FOSSBilling

FOSSBilling is a self‑hosted, open‑source system that combines client management, invoicing and service provisioning for online service providers. It automates invoice creation, payment reminders and basic reporting, while offering a built‑in helpdesk for ticket handling. The platform supports multiple payment gateways, multi‑currency invoices with automatic exchange‑rate updates, and a responsive UI that works on desktop and mobile devices.

The software integrates directly with popular control panels such as WHM, CWP, cPanel and HestiaCP, enabling automatic creation of hosting accounts. It also includes domain management features—registration, transfer and registrar support—and an extensible architecture that lets developers add themes, modules, payment gateways, server managers and registrar integrations through a documented API and event hooks.

Targeted at web‑hosting businesses, software licensing, digital‑download and subscription services, FOSSBilling runs on standard LAMP/LEMP stacks and is distributed under the Apache 2.0 license. Its community‑driven development provides multilingual translations, security‑focused defaults and a public demo for quick evaluation.