FOSSBilling
FOSSBilling is a free, open-source billing and client management system designed for hosting providers, service providers, and freelancers. It provides comprehensive tools for managing clients, products, services, invoices, and payments. FOSSBilling features automated billing cycles, support ticket management, domain registration integration, customizable invoice templates, and multi-currency support. The platform includes a client portal where customers can manage their services, view invoices, and submit support tickets. With support for multiple payment gateways including PayPal, Stripe, and others, FOSSBilling streamlines the entire billing workflow. Perfect for web hosting companies, SaaS providers, and service-based businesses who need professional billing automation without expensive licensing fees.