Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs
Mitel - Business Communications and Collaboration
Kixie - Better sales, made simple. Engage customers more effectively with Kixie's ultra-reliable voice & text dialer and easy automations.
Google Voice - Google Voice gives you one number for all your phones, voicemail organized in an email format, free...
CloudTalk - Work locally, grow globally
Phonebooth - Phonebooth is one of the leading voip providers, providing phone systems & phone service for small businesses.