Enterprise Billing on Kill Bill

Get to production faster on top of Kill Bill.

Aviate adds the operational tooling, configuration workflows, and enterprise support teams need to launch and run billing with less custom build-out, while keeping the open-source core and avoiding lock-in.

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Why Aviate

Enterprise billing without the enterprise trade-offs

Aviate gives you the speed of a SaaS platform with the control of open-source infrastructure.

Weeks to Production

Skip 6+ months of infrastructure work. Aviate provides pre-configured cloud infrastructure with auto-scaling, monitoring, and battle-tested deployment templates.

Fixed, Predictable Pricing

Never pay a percentage of your revenue. Aviate uses fixed pricing that stays predictable as you scale, saving companies 60-80% compared to typical billing SaaS vendors.

Zero Vendor Lock-in

Built on 100% open-source Kill Bill core. Your data, your infrastructure, your code. Migrate away at any time with full data portability. No exit fees, no restrictions.

Enterprise-Grade Support

Access to the Kill Bill core engineering team. Support plans, architecture reviews, and migration assistance from the people who built the platform.

Production Monitoring

Pre-configured observability stack with real-time dashboards, alerting, and performance monitoring. Know exactly how your billing infrastructure is performing.

Cloud-Native Infrastructure

Deploy on AWS with auto-scaling, multi-AZ redundancy, and automated backups. Your billing infrastructure runs in your cloud account with full control.

Production-Ready Add-Ons

Everything you need to run a real billing operation

Kill Bill gives you the subscription billing engine. Aviate gives you everything else.

Dynamic Catalog Management

Define and version your product catalog entirely through APIs — no XML files, no redeployments. Create plans, pricing tiers, and usage-based billing meters on the fly. Every plan change is live immediately.

Metering & Usage Billing

Ingest usage events, aggregate them by configurable billing meters (SUM, COUNT, and more), and feed them directly into Kill Bill's invoicing pipeline. Purpose-built for AI token metering, API call counting, storage tracking, or any consumption-based model.

Wallet & Prepaid Credits

Give customers a credit wallet with automatic top-off. Aviate maintains a full double-entry ledger, auto-replenishes balances via configurable triggers, and applies credits at invoice time — all with distributed locking for safe multi-node operation.

Coupons & Discounts

Create coupons with percentage or fixed-amount discounts, plan-level filtering, and max-use enforcement. Aviate intercepts Kill Bill's entitlement and invoice pipelines to validate coupon eligibility and apply adjustments automatically.

Tax Computation

Configure tax codes per product with date-ranged rates, country-level resolution, and timezone-aware evaluation. Aviate injects tax line items into Kill Bill invoices with configurable decimal precision — no external tax provider required for straightforward tax regimes.

Custom Invoice Sequencing

Generate human-readable, sequential invoice numbers with configurable prefix, suffix, start value, and per-account or global scope. Replaces Kill Bill's default UUID-based invoice identifiers.

Aviate turns Kill Bill from a billing engine into an enterprise-ready billing platform — catalog management, metering, wallets, coupons, tax, and custom invoicing, all in a single plugin with a modern UI.

Comparison

Kill Bill OSS vs. Aviate

Both paths lead to production. Aviate gets you there faster.

Capability	Kill Bill OSS	Aviate
Billing Engine	✓ Full	✓ Full
Payment Orchestration	✓ Full	✓ Full
Admin UI (Kaui)	✓ Full	✓ Enhanced
Dynamic Catalog Management	XML-based	✓ API-driven
Metering & Usage Billing	DIY	✓ Built-in
Wallet & Prepaid Credits	DIY	✓ Built-in
Coupons & Discounts	DIY	✓ Built-in
Tax Computation	DIY / 3rd-party	✓ Built-in
Invoice Sequencing	UUID-based	✓ Sequential
Cloud Infrastructure	Self-managed	Pre-configured & managed
Auto-scaling	DIY	✓ Built-in
Monitoring & Alerting	DIY	✓ Pre-configured
Time to Production	3-6+ months	Weeks
Enterprise Support	Community	Available (plans for every stage)
Pricing Model	Free (OSS)	Fixed (never % of revenue)
Vendor Lock-in	✓ None	✓ None

Architecture

Open-source core. Enterprise shell.

Aviate wraps Kill Bill's open-source billing engine with a production-grade operational layer. The core remains 100% open-source. Aviate adds the infrastructure, tooling, and support that enterprise teams need to ship fast.

Application Layer: Kill Bill billing engine + Kaui admin console

Aviate Plugins: Catalog, metering, wallets, coupons, tax, invoice sequencing

Infrastructure Layer: Auto-scaling, load balancing, database clustering

Observability Layer: Monitoring, alerting, dashboards, logging

Support Layer: Access to the core Kill Bill team