FOSSBilling is a free, open-source billing and client management system. It helps online service businesses automate invoicing, payments, and client communication. While it’s popular with web hosting providers, it also works well for software licensing, digital downloads, and subscription services.

• Billing & Invoicing: automated invoices, reminders, and basic reporting.
• Client Management: a central place for client data and communication.
• Extensibility: extension-friendly architecture for integrations and custom features.
• Payments: support for multiple gateways.
• Translations: community-powered, multi-language interface.
• Responsive UI: usable on desktop and mobile.
• Security-focused: built with security best practices in mind.

FOSSBilling runs on standard LAMP/LEMP stacks. For the latest system requirements (PHP version, extensions, database, etc.), see the official requirements.

Follow the step-by-step Getting Started guide.

Just exploring? Try the public demo.

We welcome contributions from the community! We’re actively modernizing the codebase and there’s plenty to do.

• Read the contributor guide.
• Pick an item from the open issues.
• Open a PR when you’re ready.

If you prefer to start a conversation first, drop by the forum or say hello on Discord.

Not a developer? Starring the repository helps others discover the project.

FOSSBilling is released under the Apache 2.0 license. See LICENSE for details.

• Website: https://www.fossbilling.org/
• Documentation: https://docs.fossbilling.org/
• Discord: https://fossbilling.org/discord
• Twitter/X: https://twitter.com/FOSSBilling