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
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
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
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 Requires "a lot of" appliances to work, you must spend a lot of money to do this. With FreeSwitch you need a PC, OpenVox Card and ready. Guest • Aug 2015 Disagree Agree
opensips 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... Free Open Source Linux No features added Add a feature 0 Like
unxsVZ uSIPSwitch uSipSwitch a micro sip switch (sip proxy) perfect for edge SIP SBC work (e.g. hosted PBX business). Comes with web console and DNS health tools. Uses modern clustering... Free Open Source 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
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
AsteriskNOW AsteriskNOW is the fastest way to get started building custom telephony solutions with Asterisk. Simply download the .iso file, burn it to a CD, drop it into the CD or... Free Linux No features added Add a feature 6 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
VoipSwitch VoipSwitch is a SoftSwitch System with routing and billing, with SIP protocol support (in older versions also H323). Basic package includes softswitch app, IVR app... Commercial Windows Call recording IVR Add a feature 1 Like
PBX in a Flash 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... Free Open Source Linux No features added Add a feature 3 Like
