✓ 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.

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.

Try Sandbox

Finance & Ops Teams

Accurate revenue recognition, audit trails, compliance.

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Growth-Stage Companies

No % fees. Predictable costs as you scale.

See Pricing

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 support.

Start Open Source

Aviate - managed

Fixed price

Cloud-hosted, auto-scaling, monitoring included. Catalog API, Metering, Wallet out of the box. Fixed price.

Try Sandbox

Enterprise Accelerator

Meet Aviate: production-ready in weeks, not months

Aviate is the proprietary enterprise accelerator built on top of Kill Bill's open-source core. It provides production-grade infrastructure, pre-built integrations, and operational tooling so your team ships billing faster with zero vendor lock-in.

Pre-configured cloud infrastructure with auto-scaling and monitoring

Fixed pricing, never a percentage of your revenue

100% open-source core: migrate away any time with full data portability

Learn about Aviate

Why teams choose Aviate

Time to production

6+ months DIY → Weeks with Aviate

Infrastructure

Build from scratch → Production-ready

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.

View Subscription Billing

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.

View Payment Platform

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.

View Kaui

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 build your own with the open plugin framework.