BVoIP - BVoIP allows to easily add Cloud & On-Premise VoIP PBX to the product offering without having to re-invent the wheel or add another layer to the daily operations..

Google Voice - Google Voice gives you one number for all your phones, voicemail organized in an email format, free...

OnSIP - OnSIP offers cloud phone sytem for business communications across all devices.

Mitel - Business Communications and Collaboration

Loop Communications - Loop Communications provides hosted VoIP business phone systems to small businesses and mid-sized companies.

Phonebooth - Phonebooth is one of the leading voip providers, providing phone systems & phone service for small businesses.