FreePBX

FreePBX is an open-source, web-based IP PBX platform that helps organizations build customizable business phone systems. Described as the world’s most popular open-source IP PBX, it is free to download and use, with development supported by a global community. Users can tailor the system to their needs and expand it into a unified communications solution through commercial modules and other add-ons from Sangoma and third parties.

The FreePBX ecosystem includes modules for softphones, paging, phone applications, and call center features, alongside compatible IP phones and supported appliances. Sangoma also offers SIP trunking through SIPStation, VoIP gateways for connecting legacy analog phones and fax machines, and session border controllers to support network security, SIP compatibility, and remote-worker connections. The company provides installation, update, and troubleshooting support, as well as documentation, training, and community resources. FreePBX is part of Sangoma Technologies’ communications portfolio, which also includes PBXact products and cloud services. Together, these tools and services give businesses options for deploying and scaling communications systems across a range of budgets.