Subscription billing and payments infrastructure you own and control
Manage subscriptions, generate invoices, and process payments with a flexible, extensible platform built for companies that need full control of their billing stack.
Multi-Tenant
Plugin Extensible
Open Source
Cloud Native
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What is Kill Bill?
Understand how Kill Bill works and how it compares to SaaS billing platforms.
Getting Started
Install Kill Bill locally with Docker and explore the core features in minutes.
API Reference
REST API documentation with code snippets for Java, Ruby, Python, and more.
Kaui Admin UI
Manage accounts, subscriptions, and invoices through the web admin interface.
Subscription Billing
Catalog, plans, phases, trials, add-ons, and billing alignment explained.
Payment Processing
Payment methods, gateways, retries, refunds, and payment plugin architecture.