Best Payment Processing Software 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

Don't let fraud erode your bottom line, damage your reputation, or stall your growth. FraudNet's AI-driven platform empowers enterprises to stay ahead of threats, streamline compliance, and manage risk at scale—all in real-time. While fraudsters evolve tactics, our platform detects tomorrow's threats, delivering risk assessments through insights from billions of analyzed transactions. Imagine transforming your fraud prevention with a single, robust platform: comprehensive screening for smoother onboarding and reduced risk exposure, continuous monitoring to proactively identify and block new threats, and precision fraud detection across channels and payment types with real-time, AI-powered risk scoring. Our proprietary machine learning models continuously learn and improve, identifying patterns invisible to traditional systems. Paired with our Data Hub of dozens of third-party data integrations, you'll gain unprecedented fraud and risk protection while slashing false positives and eliminating operational inefficiencies. The impact is undeniable. Leading payment companies, financial institutions, innovative fintechs, and commerce brands trust our AI-powered solutions worldwide, and they're seeing dramatic results: 80% reduction in fraud losses and 97% fewer false positives. With our flexible no-code/low-code architecture, you can scale effortlessly as you grow. Why settle for outdated fraud and risk management systems when you could be building resilience for future opportunities? See the Fraud.Net difference for yourself. Request your personalized demo today and discover how we can help you strengthen your business against threats while empowering growth.

Autodeals, Inc. offers growth minded Automobile Dealerships a cloud solution covering all 50 states. The full digital retailing solution includes a CRM, Messaging, Deal Management, Accounting, Electronic signatures, LenderHawk Contract Delivery, a Service Center, Payment Processing and BHPH Loan Processing. Regional dealerships interested in geographic growth can systematically expand with Autodeals. Small and Medium dealerships who are interested in being operationally excellent and leverage modern customer messaging and digital retailing should choose Autodeals. BHPH dealerships interested in reducing collection efforts by 50% should select Autodeals. Dealerships interested in balancing their books on a daily basis should see how Autodeals automates 53% of your accounting transactions and provides visibility to current operations. Dealership owners interested in reducing Fraud in their business? See how Autodeals has been built for Dealers by Dealers.

Are you looking for a seasoned and reliable payment orchestration platform? PremierCashier is your no-code, turnkey solution. Through one simple solution, you can connect with hundreds of pre-built payment methods, PSPs, and gateways. Accepted devices, currencies, and languages include popular cryptos. Strong credit card routing with intelligent failover, clever algorithms, and rules to ensure you don't lose money. Reach your full payment potential with our payment orchestration software. To maximize your payment conversions in each geo market, you can use either our payment consultancy or your existing merchant accounts. Automated customer profiling allows you to keep your processing secure while providing your customers with a VIP experience. Our dashboard is unrivaled in terms of providing actionable data to maximize conversions. Our API is very simple to incorporate into CRM/ERP integrations so you can be up and running in hours. Become your corporate hero in payments and contact us today.

Our wide range of options will help you to process payments smoothly. We offer a wide range of payment options, including traditional card reader payments as well as mobile payments, ecommerce and fully integrated POS applications.

OneBill is an integrated subscription management, billing and revenue management platform that powers customer lead-to-revenue generation. OneBill supports all types billing models, including subscription billing, usage-based billing, one-time billing, and subscription billing. Open APIs make OneBill easy to integrate with other enterprise systems, such as payment gateways, carriers & service providers and accounting & admin. The platform covers all aspects a business, including CPQ, automated order activation, billing & Invoicing, billing & invoicing, revenue reporting, customer subscription management and channel partner commission management. OneBill is a revenue management and billing solution that integrates with the most trusted solutions in the world. It has helped SMBs, SMEs and large enterprises reduce billing errors, compliance risks, and drive greater efficiency.

Cutting-edge Payment Processing Gateway with Enterprise Features & Real-Time Metrics

Paddle is a subscription commerce platform and billing platform for Software- and SaaS-based companies. It is more difficult than ever for customers to keep up, to find international growth opportunities, or to effectively manage your internal resources. Paddle allows you to focus on scaling your business, rather than spending time fixing internal roadblocks. Paddle offers a complete suite of tools, including optimized checkout to sell your product, recurring billing, fraud detection and manual invoicing. It also includes sales taxes, global currencies, customer service, analytics, and more.

