About Kill Bill
Kill Bill is an open source billing and payments platform for subscription businesses. You can run it on your own infrastructure rather than handing a share of your revenue to a hosted billing service.
What it does
Kill Bill covers the core jobs of recurring billing. It manages subscriptions, price plans and promotions, invoices and tax rules. It can also meter usage and track prepaid balances. Payment providers are connected through plugins, and the Kaui admin interface lets operators manage subscriptions without writing code.
Key features
- Subscription management with plans and tiers
- Usage metering and prepaid wallets
- Tax rules, invoicing and audit trails
- Payment provider plugins
- Kaui admin interface for operators
Who it's for
Kill Bill suits engineering-led teams that want full control over billing data and logic. It is aimed at SaaS companies, usage-based products, marketplaces and fintech businesses with custom billing needs. Teams without developers may find a hosted product easier to start with.
Pricing and good to know
The code is published under the Apache-2.0 license, so the software is free to use and change. Running it means hosting, maintaining and operating the system yourself. Docker setup is offered for a quick start, and the docs and API reference are public. A hosted version is managed with a partner, ChaChing, and enterprise support and plans are sold separately.
Highlights
- Manage subscriptions, plans and pricing tiers
- Meter usage and track prepaid wallets
- Add payment providers through plugins
- Use the Kaui admin interface to manage accounts
- Deploy in your own infrastructure with Docker
