities of the automotive industry.

Are you in search of a dependable and experienced payment orchestration platform? Look no further than PremierCashier, your no-code, all-in-one solution. With just one seamless integration, you can access a multitude of pre-configured payment methods, PSPs, and gateways. The platform supports a variety of devices, currencies, and languages, including popular cryptocurrencies. Benefit from advanced credit card routing that features intelligent failover systems, smart algorithms, and customized rules designed to protect your revenue. Unlock your complete payment potential with our innovative payment orchestration software. To enhance payment conversions across various markets, you can utilize either our professional consultancy services or your existing merchant accounts. Our automated customer profiling ensures secure processing while delivering a VIP experience to your clientele. The unmatched dashboard we provide offers valuable insights to help you optimize conversions effectively. Additionally, our straightforward API can be easily integrated into your CRM or ERP systems, enabling you to go live within hours. Take the initiative to become a payments hero in your organization and reach out to us today for more information. By choosing PremierCashier, you're not just adopting a payment solution; you're investing in a future of seamless financial transactions.

Advanced Payment Processing Gateway Equipped with Enterprise-Level Capabilities and Instantaneous Analytics. This platform ensures seamless transactions while providing businesses with valuable insights in real-time.

Paddle serves as a subscription and billing platform tailored for software and SaaS businesses, addressing the challenges customers face in navigating international growth and resource management. By utilizing Paddle, companies can concentrate on expanding their operations instead of getting bogged down by internal obstacles. The platform provides an extensive array of features, such as streamlined checkout processes for product sales, automated recurring billing, robust fraud prevention measures, and options for manual invoicing. Additionally, Paddle encompasses solutions for sales tax compliance, multi-currency transactions, customer support, comprehensive analytics, and much more, ensuring a well-rounded service for businesses. With its diverse offerings, Paddle empowers businesses to thrive in a competitive marketplace.

Effortlessly streamline your payment processes with Easy Pay Direct, a trusted ally in secure transaction management. Our expertise lies in providing all-encompassing merchant solutions that alleviate your worries about account freezes, suspensions, and surprise fees, allowing you to concentrate on growing your business. Designed to enhance your operational efficiency, Easy Pay Direct focuses on convenience, supported by our dedicated team and cutting-edge technology. We recognize the challenges faced by entrepreneurs and deliver tools that are both powerful and easy to use. Managing credit card transactions should be seamless, which is why our system integrates effortlessly with over 250 online marketplaces, accommodates recurring payments, provides solutions for declined transactions, assists in chargeback disputes, facilitates custom payment URLs, and delivers outstanding personalized support. Our support team is always available to help you via phone, message, or email, ensuring you have the assistance you need when managing your payments. Join a community of successful entrepreneurs like Grant Cardone, Frank Kern, Wes Watson, and Fortune Builders who have chosen Easy Pay Direct for their payment processing solutions, and experience the difference for yourself.

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.

SDK.finance is a fintech platform driven by an API that provides the necessary infrastructure for developing various payment solutions. By utilizing its ledger capabilities, clients of SDK.finance can significantly reduce their development time by at least one year when creating products such as a neobank, a digital wallet application, a payment acceptance system, and more. The diverse range of products that can be developed on the SDK.finance platform includes: - Neobank - Digital wallet - Payment acceptance system - Money transfer application - Marketplace payment solution - Mobile wallet application - General ledger These offerings highlight the platform's versatility in catering to the needs of modern financial technology projects.

Computop offers its clients cutting-edge omnichannel payment processing and fraud prevention solutions tailored for both ecommerce and point-of-sale transactions. With the Computop Paygate, businesses ranging from retailers to service providers and industrial firms can select from an extensive array of over 350 payment options. Operating on a global scale, Computop has established a presence in both Germany and the United States. For more than 25 years, the company has partnered with prominent international brands, including C&A and Fossil. Each year, Computop facilitates transactions totaling USD 33 billion across 127 different currencies, showcasing its significant impact in the payment processing industry. This extensive experience underscores Computop's commitment to delivering reliable and innovative financial solutions to its diverse clientele.

ChargeOn is a 100% Salesforce-native application designed to simplify, automate, and optimize how businesses handle payments — all within Salesforce. It bridges the gap between your Salesforce CRM and 14+ leading payment gateways, giving your team a unified platform to streamline your overall payment management. Why Businesses Need ChargeOn Businesses often faced challenges in receiving Salesforce payments due to manual processes. these processes slowed revenue recognition, resulted in duplication of records and imped customer experiences. ChargeOn eliminates these challenges by providing a seamless payment ecosystem inside Salesforce — ensuring faster collections, improved cash flow, and improved visibility in customer's payment journey. No more switching between systems or chasing failed payments — everything happens in one place, securely and automatically. Key Highlights Instant and Scheduled Payments – collect payments at the right time through multiple payment methods. Automated Recurring Payments & Failed Payment Recovery – don't compromise on your revenue due to missed or failed payments. PCI and DSS Compliant-- ensure security with global payment standards. Secure Tokenization – encrypt customer data during transaction and at rest. Real-Time Reports & Dashboards – get complete visibility into payment information. Multi-Currency and Multi-Gateway Support – scale globally without technical barriers. For a complete list of powerful features, check out our AppExchange listing and see how ChargeOn can transform your payment operations. Empower your Salesforce with ChargeOn — where payments become effortless, automated, and built for growth.

