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  <img src="https://github.com/killbill/killbill-docs/raw/v3-0.19/userguide/assets/img/logo.png" alt="Kill Bill logo" style="max-width:100%;">
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# Kill Bill

Kill Bill is the open-source subscription billing and payments 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 [docs.killbill.io](http://docs.killbill.io) (sources in the [killbill/killbill-docs](https://github.com/killbill/killbill-docs) repository).

## License

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