BoxBilling

BoxBilling is a free, open-source billing automation system built specifically for web hosting companies. It handles recurring invoices, client account management, and payment processing through integrations with major gateways like PayPal, Stripe, and Authorize.Net. The software automates provisioning and suspension of hosting services via modules for cPanel, Plesk, and DirectAdmin. BoxBilling also includes a built-in support ticket system and a client portal where customers can view invoices, pay bills, and manage their services. It runs on PHP and MySQL, making it easy to deploy on standard LAMP stacks. The project was originally developed by BoxBilling Inc. but is now community-maintained on GitHub. While it lacks modern updates and security patches from later forks like FOSSBilling, it still works for basic billing needs. BoxBilling is best suited for small to medium hosting providers who want a self-hosted alternative to proprietary billing platforms without the cost of WHMCS.