sipXecs is described as 'A SIP based implementation of a PBX / unified communications system' and is an app in the Social & Communications category. There are more than 10 alternatives to sipXecs for a variety of platforms, including Linux, Windows, Mac, Android and iPhone. The best alternative is Asterisk, which is both free and Open Source. Other great apps like sipXecs are 3CX Phone System (Freemium), FreeSWITCH (Free, Open Source), Wazo (Free, Open Source) and Kamailio (Free, Open Source).
Thirdlane Business PBX platform provides all of the easy-to-use advanced communications features businesses need, with the flexibility for customization and growth - at a fraction of the cost of competitive solutions.
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 calls and other functionalities. It makes possible to use PHP VOIP, .