unxsVZ uSIPSwitch

uSipSwitch a micro sip switch (sip proxy) perfect for edge SIP SBC work (e.g. hosted PBX business).

3CX Phone System

3CXPhone is a free VoIP phone available for Windows, iPhone or any Android based smart phone such…

An open source telephony switching and private branch exchange service for Linux.

AsteriskNOW is the fastest way to get started building custom telephony solutions with Asterisk.

Dimelo, Unified management platform for your digital conversations

FreeSentral is a full IP PBX consisting of a Linux Distribution, an IP PBX and a Web Graphical User…

FusionPBX is an open source FreeSWITCH GUI.

Kamailio® (successor of former OpenSER and SER) is an open source SIP server released under…

The most advanced interface for managing Asterisk PBX with Multitenant and Realtime capabilities

PBX in a Flash is a PBX system based on Asterisk, FreePBX and CentOS, coming as an ISO download.

RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies

Starfish PBX aims to be an open source alternative to Digium’s Switchvox.

Vodia Phone app is a free add-on for your Vodia PBX that lets you connect to your account on your…

VoipSwitch provides complete VoIP and unified communications solutions.

Wazo is a unified communications platform based on Asterisk and focused on extensibility.

FreePBX is a web-based open source GUI that controls and manages Asterisk (PBX).

OpenSIPS (Open SIP Server) is a mature Open Source implementation of a SIP server.