Top 7 Payment Processing Software Companies With $5M–$10M Revenue (November 2026)

San Francisco, California, United States

Payment operations tools for money movement.

Singapore, Singapore

Payments infrastructure for businesses scaling in APAC

Wilmington, DE, United States

EPX provides merchants accounts and a straight-through, fully integrated, secure payment processing platform, and acts as a payment gateway and acquirer. EPX provides traditional POS, Internet-related, and self-service (kiosks, parking meters, etc.) credit card processing, debit card processing, and ACH processing products and services to businesses, public utilities, merchants, retailers, e-tailers, merchant acquiring banks, Independent Sales Organizations (ISOs), and third-party processors in the United States, Canada, Europe, the Middle East, Latin America and the Caribbean. Your business, whether large or small, can securely get a merchant account and accept credit cards, debit cards, and ACH checks using EPX solutions. Additionally, EPX hosted solutions enable your organization to facilitate PCI compliance by outsourcing your payment processing needs.

Doncaster, South Yorkshire, United Kingdom

Key IVR are a privately owned business offering automated payment services in the UK and internationally through Europe and into the United States. We are a customer-service focused organisation and take care to manage and meet our client’s expectations. Hosted in leading data centres and processing over £1.7bn per annum, our state-of-the-art payment suite is robust, reliable and secure – certified PCI-DSS v4.0 Level 1 by our QSA partner LRQA Nettitude. Available in 14 languages across 11 currencies, our solutions are recommended by the Chartered Institute of Credit Management, worldwide payment gateways and PCI-DSS QSAs. We are also registered with Visa Europe as a QSA assessed service and adhere to the EU’s General Data Protection Regulation (GDPR). We are proud to have achieved our success through referral and recommendations. Our mission is to provide high-volume automated payment collections through great software and delivering excellent customer service. We aim to be the provider of choice for companies wanting to deliver high-quality payment collection systems to their clients and customers.

Tampa, Florida, United States

National Payment Corporation is the nation's largest independent provider of payroll distribution solutions for all sizes of businesses. In business since 1991, National Payment satisfies the payroll distribution needs of thousands of customers in most industries, and in every state. National Payment's unique payroll distribution process has many checks and balances to insure that your funds are safe and secure; so that your employees are paid accurately and on-time, every time. Security is our number one priority! Trusting your Direct Deposit payroll, and your electronic pay stub delivery to National Payment is a safe decision. Bonded through two nationally known insurance carriers, National Payment has never lost a penny of our customer's money. And we transmit over 5 billion dollars a year on behalf of our customers.

Woerden, Utrecht, Netherlands

In a customer-centric world, payments don’t belong in the back office—they belong in your CRM. FinDock brings payments into Salesforce, transforming payments into a seamless, strategic interaction that enhances both customer satisfaction and operational efficiency. By putting payments at the heart of Salesforce’s Customer 360, we empower organizations to deliver personalized, frictionless payment experiences that match the unique preferences of their customers. With FinDock, you can offer every payment method your customers need, while centralizing all processes—both online and traditional—within a single, streamlined architecture. Ready to unlock the full potential of Salesforce? Discover how FinDock can transform your payment processes and elevate your entire organization to a whole new level. Start making informed, data-driven decisions that drive revenue growth and reduce costs.

St. Paul, Minnesota, United States

Vertical SaaS Payments Infrastructure & Strategy