# FreePBX
> Open-source web-based GUI for managing Asterisk-based PBX systems

FreePBX is an open-source management interface for Asterisk PBX, widely used by VoIP providers.

## What is FreePBX?
FreePBX is a free, open-source graphical user interface (GUI) that controls and manages Asterisk, the most widely deployed open-source PBX engine. It provides a web-based admin panel for configuring extensions, ring groups, IVR menus, voicemail, and more.

## FreePBX in the provider ecosystem
Many VoIP service providers use FreePBX (or its commercial distribution, Sangoma PBXact) as their PBX backend. When paired with a [white-label softphone](/voip-glossary/white-label-softphone/) front-end, providers can offer a complete hosted telephony solution under their own brand.

## Related Terms
- [PBX](/voip-glossary/pbx/)
- [IP PBX](/voip-glossary/ip-pbx/)