Vonage is described as 'We’re making communications more flexible, intelligent, and personal, to help enterprises the world over stay ahead. We provide unified communications, contact centers and programmable communications APIs, built on the world's most flexible cloud communications platform' and is an website in the social & communications category. There are more than 25 alternatives to Vonage, not only websites but also apps for a variety of platforms, including Android, iPhone, SaaS and Windows apps. The best Vonage alternative is UniStack. It's not free, so if you're looking for a free alternative, you could try Wazo or Fonoster. Other great sites and apps similar to Vonage are Smarter Contact, Twilio, Lead Sherpa and Textmagic.