• VoIP Traffic

  • VoIP Business Solution

  • CDR Billing / Prepaid PostPaid Billing


The Premier VoIP Billing Softswitch Solution for Asterisk

"... it is by far the best open source billing system for asterisk..."

What is A2Billing?

A2Billing is a class 4 and class 5 softswitch with inline billing, designed for providing residential, business and wholesale VoIP services, calling cards, call-back and telephone number resale backed by our professional support services.

Features & Benefits

A2Billing is free and open source software for Asterisk, providing telecoms customer management including admin, agent, customer and online signup pages, with flexible inline rating and billing of calls and services in realtime.

Get Started

Deploying A2Billing is straightforward with our self-help guides and install instructions. Commercial installation and support is also available from Star2Billing allowing you to concentrate on building your telecoms business rather than the technology.

Client Testimonials

  • We have been using asterisk and a2billing for some time, they are excellent products.

    We like to express our appreciation to those who have spent times and efforts to make a2billing an excellent product.

    Thank you A2billing!

  • I have recently this year decided to take the plunge and learn about Asterisk and then a billing system. What a learning curve! Today after a lot of hard work and finally with the help from one of the a2billing team we are up and running. I just called a2billing with my final problem that needed to be solved. Your man who answered the call solved my problem within minutes. This guy did in minutes what I couldn’t do in weeks on the forums and I am really glad I called them, it saved me many more hours of frustration and now I can relax. Thanks to a2billing and thanks also for a great free product!

    Thanks A2Billing Team!

  • I am really happy that I have a real reliable system and now I have moved the most of work on it.. this all is possible because of unconditional help on the A2B forum and hardwork of A2B Team which delivered a real robust and reliable platform.

    ... THANK YOU ALL ...