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Top Rated Payment Processing Software with Open source - Page 22

Last updated: May 2026

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604 software options

Appmax logo
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The best for your business.

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Appmax is the ideal online payment solution for digital businesses. With features that maximize results, the app offers several technological resources that increase sales, with a 99% approval rate for credit card transactions.

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Mondu logo
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B2B Payments

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Mondu is driving innovation in B2B payments. Mondu's solution enables merchants and marketplaces to offer their business customers across Europe the most popular B2B payment methods and flexible payment terms in a multi-channel setting, both online and offline.

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myTuitionPortal logo
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Branded Tuition & Donation Portals for Schools w/ Enrollment

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Process your tuition payments and donations securely through your school-branded pay portals using your own processor (Square/Stripe) or ours!

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Q2 Platform logo
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Digital banking platform for banks and credit unions

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Q2 is a cloud-based mobile banking platform, which assists banks and credit unions with customer experience management and compliance. Key features include payment processing, process automation, data mapping, transaction monitoring, data security, fraud mitigation, and analytics.

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ESCROW logo
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Secure ESCROW API Solution for safe & trusted transactions

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AOPAY ESCROW Solution that ensures secure, risk-free transactions for buyers and sellers. Manage payments, release funds, and protect all parties with an automated, transparent, and fully compliant online escrow platform.

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LevelUp logo
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Mobile loyalty & payments

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LevelUp is a software that allows your customers to pay using their smartphones & then captures their information to increase their loyalty using CRM campaigns.

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eFund Connect logo
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Payment processing software for political campaigns

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eFund Connect is a cloud-based payment processing software specifically made for political campaigns.

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Isabel 6 logo
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Transaction management solution for businesses

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Isabel 6 is a cloud-based payments management solution designed to help organizations manage transactions across multiple business accounts. Key features include data sharing, user group management, cash flow tracking, role-based permissions, audit trails, email notifications & reporting.

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DigiPay logo
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Accounts payable and payment processing software

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DigiPay simplifies accounts payable for hotels with automated invoice processing, secure online payments, and seamless workflow integration. The product helps hoteliers manage and pay vendor invoices efficiently by providing stakeholders across all departments the ability to approve invoices and make payments online, all in one secure platform.

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MealMe logo
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MealMe embeds commerce into any website or app

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MealMe's core approach is to offer technology via APIs and SDKs that are easily integrated into any platform. This Data Suite provides point of interest data with depth and quality. MealMe's Ordering Suite gives companies the ability to embed checkout for 100M+ products from 1M+ stores.

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RippleNet logo
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Web-based payment processing and blockchain platform

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RippleNet is a web-based application designed to help financial institutions instantly process customers' global payments using blockchain technology. The application allows professionals to use digital currency to source liquidity during cross-border transactions.

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ThePayStubs logo
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Online paystub creation with auto calculations

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ThePayStubs offers an online paystub generator that creates professional pay stubs in minutes. The platform features automatic tax calculations and deduction processing, eliminating manual work for employers and individuals. Users can generate customizable pay stubs that serve as proof of income for loan applications, apartment rentals, and tax filing purposes.

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CreditorWatch Collect logo

Automate accounts receivable and get paid faster.

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Automate your AR and get your invoices paid faster, save hours in time and say goodbye to mundane manual tasks.

CreditorWatch Collect integrates with ERPs such as Xero, MYOB, Quickbooks Online. Sign-up to a no strings free trial to see how much more effective your AR process could be.

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Project 2 Payment logo
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Simplified Invoicing, Payments, and Scheduling for Pros.

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Project 2 Payment offers fast, secure payment processing built specifically for home service businesses. Accept credit cards, ACH transfers, and digital payments directly from invoices or through a branded payment page—no clunky terminals or third-party apps required.

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Sawyer logo
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Cloud-based registration tool for organizations.

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Sawyer is a cloud-based registration solution that helps manage children's activity businesses. The software serves various business types including camps, after-school programs, small businesses, and franchises. Sawyer offers features to streamline operations and enhance the customer experience on a centralized interface. Its real-time reporting capabilities provide business owners with revenue and customer insights, empowering them to make informed decisions.

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Arbiter Pay logo
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Payment processing platform for K-12

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Arbiter Pay lets K–12 schools send fast, secure digital payments to officials and event workers. Track payouts instantly, automate W-9 and 1099 reporting, and manage every transaction in one place—all fully integrated with your Arbiter scheduling and assigning tools.

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MyndAPX logo
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AP automation software that streamlines invoice processing

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MyndAPX is AP automation software designed for accounts payable processing. With a focus on transforming operations and optimizing collaboration, MyndAPX offers a comprehensive solution to lower costs, ensure compliance, and streamline workflows.

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Biz Core’s Online Payment Processing Solution logo
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Cloud-based payment processing solution

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Biz Core is a cloud-based payment processing solution designed for small and midsize businesses that helps create a seamless payment experience for customers.

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Ivorypay logo
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Stablecoin payments gateway for African businesses

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Ivorypay allows businesses to accept crypto payments, offering checkout, payment links, storefronts, and QR pay. It overcomes foreign exchange limits and scant banking services, enabling global customers to pay with stablecoins. Its APIs facilitate the creation of financial products. Ivorypay converts crypto to local currency, streamlining chargeback fraud. It caters to startups, global brands, fintechs, and betting platforms.

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ValPay logo
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Payment processing solution

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ValPay provides comprehensive payment processing solutions specifically designed for SaaS and IT businesses. The platform enables organizations to integrate payment capabilities directly into existing tools through a PayFac-as-a-Service model. The system offers multi-currency processing support for major currencies including USD, CAD, EUR, GBP, and AUD, allowing businesses to serve global customers with localized payment options.

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Xsolla logo
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Video Game eCommerce and Community Platform

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Xsolla is a video game eCommerce platform that allows video game companies to transact securely, connect to the industry and build gaming communities.

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iugu logo
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Payment processing & financial automation software

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Iugu is a cloud-based financial automation software, which helps businesses in the Brazilian market process online payments, measure revenue growth, and monitor recurring bills. Features include receipt management, credit card processing, fraud detection, invoice scheduling & account reconciliation.

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NMI Payment Gateway logo
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Freedom to Build, Brand, and Scale Payments

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NMI Gateway is a purpose-built, partner-first payments platform that delivers white-label, omnichannel infrastructure. With 150+ processor connections and 235K+ supported devices, it enables flexible, scalable, and branded payment solutions across retail, mobile, and online channels.

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MediPay logo
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Healthcare payment software built for healthcare providers

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MediPay is a healthcare payment software that streamlines transactions and enhances financial processes for healthcare providers.

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Payclix logo
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Payment processing system

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PayClix is a cloud-based payment processing software designed to help businesses streamline payments, create invoices, update accounts payable ledgers, and manage other operations. The platform enables organizations to establish a secure payment processing system to facilitate multiple modes of payment.

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