Best Self Hosted Alternatives to FastSpring

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.