Browse free open source PBX software and projects for Linux below. Use the toggles on the left to filter open source PBX software by OS, license, language, programming language, and project status.
Issabel PBX - Unified Communications
Unified Communications Server
VICIdial Contact Center Suite
The most affordable CRM system according to Capterra
Enterprise telephony recording and retrieval system
A domain based multi-tenant PBX & voice switch for FreeSWITCH
Project about FusionPBX on Live Medium
Respins of various open source PBX projects