31 Like Asterisk Good alternative? YES NO 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 Windows Linux Low level Add a feature
5 Like freepbx Good alternative? YES NO 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
12 Like FreeSWITCH Good alternative? YES NO 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 Windows Linux BSD No features added Add a feature
7 Like 3CX Phone System Good alternative? YES NO 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
3 Like FusionPBX Good alternative? YES NO FusionPBX is an open source FreeSWITCH GUI. FusionPBX can be used as a high available single or domain based multi-tenant PBX, carrier grade switch, call center server... Free Open Source Linux BSD No features added Add a feature
2 Like kamailio Good alternative? YES NO 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
1 Like VoipSwitch Good alternative? YES NO 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 Thirdlane Multi Tenant PBX Alternative? YES NO Thirdlane® Multi Tenant PBX Platform is a reliable, cost-effective Multi Tenant IP PBX and Unified Communications software platform with support for voice... Commercial Linux Multi-Tenant Add a feature
0 Like Mizutech VoIP Server Good alternative? YES NO A robust SIP/H.323/WebRTC softswitch for Windows with a long list of features including PBX and billing. Free Windows No features added Add a feature
0 Like opensips Good alternative? YES NO 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 Ozeki Phone Systems Good alternative? YES NO 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... Commercial Windows IVR Video calling Add a feature
1 Like Starfish PBX Good alternative? YES NO 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
