What are some alternatives?
When comparing RingCentral and Vonage, you can also consider the following products
Nextiva - Business VoIP, cloud phone systems trusted by more than 150,000 companies. Powered by the leading cloud PBX VoIP platform, Nextiva is rated the best business VoIP service provider.
Google Voice - Google Voice gives you one number for all your phones, voicemail organized in an email format, free...
FluentStream - FluentStream Technologies is an advanced telecommunications company with a core focus on cloud-based applications.
8x8 - 8x8's VoIP business phone systems deliver affordable, cloud-based voice, video, messaging, and call center solutions, helping you serve customers anytime, anywhere.
Bitrix24 - Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
Viber - Free and secure calls and messages to anyone, anywhere. Keep your conversations going no matter where you are.