Nextiva vs OnSIP

17
Nextiva
The Nextiva cloud-based phone system is an all-inclusive unified communication (UC) solution designed for small to large enterprises. Business VoIP phone systems trusted by more than 90000 companies. Powered by the leading cloud PBX VoIP platform, Nextiva is rated the best business VoIP ...
3
OnSIP
Virtual PBX Service For Any Business, provides virtual office connectivity, user friendly Web 2.0 management, free extension to extension calls, free internet to internet calls