Asterisk Asterisk is free software that transforms a computer into a communication server. Asterisk lets you build applications like PBX, VoIP gateway, IVR and ACD. Free Open Source Mac OS X Windows Linux Low level Add a feature 31 Like
freepbx FreePBX is a web-based open source GUI (graphical user interface) that controls and manages Asterisk (PBX), an open source communication server. Free Open Source Linux Voice Call Add a feature 7 Like
Wazo Wazo is a unified communications platform based on Asterisk and focused on extensibility. Free Open Source Mac OS X Windows Linux Self-Hosted Extensible by Plugins/Extensions Add a feature 5 Like
3CX Phone System 3CXPhone is a free VoIP phone available for Windows, iPhone or any Android based smart phone such as Google Nexus, Sony Xperia, Motorola Droid or Samsung Galaxy. Connect... Freemium Windows Android iPhone No features added Add a feature 8 Like
FreeSWITCH FreeSWITCH is a scalable open source cross-platform telephony platform designed to route and interconnect popular communication protocols using audio, video, text or any... Free Open Source Mac OS X Windows Linux BSD No features added Add a feature 12 Like
sipXecs A SIP based implementation of a PBX / unified communications system. Free Open Source Linux No features added Add a feature 3 Like
XiVO 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... Free Open Source Mac OS X Windows Linux No features added Add a feature 4 Like
Starfish PBX Starfish PBX aims to be an open source alternative to Digium’s Switchvox. The goal is to have a software equivalent to which we can add additional functionality like: ... Free Open Source Linux No features added Add a feature 1 Like
Yate - Yet Another Telephony Engine Yate is a softswitch (concept of separating the network hardware from network software). It supports VoIP protocols: H.323, SIP, IAX1, IAX2, RTP. For the plain old... Free Open Source Linux No features added Add a feature 7 Like
Elastix Elastix is an open source Unified Communications Server software that brings together IP PBX, email, IM, faxing and collaboration functionality. It has a web interface... Freemium Linux No features added Add a feature 8 Like
Kamailio Kamailio® (successor of former OpenSER and SER) is an open source SIP server released under GPL, able to handle thousands of call setups per second. Among features:... Free Open Source Linux No features added Add a feature 2 Like
Zent.io Zent.io is a Contact Center Cloud Software Multichannel that unify chat, phone and e-mail. All the communication channels will be answered from a single interface. The... Commercial $ $ $ Mac Windows Linux Web Call recording Customer Chat Knowledge base Real time collaboration Add a feature 33 Like
sipXcom sipXcom provides complete enterprise-grade telephony, unified messaging, Instant messaging, audio conferencing, and many other features. Free Open Source Linux Conference Bridging Integrated Chat Add a feature 9 Like
Cloud Telephony The main purpose of cloud telephony is connecting with the customers for providing your services support. IVR is the software which is used for the cloud telephony. Commercial Web IVR Add a feature 0 Like
MiRTA PBX The most advanced interface for managing Asterisk PBX with Multitenant and Realtime capabilities. Commercial Linux No features added Add a feature 0 Like
