A subscription billing software works on top of a payment gateway, and makes managing everything related to your pricing, subscriptions, payments, metrics, and customers a cake walk, so that all you have to do is just sit back and focus on your product.
Top Open Source Subscription Billing Software:
Open-Source Subscription Billing & Payment Platform – Kill Bill. Kill Bill is a platform for subscription billing and payments integration. Its plug-in architecture allows you to easily apply custom logic and integrate with third party systems.
Subscription & usage revenue management cloud platform – Opencell. Opencell is the cloud-ready subscription & usage revenue management platform for acquiring, monetizing and retaining recurring customers.
OpenSourceBilling. OSB is an easy software which provides hassle free billing: Create and send invoices to your clients. Partial payments tracking.
Open BRM is a carrier-grade open source billing platform aimed at telecommunications, Subscription, Utilities and logistics organizations. Built using state of the art but future proof technology, this project takes over from where JBilling can arrive.
Open Billing System. OBS-Cost Effective Subscription Billing and CRM, A SaaS based billing Solution.
Chargebee: Subscription Billing & Recurring Payments Software. Chargebee lets you automate your recurring billing, manage subscriptions at scale and access metrics that matter.
CitrusDB – The Open Source Customer Service and Billing Software. CitrusDB is open source customer service and billing software solution (CC&B) that uses PHP and a database backend (MySQL) to keep track of customer information, BSS, operational CRM, services, products, billing invoices and credit cards, and support information.
Logic Invoice – Open Source Accounting & Invoicing Solution. Logic Invoice is a free self hosted PHP-based accounting and invoicing software. The best free PHP invoice / billing software you will ever need.
BillRun – Enterprise-Grade Billing System. BillRun is used in Enterprise companies which require efficient system and tools to receive, process, rate, charge and monitor customer usage. The common billing usage are telecom CDR-s, shopping items, pre-pay cards, real-time charging and internet of things. The system support different type of output such as customer invoices, wholesale reports for management, system monitor, alerts, anti-fraud, and even more.
SAAS Ecom: Recurring billing open source for .NET. SAAS Ecom uses the most popular technologies in the .NET world. The main requirements for your application is that you need to use ASP.NET Identity 2.1 for membership, and also Entity Framework 6 Code First. Although, if you’re not using EF Code First currently, you can use a second database for membership and SAAS Ecom, and another one for your application data.