Cloud Telephony is described as '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'. There are more than 10 alternatives to Cloud Telephony, not only websites but also apps for a variety of platforms, including Linux, Windows, Mac and Android. The best alternative is Asterisk, which is both free and Open Source. Other great sites and apps similar to Cloud Telephony are Twilio (Freemium), RingCentral Engage Digital (Paid), Genesys (Paid) and Plivo (Paid).
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, .
uContact is an All in One contact center solution that includes ACD, recording, dialers (preview, power and predictive), Social Networks, CRM, WFM, quality, call reporting, live monitoring, IVR, SMS, Web Chat with audio and video, Gamification, etc.