FreeSentral is a full IP PBX consisting of a Linux Distribution, an IP PBX and a Web Graphical User Interface for easy configuration
Cost / License
- Free
- Open Source
Platforms
- Linux

Elastix is described as 'More than a PBX, with Elastix you can communicate with your customers through voice, video and live chat from anywhere. Built-in video conferencing, website live chat and smartphone apps, ensure your agents remain productive through one unified mobile solution' and is a IP PBX system in the social & communications category. There are more than 10 alternatives to Elastix for a variety of platforms, including Linux, Windows, Mac, BSD and Web-based apps. The best Elastix alternative is Issabel, which is both free and Open Source. Other great apps like Elastix are FreePBX, RingCentral, FreeSWITCH and Yate - Yet Another Telephony Engine.
FreeSentral is a full IP PBX consisting of a Linux Distribution, an IP PBX and a Web Graphical User Interface for easy configuration

XiVO is an IP-PBX, a unified communications platform that connects phones on a local or private network with other networks such as public landlines and mobile telephones.




VitalPBX is a full-feature PBX (phone system) based on Linux and Asterisk. VitalPBX is extremely easy to use, fast and secure. VitalPBX is free to use, including for commercial use, with no limitations of the amount of users.


PBX in a Flash is a PBX system based on Asterisk, FreePBX and CentOS, coming as an ISO download. A two stage installation process allows for more flexibility for the installation of the PBX specific components.
VoipSwitch is a SoftSwitch System with routing and billing, with SIP protocol support (in older versions also H323).


sipXcom provides complete enterprise-grade telephony, unified messaging, Instant messaging, audio conferencing, and many other features.
Voice Portal delivers on industry leading IT fit, reliability, scalability and manageability. Voice Portal meets today"s demand for simpler IT-managed speech and video self service solutions.
OpenSIPS (Open SIP Server) is a mature Open Source implementation of a SIP server. OpenSIPS is more than a SIP proxy/router as it includes application-level functionalities. OpenSIPS, as a SIP server, is the core component of any SIP-based VoIP solution.
IvozProvider supports multiple management levels, from Global platform administrator to final user, each of them having its own web interface with visibility to perform configuration tasks.
Our industry-leading solutions foster true omnichannel engagement, performing equally well across all channels, on-premise and in the cloud. Experience communication as it should be: fluid, instinctive and profoundly empowering.