Kill Bill
Free and open-source (self-hosted, no transaction fees)Open-source billing platform with complete control and no vendor lock-in.
Why founders use Kill Bill
The Good
The Bad
The Verdict
Kill Bill is a powerful, open-source subscription billing and payment platform trusted by enterprises and indie developers alike. As fully open-source software (Apache 2.0 license), it provides unmatched transparency and control—you own your billing data and can customize every aspect. The platform handles subscription management, invoicing, payment processing, analytics, and reporting without vendor lock-in.\n\nKill Bill is ideal for technical founders who want to self-host their billing infrastructure and customize it deeply. It integrates with major payment gateways (Stripe, Adyen, PayPal, Braintree) and supports complex pricing models including usage-based, tiered, and hybrid billing. The trade-off is operational complexity: you manage hosting, updates, and maintenance. Best for product teams with DevOps resources but limited budgets.