Kill Bill
Open-source programmable billing and payments platform for subscriptions
5.7k stars 956 forks last commit first released Apache-2.0
Actively maintained
Last commit 20 Aug 2026.
Kill Bill is an open-source, programmable platform for building custom billing workflows. It is modular and self-hosted, designed to handle complex subscription models with high scalability.
Key Features
- Open-source, modular architecture with a plugin framework to extend behavior
- Real-time analytics and financial reporting out of the box
- Kaui admin user interface for managing subscriptions and payments
- Headless, API-driven backend with plugins enabling integrations to payment gateways
- On-premises or cloud deployment, giving you ownership of your billing data
Use Cases
- SaaS-style subscription management with complex pricing (recurring, usage-based)
- Custom plugin-driven integrations with ERP, tax, CRM and other third-party systems
- Private data-center or cloud deployments with multi-tenant capabilities
Limitations and Considerations
CONCLUSION Kill Bill is a mature, open-source billing platform designed to be customized and hosted by you, with strong support for subscriptions, payments, and extensive plugin extensibility. It emphasizes data ownership, flexibility, and self-hosted deployment options to suit enterprise needs.
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