A robust SIP/H.323/WebRTC softswitch for Windows with a long list of features including PBX and billing.

Kamailio® (successor of former OpenSER and SER) is an open source SIP server released under GPL, able to handle thousands of c ...

Asterisk is free software that transforms a computer into a communication server. Asterisk lets you build applications like PB ...

FreeSWITCH is a scalable open source cross-platform telephony platform designed to route and interconnect popular communicatio ...

Thirdlane Business PBX platform provides all of the easy-to-use advanced communications features businesses need, with the fle ...

Wazo is mainly an IPBX that provides communication services such audio, video, and instant messaging based on the use of stand ...

Ozeki Phone System XE is a Software PBX telephony platform for Windows. Ozeki enables your applications to connect PBX and acc ...

sipXcom provides complete enterprise-grade telephony, unified messaging, Instant messaging, audio conferencing, and many other ...

Starfish PBX aims to be an open source alternative to Digium’s Switchvox. The goal is to have a software equivalent to which w ...

3CXPhone is a free VoIP phone available for Windows, iPhone or any Android based smart phone such as Google Nexus, Sony Xperia ...

The Vodia PBX is a software based IP-PBX phone system which provides advanced features like: Multi-tenancy, SRTP, ZRTP, Auto A ...

VoipSwitch is a SoftSwitch System with routing and billing, with SIP protocol support (in older versions also H323). Basic pac ...

Yate is a softswitch (concept of separating the network hardware from network software). It supports VoIP protocols: H.323, ...

Zent.io is a Contact Center Cloud Software Multichannel that unify chat, phone and e-mail. All the communication channels will ...

XiVO is a scalable platform based on Asterisk that offers a free and complete PBX solution. It is licensed under the GPLv3. A ...