FreeSWITCH is described as 'Scalable open source cross-platform telephony platform designed to route and interconnect popular communication protocols using audio, video, text or any other form of media. It was created in 2006 to fill the void left by proprietary commercial solutions' and is an app in the social & communications category. There are more than 10 alternatives to FreeSWITCH for a variety of platforms, including Linux, Windows, Mac, Android and iPhone apps. The best FreeSWITCH alternative is Asterisk, which is both free and Open Source. Other great apps like FreeSWITCH are 3CX, FreePBX, Yate - Yet Another Telephony Engine and Wazo.
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).
The MiRTA PBX is an interface written in PHP using Mysql as backend to manage a multitenant PBX built over the Asterisk Open Source PBX. An easy to use interface allows you to manage one or more Asterisk PBX in a multi tenant, load sharing and high availability configuration.
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.
sipXcom provides complete enterprise-grade telephony, unified messaging, Instant messaging, audio conferencing, and many other features.
Ozeki Phone System XE is a Software PBX telephony platform for Windows. Ozeki enables your applications to connect PBX and access IVR, Webphone, SMS sending, 3D video calls and other functionalities. It makes possible to use PHP VOIP, .
The Taridium ipbx is a complete software-based VoIP PBX system that replaces traditional proprietary hardware PBX. ipbx runs on an open source operating system (Linux) without the need for extra software licenses and is based on the SIP standard.
A robust SIP/H.323/WebRTC softswitch for Windows with a long list of features including PBX and billing.
Vodia Phone app is a free add-on for your Vodia PBX that lets you connect to your account on your Vodia PBX. Starting with Android 5.0 Lollipop, based on the WebRTC technology.
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.
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