Streamline Payments effortlessly with Easy Pay Direct, your reliable partner in secure transaction processing. We specialize in comprehensive merchant solutions, enabling you to minimize concerns about account suspensions, freezes, or unexpected fees, allowing you to dedicate more attention to expanding your enterprise. Conceived with the goal of simplifying your operations, Easy Pay Direct prioritizes convenience through our dedicated team and advanced technology. We understand the demands of entrepreneurs and provide tools that are not only effective but straightforward and user-friendly. Handling credit card transactions shouldn't add to your workload. That's why we ensure our system integrates smoothly with over 250 online marketplaces, supports recurring payments, offers solutions for declined transactions, oversees chargeback disputes, creates bespoke payment URLs, and delivers exceptional, personalized support. Our support team is always ready to assist via phone, message, or email, ensuring you're never alone in managing your payments. Discover why leading entrepreneurs, including Grant Cardone, Frank Kern, Wes Watson, and Fortune Builders, choose Easy Pay Direct for their payment processing needs.

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.

SDK.finance is an API-driven fintech platform that serves as a foundation for building a payment product on top. Using its ledger layer allows SDK.finance customers to save at least 1 year of active development for building a neobank, digital wallet app, payment acceptance business, marketplace payment solution etc. What products can be built on top of SDK.finance platform? Neobank Digital wallet Payment acceptance system Money transfer app Marketplace payment solution Mobile wallet app General ledger

Computop provides its customers with local and innovative omnichannel payment processing and fraud protection solutions for ecommerce and POS. Computop Paygate allows retailers, service providers, and industrial enterprises to choose from more than 350 payment methods. Computop is a global player, with locations in Germany and the USA. It has been serving large international companies, such as C&A and Fossil for over 25 years. Computop processes transactions worth USD 33 billion, in 127 currencies.

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 is an intuitive management system for photographers. Save time and get organized with online booking, automated emails, invoicing, contracts, and questionnaires.

Descartes Zangerine is a scalable, cloud-based solution built to help small and medium-sized distributors manage their entire ecommerce and warehouse operations from a single platform. It eliminates reliance on spreadsheets and disconnected systems by combining inventory control, order fulfillment, purchasing, barcode scanning, and kitting/BOM management into one cohesive workflow. Whether you sell on Shopify, Amazon, or your own site, Zangerine ensures real-time synchronization across every sales channel. With built-in QuickBooks and third-party integrations, your accounting, purchasing, and logistics all work together seamlessly. Zangerine’s automation dramatically reduces fulfillment time, prevents stockouts, and improves order accuracy—helping you deliver better customer experiences. The platform is tailored for flexibility, adapting to your unique business processes and scaling effortlessly as your company grows. Its intuitive dashboard gives you instant visibility into key metrics, streamlining decision-making and cutting down on manual tasks. For distributors ready to modernize, Zangerine transforms the complexity of ecommerce into a single, unified growth engine.

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.

NETePay Hosted serves as a robust payments solution that integrates payment processing and token management across physical stores, online platforms, mobile applications, and unattended systems, all centralized through Datacap's portal. With support for nearly every payment processor in North America, Datacap offers a wide variety of plug-and-play EMV-compliant devices from top manufacturers. Their omnichannel payment solutions seamlessly blend in-person, unattended, mobile, and online transactions, ensuring a cohesive payment experience no matter the channel. Users can purchase, set up, and manage Datacap products around the clock through the dedicated product portal. Additionally, Datacap partners and their merchants benefit from real-time reporting capabilities available 24/7. The platform allows for remote configuration of settings, pad flows, key injection, and various other functionalities. Furthermore, processor-specific encryption techniques guarantee that card information remains secure during the transaction, being encrypted at the point of sale and only decrypted at the NETePay Hosted, eliminating unnecessary data transfer points. By implementing contact and contactless EMV (chip card) certifications for both fixed and mobile devices, the risk of card-present fraud is significantly minimized, enhancing overall transaction security. This comprehensive approach positions Datacap as a leader in the payments industry, catering to the evolving needs of businesses and consumers alike.

UniCenta's software helps people save time and money every day. uniCenta does not produce the typical legacy Point Of Sale software. We are a small group of people dedicated to creating innovative Point Of Sale applications. You can run the full version of uniCenta on any smartphone, tablet, or countertop machine using a browser. Send orders to any local kitchen, packing display or warehouse display. Strengthen the relationship with your customers and reinforce your brand. Mix in-store prepayments and online store purchases. This app will pay you for each transaction and earn you money.

Spoonfed is a cloud-based, intuitive solution for food order management in meetings and conferences. Global system that can be configured for complex and simple contracts. Enterprise reporting. Empower your customers through online, mobile responsive, ordering and order management; View/edit/repeat/cancel order functionality within customer's profile - no need to call the catering team; Allergens/nutritional information viewable - with option to add notes. Group ordering allows guests to make individual requests as part of a larger order. Each meal is wrapped separately for contactless pickup/delivery. Our 'best-in-class' ordering experience is supported by Back of House reporting and a comprehensive, end-to–end order management system for catering staff. Teams in the USA and UK provide highly responsive support and onboarding. Reduce mistakes and save time for customers and caterers with streamlined production data. This ensures accurate orders are sent out on time. We have developed a number of Business Use Cases which enables catering teams to do what they already do, but better AND also be in the position to extend their reach and take up new opportunities.

