Deploy Paymenter on your own server.

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.

Invoice Ninja is a powerful, open-source platform for managing invoices, quotes, and payments, specifically designed for freelancers and small businesses. It allows you to automate billing, track payments, and manage expenses effortlessly. With a user-friendly interface and robust feature set, Invoice Ninja supports multi-currency, recurring billing, and various payment gateways, providing a comprehensive invoicing solution.

Lago is an open-source metered billing and usage-based pricing platform that helps businesses implement complex pricing models with precision and transparency. Built for modern SaaS companies, Lago provides real-time usage tracking, flexible pricing configurations, automated invoicing, and comprehensive billing analytics. Perfect for businesses that need to implement usage-based pricing, hybrid pricing models, or complex billing scenarios with features like prepaid credits, graduated pricing, and multi-dimensional metering.