✓ Trusted by F500 companies processing billions in revenue

Billing infrastructure that scales with you at a fixed price, not a percentage of your revenue.

Deploy in your own infrastructure. Migrate without disruption. No vendor lock-in, ever.

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15+ years in production Billions processed 100K+ subscriptions

Who This Is For

Trusted by growth-stage startups and Fortune 500 companies

Kill Bill is proven at scale, handling billions in recurring revenue across B2B, B2C, and hybrid business models. Deploy in your infrastructure with predictable, fixed pricing.

Engineering Leaders

Full control. Deploy in your infra. Extend without waiting on vendor roadmaps.

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Finance & Ops Teams

Accurate invoicing, audit logs and billing data in your own database.

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Growth-Stage Companies

No % fees. Predictable costs as you scale.

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Two ways to start

Both built on 100% open-source Kill Bill core

Open Source

Free

Self-hosted. Deploy on your infra via Docker or AWS. Full access to source code and plugins. Community help, no support or SLA.

Start Open Source

Aviate

Fixed price

Runs in your own infrastructure, next to Kill Bill. Catalog API, Metering, Wallet and Premium support. Fixed price.

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Enterprise Offering

Meet Aviate: ready-made modules instead of in-house builds

Aviate is the enterprise offering built on Kill Bill's open-source core. It runs in your own infrastructure and adds pre-built modules, operational tooling and Premium support, so your team ships billing faster with no vendor lock-in.

Runs in your cloud account or data center, with Aviate Health for monitoring

Fixed pricing, never a percentage of your revenue

Your data stays in your own database. If you stop Aviate at the end of your term, Kill Bill keeps running under Apache 2.0.

Learn about Aviate

Why teams choose Aviate

Operations tooling

Build from scratch → Control Plane and Health

Vendor lock-in

Typical SaaS risk → Zero lock-in

Pricing model

% of revenue → Fixed cost

Product

Battle-tested at scale. Extensible by design. Yours to control.

Whether you're billing for SaaS subscriptions, usage-based AI tokens, multi-tenant white-label platforms with thousands of tenants, or complex prepaid/postpaid models, Kill Bill provides battle-tested primitives proven at global scale.

Kill Bill can fulfill the billing and payment needs of nearly any online business:

Scale your billing infrastructure without scaling vendor bills: predictable costs as you grow

Access real-time analytics and financial reports

Own your data and destiny: in-house deployment with full auditability and zero vendor lock-in

Subscription Billing

Experience unrivalled versatility with Kill Bill Subscription Billing, giving you complete control over subscriptions and pricing models, including usage-based billing, to support your unique business needs.

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Payment Platform

Take control of your payments strategy with Kill Bill, easily integrating with payment gateways, issuing banks, and fraud tools via its robust partner ecosystem and extensible plugin interface.

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Admin User Interface

Kaui is a robust, user-friendly back-office web-based UI for customer success, finance, RevOps, and developer teams to easily configure price books and manage subscriptions & payments.

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Ecosystem

Connect to the tools your business already uses

Kill Bill's plugin architecture integrates with leading payment gateways, tax engines, and cloud infrastructure, or you can build your own with the open plugin framework.