Cisco Unified Communications Manager (CallManager)

A unified phone program that combines calls, voicemails, video chatting and more into one platform

Bria

Extend your call server's capabilities by integrating the latest PBX and voice over IP (VoIP) technology

Comcast Business VoiceEdge

Ultra-fast business telephony services with reliable uptime and full access to Comcast's data-streaming services

Yodel.io

This is a unified phone system that connects all your existing services together

MightyCall

VoIP solution designed to meet the needs of entrepreneurs and small businesses

Phone.com

A VoIP solution that allows you to get a phone number and call other people

OnSIP

Provider of WebRTC and VoIP services that offers affordable cloud APIs for developers of proprietary portals

Talkroute

Virtual PBX system with cloud distribution intended for business use

iPlum

Dual-mode phone communications solution that allows business users to combine two lines in one smartphone

MicroSIP

Quickly and easily integrate a portable SIP softphone stack on your windows OS with this program