## Kill Bill

Kill Bill is the Open-Source Billing & Payment Platform.

## Among features

* Subscription engine, with plans management (trial, upgrade, downgrade, etc.), support of add-ons, bundles with multiple subscriptions
* Invoicing engine, supporting different billing alignments, recurring and one-time charges, international tax, metered billing
* Payment state machine, with payment routing capabilities, supporting dozen of gateways
* Plugin architecture, which allows further customization with your own business logic, in Java or Ruby

You can find more information on [killbill.io](http://killbill.io).

## Getting started

All of our documentation can be found at http://docs.killbill.io/ (source in the [killbill-docs](https://github.com/killbill/killbill-docs) repository).

Kill Bill is released under the [Apache license 2.0](http://www.apache.org/licenses/LICENSE-2.0).