Canopus connects to a wide range of digital banking and payment functions. Canopus is your one-stop shop solution for Fintech. It includes software, open API, and connections to the most important partners such as banks, forex, card issuers, acquirers, and acquirers. We offer the most common functionalities for any Payment Service Provider, regardless of size: customer onboarding, AML, SWIFT/SEPA payment, forex, payments to cards, card issuing and payment acquiring, and crypto payments.

Our credit card processing solution integrates with a wide range of terminal and software options, including mobile and EMV solutions. No matter what your current system is, we can accommodate it. Our eCommerce team will work with you to find the right online platform for your business that allows payments to be processed seamlessly and keeps you up to date with technology. It's easy to create an online store and add credit card processing. Our number one goal is to provide you with all the tools and support that you need to run a successful eCommerce business. We offer unmatched service and free consultation at all times of the day. BLUE POS All In-One provides everything you need to manage your payments, increase sales, and optimize your operations straight out of the box. It can be connected wirelessly to an EMV/NFC payment device, and has optional peripherals. This makes it a great choice.

We offer a reliable, short-range 1:1 ultrasonic communication and authentication SDK that allows for contactless transactions between a client and host device within a distance of one foot. Our SDK includes capabilities for signal generation and decoding, and is compatible with mobile, desktop, and embedded systems. By enhancing the checkout process globally for retailers and transportation enterprises, we provide payment and proximity-based experiences that enrich the retail customer journey. Our solutions also extend to payment and authentication in automotive, transportation, and ticketing sectors. We support device-agnostic transmission and software, granting clients control over the user experience, transport layer, and business model. With the ability to accommodate encryption, cryptography, key exchange, and full duplex, multi-channel features, we facilitate the most secure transmission methods available. By combining our short range with user experience control, we enable quicker and more seamless checkout processes, ultimately elevating customer satisfaction and operational efficiency. Our technology not only streamlines transactions but also enhances the overall engagement between customers and brands.

Experience seamless flat rate global payment solutions. Begin your processing in just a few minutes. Our comprehensive platform caters to payments, invoicing, recurring transactions, and subscriptions, specifically designed for e-commerce needs. With Z3NPAY, enjoy straightforward flat rate pricing for all your payment processing requirements. We support a variety of transactions, including single payments, invoicing, and subscriptions, all for the same rate. Additionally, our services feature an intuitive dashboard, detailed reporting, and various other tools to enhance your payment experience. Choose Z3NPAY for an all-in-one solution to manage your financial transactions effortlessly.

The Electronic Payment system from Digital Designs enables you to send payments electronically through a secure, one-time-use MasterCard account number. Similar to traditional checks, these payments are designated for a specific vendor and amount, but they eliminate the expenses and inconveniences associated with printing and mailing. By opting for electronic vendor payments, you can actually earn cash back rebates, meaning you benefit financially while making the same payments you currently do! Digital Designs’ Electronic Payments platform is ideally suited for businesses looking to streamline their payment processes. We take great pride in customizing our payment solutions to accommodate a diverse range of industries. Known as Electronic Payments, ePayables, or virtual card payments, this system boasts advanced technology that integrates effortlessly with your operations. It serves as a comprehensive and adaptable virtual card payment solution, significantly reducing the reliance on paper workflows, check printing, ACH transfers, and other costly account management processes. With its efficiency, this platform not only simplifies payments but also enhances your business's overall financial management.

NMI Gateway is a purpose-built, partner-first payments platform that delivers white-label, omnichannel infrastructure across every merchant environment. Designed forISOs, banks, financial institutions, ISVs, software companies and SaaS platforms, it enables secure, scalable, and customizable payment acceptance. NMI does not sell to merchants—we powers 4,000+ partners serving over 1 million businesses worldwide. Unlike gateways tied to a single processor, NMI gives partners full control over branding, pricing, and merchant relationships. With 150+ processor connections, 125+ shopping cart integrations, and support for 235,000+ connected payment devices, it provides unmatched flexibility across retail, in-app, mobile, e-commerce, and unattended environments. Developers can integrate through robust APIs and SDKs, building custom routing strategies, dynamic payment flows, and multi-MID configurations without vendor lock-in. Value-added tools like Shopify integration for embedded commerce and Bill Connect for syncing with accounting platforms such as QuickBooks and Xero extend functionality. Additional module including network tokenization, recurring billing, and fraud prevention, helping partners reduce churn, boost approval rates, and enhance payment security. Processing over 5.8 billion transactions annually and powering $440+ billion in payment volume, NMI Gateway transforms payments from a backend utility into a customizable, revenue-generating platform that empowers partners to build differentiated, long-term merchant relationships.