FreePBX is #14 in Top 18 Business Phone systems
FreePBX is a web-based open source GUI (graphical user interface) that controls and manages Asterisk (PBX), an open source communication server. FreePBX is licensed under the GNU General Public License (GPL), an open source license.
Positions in ratings
#14 in Top 18 Business Phone systems
The best alternatives to FreePBX are: Asterisk, 3CX