What are some alternatives?
When comparing Telcob and XiVO, you can also consider the following products
BulkSMS - SMS messaging service provider offering two-way SMS communication services.
Wazo - Wazo is a unified communications platform based on Asterisk and focused on extensibility.
MyOperator - MyOperator is a cloud-based call management system for voice communication purposes.
FreeSWITCH - FreeSWITCH is an open-source media application designed to support popular protools such as SIP and WebRTC and provides a platform to develop voice and video applications.
Twilio - Brings voice and messaging to your web and mobile applications.
Elastix - Elastix is an open source Unified Communications Server software that brings together IP PBX...