Nextiva provides business VoIP service to businesses of all sizes. Nextiva is based in Arizona, but provides award-winning business VoIP service to all of the United States and Canada.
Nextiva focuses on business VoIP, and they offer service plans that can accomodate anything from a small home business, to a mid-sized business, to a national corporation.
Nextiva is known for their outstanding customer support, as all their support representatives are located in the United States, rather than overseas. With Nextiva, you will not be expected to sign any contracts either, and their business VoIP plans feature unlimited calling.
Support is knowledgeable and helpful. I am saving $250 each month on the bill when compared to AT&T. Setup was easy (however the porting of my numbers took 3 weeks to complete) Features are powerful and abundant.