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5 open source billing systems to watch

Integration between components turns billing into business management -- without breaking the bank!

Collecting money from customers should be the easy part of your business, but an billing system that underperforms can make life unnecessarily difficult for CIOs.

In this edition of 5 Open Source Products to Watch, we take a look at billing systems. That’s right, there are open source applications available for invoicing and billing customers. They’re open source, Web-based and can be extended and integrated to suit specific needs.

Best of all, they don’t cost a red cent.

1. AgileBill

AgileBill was released as a commercial product in 2004 and then open sourced by its creator Tony Landis in 2008. AgileBill is a billing and invoicing application suitable for the membership/subscription type of business model, including Web hosting companies, ISPs and VoIP providers.

AgileBill features plug-ins for payment processing, provisioning, and interfacing with third-party applications and services. It has also given rise to the AgileVoice and AgileISP VoIP and ISP billing applications, respectively.

Licence: Open AgileBill Licence

2. Amberdms Billing System

The Amberdms Billing System (ABS) is a billing system that also provides a number of useful accounting and business management functions. ABS has apps for invoicing, service management, HR and time-keeping, and is designed for small and medium businesses as well as small ISPs and IT companies.

Third-party integration can be done via the API and commercial support is available from New Zealand company Amberdms.

ABS claims to have an “easy UI” and integration between timekeeping and invoicing features means customers can be automatically billed for hours worked.

Licence: AGPL

3. Freeside

Freeside is a billing, trouble ticketing and provisioning automation software tailored to online businesses, including ISPs, ITSPs, hosting and content providers.

The billing functionality includes real-time credit card and e-cheque processing using the popular payment gateways; e-mail, fax, printed and online invoicing; and flexible pricing and rating plans, like anniversary billing and usage based billing. Freeside also integrates Request Tracker, another open source project for support ticketing.

Other features include a customer self-care portal (with an API for extensibility) and reseller functionality which allows “virtualized” reseller access.

Licence: AGPL

4. CitrusDB

CitrusDB is a billing system developed with PHP and MySQL that can also be used to keep track of customer information (CRM), services, products, invoices and credit cards, and support information. The goal of the project is to provide an open source customer care and billing solution that can be used in many different service industries like ISPs, consulting, and telecommunications.

Standard billing features include any billing cycle -- one-time, monthly, bi-monthly, quarterly, 6-months or yearly -- and billing is able to provide batch credit card exports, printed invoices, or emailed invoices.

CitrusDB also has an online account manager which allows customers to view their account services and recent balance and payments. It also allows them to submit support notes to their account via the online form.

Licence: GPL

5. JBilling

JBilling is a Web-based billing system developed in Java. It is cross-platform and supports multiple database systems. The project claims it can scale to “invoice millions” and can be run on a single server or a cluster of specialised nodes.

Its features include automated invoice generation and payment processing; the ability to send invoices as e-mails, PDF attachments or paper; the ability to accept partial and advance payments; bundles, packages, plans and promotions; and a business rules management system.

Professional support is also available for JBilling, which also has multiple language, currency and localisation support.

Licence: AGPL

For more articles in this series, be sure to check out:
5 open source security projects to watch
5 open source network management projects to watch
5 open source virtualisation technologies to watch
5 open source CRM systems to watch
5 open source VoIP softphones to watch
5 open source office suites to watch
5 open source IP telephony projects to watch
5 open source help desk apps to watch
5 enterprise open source wiki apps to watch
5 open source project management apps to watch
5 free project management applications you must try

Tags open sourcebilling systems

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What about xTuple?

You forgot one: xTuple PostBooks edition is a full ERP / CRM / General Ledger / Billing application, based on PostgreSQL and Qt.

christmas stocking fillers


I install Citrusdb on linux and run without problem.
When I tried on Xp it gave me Query failed when change the billing
type for a customer.
If I go to the billing table through mysql and change the billing type
of a customer, and then trying the Print New Invoices tool on citrusdb
it gave me: history update failed.
Any suggestion?



sql strict mode

You probably need to turn off STRICT_TRANS_TABLES or STRICT_ALL_TABLES mode in mysql.

Or something went wrong when the initial database was created on the win XP server.

Gilly Harris


You forgot a big one....

You made a glaring exception in your research for this article. Transverse and our SOA-based, open source product blee(p) is the telecom industry's first end-to-end billing and BSS solution that is built on an open source platform. In 2009 Transverse was recognized by Gartner as a Cool Vendor because of our open source approach. Further to that, Fierce Wireless designated Transverse as one of their Fierce15 innovative companies teed up for success because of our innovative approach that leverages open source. I urge you to check us


Gilly Harris
Director of Marketing



If blee(p) is open source, then why there is even not one link to download it on your website ???



Hi guys, which of them have also a Windows release ?

I need to deploy blling for Wireless users in a public environment. Internet access should be granted and managed by receptionist or IT unskilled personnel.

Has anyone experienced a same scenario ?
What i need to use ?
Why i can't access to webpage.

I'm sorry for my many dubts but billing is a new world for me.




Yeah, no download link or information at all on the transverse website.



We had a long discussion with Transverse about access to the source. They are right, under GPL, they are not under any obligation to release source.

However to call it "Open Source" is an abuse of the generally accepted usage of what open source means. It's blah-blah-ware in my opinion.



That's complete BS. The GPL guarantees the source is available. LGPL on the other hand does not.

Rop Kiplagat


Guys I am looking for an open source system that I can customize for a water billing utility company. Is jbilling the most customizable?

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