S1 Corporation
Software DevelopmentUnited States201-500 Employees
S1 Corporation is a United States-based software development firm with more than two decades of experience. It serves banks, retailers, and processors with software solutions for payments, online banking, branch banking, and lending, used by more than 3,000 organizations worldwide. The company's payments offerings include ATM-driven payments, card management, merchant acquiring and retail payments. It maintains local development, delivery, and support capabilities across regions worldwide to serve its customer base.