Iris Works serves as a user-friendly management platform designed specifically for photographers. By utilizing its features such as online scheduling, automated communication, invoicing, contract generation, and client questionnaires, photographers can streamline their workflow and enhance organization, ultimately saving valuable time.

Zangerine, part of the Descartes Systems Group, is a comprehensive ecommerce and warehouse management solution built to replace spreadsheets, disjointed integrations, and manual inventory processes with a single unified platform. Specifically designed for small and mid-sized distributors, Zangerine consolidates your inventory, fulfillment, purchasing, and financial workflows into one easy-to-use system. The platform automates everything from barcode-based pick/pack/ship operations to real-time stock tracking, ensuring accuracy and speed across your supply chain. Users can connect multiple online stores—such as Shopify, Amazon, and other marketplaces—to manage product listings, inventory, and orders in real time. QuickBooks integration ensures accounting and inventory data stay perfectly aligned, reducing reconciliation errors and saving hours of manual work. The system also supports kitting and bill of materials (BOM), helping teams manage product bundles and manufacturing components efficiently. With automation at key points, businesses can reduce fulfillment time, eliminate overselling, and boost productivity without increasing headcount. Zangerine’s scalability means it grows alongside your business—adapting to new workflows, warehouses, and integrations as you expand. Its intuitive, web-based interface provides full operational visibility, so you can make smarter, faster decisions from anywhere. By removing the friction of multiple disconnected systems, Zangerine empowers businesses to scale confidently, efficiently, and profitably.

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.

NETePay Hosted is a comprehensive payment solution that facilitates payment processing and token management across various environments, including brick-and-mortar stores, online platforms, mobile apps, and automated systems, all managed through Datacap's centralized portal. With compatibility for nearly every payment processor in North America, Datacap provides an extensive range of plug-and-play EMV-compliant devices sourced from leading manufacturers. Their integrated payment solutions effectively unify in-person, unattended, mobile, and online transactions, guaranteeing a consistent payment experience across all channels. Customers have the flexibility to purchase, configure, and oversee Datacap products at any time via a specialized product portal. In addition, Datacap partners and their merchants enjoy real-time reporting features available around the clock. The platform supports remote adjustments of settings, pad flows, key injection, and other essential functionalities. Moreover, processor-specific encryption methods ensure that card details are kept secure throughout the transaction process, being encrypted at the point of sale and decrypted only at the NETePay Hosted, thus reducing unnecessary data transfer points. By enabling both contact and contactless EMV (chip card) certifications for stationary and mobile devices, the platform significantly decreases the likelihood of card-present fraud, thereby bolstering transaction security. This holistic strategy not only solidifies Datacap's position as a frontrunner in the payment sector but also adapts to the dynamic demands of businesses and their customers. As technology continues to advance, Datacap remains committed to providing innovative solutions that meet the challenges of modern payment processing.

UniCenta's software is designed to save users both time and money on a daily basis. Unlike conventional legacy Point Of Sale systems, uniCenta represents a passionate team focused on developing cutting-edge Point Of Sale solutions. The complete version of uniCenta can be accessed via any smartphone, tablet, or desktop device that supports a browser. It allows you to efficiently send orders to local kitchens, packing displays, or warehouse setups. By utilizing this software, you can enhance customer relationships and strengthen your brand identity. Additionally, it seamlessly integrates in-store prepayments with online purchases. This application not only facilitates transactions but also generates revenue for every sale made, ensuring a profitable experience for users. With uniCenta, businesses can streamline operations while maximizing their earnings potential.

Spoonfed offers a user-friendly, cloud-based platform for managing food orders during meetings and conferences. This global system accommodates both intricate and straightforward contracts while providing enterprise-level reporting capabilities. Customers are empowered with online and mobile-friendly ordering and management features, allowing them to view, edit, repeat, or cancel their orders directly from their profiles without needing to contact the catering team. They can also access allergen and nutritional information, with the added option to include personal notes. The platform facilitates group ordering, enabling guests to submit individual requests within a collective order, and ensures that each meal is packaged separately for safe, contactless pickup or delivery. With a superior ordering experience backed by detailed Back of House reporting, the system equips catering staff with a comprehensive, end-to-end order management solution. Our dedicated teams in the USA and the UK offer prompt support and onboarding assistance to ensure a smooth transition. By minimizing errors and optimizing production data, we help both customers and caterers save time while guaranteeing that orders are accurately fulfilled and dispatched on schedule. Additionally, we have created various Business Use Cases that enhance the efficiency of catering teams, allowing them not only to improve their current operations but also to explore new opportunities for growth. With these innovations, catering teams can adapt to changing demands and elevate their service offerings significantly.

