Constellation Payments, formerly known as CSI Paysystems, is a payment service provider that specializes in delivering secure and integrated payment solutions for software partners and independent software vendors (ISVs). As part of the Constellation Software Inc. (CSI) family, the company offers a feature-rich payment gateway, a comprehensive merchant boarding and management portal, and detailed reporting tools. Their primary mission is to simplify payment acceptance for their partners, enabling them to monetize payments, reduce business churn, and enhance their software offerings with seamless payment processing capabilities.

Founded in

United States