Kamailio

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

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.

Cloud Telephony delivers automated telephone applications to any phone, any place, anytime.

Switch is a cloud-based phone system built for Google Apps users.

Dimelo, Unified management platform for your digital conversations

FusionPBX is an open source FreeSWITCH GUI.

Your Open Source Solution For Unified Comunnications And More…

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.

Incredible PBX is a secure and feature-rich implementation of the Asterisk® PBX.

Brings voice and messaging to your web and mobile applications.

VitalPBX is a full-feature PBX (phone system) based on Linux and Asterisk.

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.