Our credit card processing solution is designed to work seamlessly with a diverse array of terminal and software options, including both mobile and EMV technologies. Regardless of your existing system, we can easily adapt to meet your needs. Our dedicated eCommerce team collaborates with you to identify the ideal online platform that ensures smooth payment processing and keeps you aligned with the latest technological advancements. Setting up an online store and integrating credit card processing is a straightforward process. Our primary objective is to equip you with all the necessary tools and support for running a thriving eCommerce enterprise. We pride ourselves on delivering exceptional service and providing free consultations at any time of the day. The BLUE POS All In-One system offers a comprehensive solution for managing your payment processes, boosting sales, and streamlining your operations right from the start. It features wireless connectivity to EMV/NFC payment devices and comes with optional peripherals, making it an excellent choice for businesses looking to enhance their transaction capabilities. Additionally, our commitment to customer satisfaction ensures that you will always have access to the resources you need to succeed.

Since 2004, IntelliPay has helped thousands of U.S. organizations take control of payment costs. Fully PCI DSS Level 1 certified and hosted on Google Cloud, the platform handles billions in annual transactions across healthcare, government, SaaS, legal, utilities, property management, nonprofit, and service industries. Accept Any Payment, Anywhere: EMV chip, ACH/eCheck, mobile, virtual terminal, IVR, text-to-pay, kiosk, and branded self-service portals — unified under one login and one reporting dashboard. Customers can pay online, in person, over the phone, or via secure text and email pay-now links. Every channel is supported without adding vendors or complexity. Stop Absorbing Processing Fees: Dual pricing, surcharging, and convenience fee programs let businesses pass card costs to the cardholder compliantly, receiving full invoice amounts on every transaction. Prefer the traditional model? That's available too. IntelliPay gives every organization a fee-reducing or fee-eliminating option that fits their customer base and industry requirements. Recurring & Subscription Billing: Automate subscription charges, installment plans, membership dues, and utility collections on any schedule — weekly, monthly, annual, or fully custom. Customers self-enroll in autopay through branded portals, reducing late payments and manual follow-up for your team. Enterprise-Ready Scalability: Multi-location, multi-user management with role-based permissions, automated reconciliation, and audit-ready records. Bulk CSV processing handles thousands of transactions simultaneously — ideal for subscription renewals, tuition billing, and large membership organizations. Connects With Your Stack: Open REST API, native QuickBooks Online sync, white-label options, and prebuilt integrations for Shopify, Magento, BigCommerce, practice management, case management, and custom-built platforms.

We provide a dependable SDK for 1:1 ultrasonic communication and authentication, specifically designed for short-range, contactless interactions between client and host devices, operating effectively within a one-foot range. This SDK is equipped with features for both signal generation and decoding, ensuring compatibility across mobile, desktop, and embedded platforms. By improving the global checkout experience for retailers and transportation companies, we create payment solutions and proximity-driven experiences that enhance the journey for retail customers. Our offerings are also applicable in the realms of automotive, transportation, and ticketing for payment and authentication needs. The technology supports device-agnostic software and transmission, which allows clients the flexibility to manage user experiences, transport layers, and business models according to their unique preferences. Moreover, it accommodates various security measures such as encryption, cryptography, key exchange, and supports full duplex, multi-channel communication, thereby providing the most secure means of transmission possible. By merging short-range capabilities with user experience management, we facilitate faster and more efficient checkout processes, significantly boosting customer satisfaction and overall operational efficiency. Additionally, our technology not only simplifies transactions but also fosters a deeper engagement between consumers and brands. This dual focus on functionality and interaction ultimately creates a more rewarding experience for all parties involved.

Discover effortless global payment solutions with a straightforward flat rate. Start processing within minutes through our all-inclusive platform, tailored to handle payments, invoicing, recurring transactions, and subscriptions, especially for e-commerce businesses. With Z3NPAY, you can take advantage of transparent flat rate pricing for all your payment processing needs. We accommodate a multitude of transaction types, including one-time payments, invoicing, and subscriptions, all at the same rate. Our services also include a user-friendly dashboard, comprehensive reporting, and a variety of additional tools to elevate your payment experience. Opt for Z3NPAY to simplify the management of your financial transactions and ensure seamless operation every step of the way. This platform stands out as the ultimate choice for businesses seeking efficiency and reliability in their payment processes.

Digital Designs' Electronic Payment system allows users to make payments electronically with a secure, one-time-use MasterCard account number. These payments, similar to traditional checks, are allocated for specific vendors and amounts, but they remove the costs and hassles linked to printing and mailing. By choosing electronic vendor payments, you can earn cash back rebates, providing a financial advantage while maintaining your current payment routines. The Electronic Payments platform from Digital Designs is particularly beneficial for businesses aiming to optimize their payment processes. We take pride in tailoring our payment solutions to meet the needs of various industries. Often referred to as Electronic Payments, ePayables, or virtual card payments, this system features cutting-edge technology that seamlessly merges with your existing operations. It serves as a versatile and comprehensive virtual card payment solution, significantly minimizing the dependency on paper workflows, check printing, ACH transfers, and other expensive account management methods. With its remarkable efficiency, this platform not only simplifies the payment process but also contributes positively to your organization's overall financial management and strategy. By implementing such a solution, businesses can focus on growth and innovation rather than administrative tasks.

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