Five9 - Five9 provides cloud-based call center software for sales, marketing and support.
Fonvirtual - Virtual PBX, international virtual phone numbers and Call Center software, with WebRTC extensions and agents. The new VoIP phone system. No term contracts.
VoIPstudio - VoIPstudio is an award-winning VoIP system that offers businesses of all sizes a scalable communication solution. It’s inexpensive, easy-to-use, offers a full suite of PBX features, and is fully integrated for CRM.
Aheeva - The Omnibrand, Omnichannel, Omnilocation Contact Center Solution
Call2Kitchen.net - The best call center for restaurants
8x8 Cloud Contact Center - 8x8 Cloud Contact Center is a VoIP call center solution.