Kill Bill OverviewOpen-Source Subscription Billing & Payments Platform
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About Our Open-Source Software
Kill Bill uses the Apache Version 2.0 license, one of several licenses approved by the Open Source Initiative.
This means you can freely use, copy, modify, and share Kill Bill.
(Yes, “freely” really does mean that Kill Bill is free!)
To learn more about open-source software, see our OSS Learning page.
We refer to Kill Bill as a platform because of its extensibility. Kill Bill is comprised of…
Kill Bill runs on your back-end. Customers don’t interact with Kill Bill directly. Instead, their activities on your website (like purchasing a year’s subscription to your services) triggers API calls to process orders, subscriptions, renewals, and other customer activities. You design and build the API calls that communicate with the Kill Bill platform.
The database manages all the states associated with the subscriptions, invoices, payments, and so forth.
Kaui is an online user interface that lets your back-office people (for example, Finance or Support) interact with Kill Bill. Kaui makes it possible for your employees to manage tasks like issuing refunds and adjusting invoices.
All the basic features to run a billing and payments platform
Kill Bill includes all of the basic features a business needs to run subscription billing processes and payment processes. Thousands of organizations use Kill Bill as their basic billing system with payment processing features.
Modify Kill Bill to exactly suit your business needs
However, the real power of Kill Bill lies in building your own business logic on top of it to create a customized billing and payments solution. You can write plugins to modify Kill Bill’s behavior or integrate with third-party vendors.
Use open-source plugins or create your own
Kill Bill already has many open-source plugins. You can use them as examples for creating your own or modify them for your own use. For example:
- Fraud detection solutions (like Accertify or Feedzai)
- Tax provider solutions (like Avalara AvaTax)
- Credit card account updaters (like Visa Account Updater)
Who should use Kill Bill?
Honestly, here at Kill Bill, we believe that any business that bills its customers and/or accepts payment online can (and should) use Kill Bill as its billing system.
Maybe you’re frustrated with the lack of customization available from the more popular SaaS billing-payment providers. Or perhaps you’re a startup with a tight budget.
Kill Bill is eminently suitable because it’s affordable, extensible, and – most importantly – secure and stable.
Is Kill Bill right for your business?
We’ve put together a checklist to help you decide if Kill Bill is right for your business: