RingCentral is a major Vonage alternative whose key advantages are flexible functionality, excellent integration, and good value for money. It can be customized to meet your specific requirements, whether you need a communication system for cooperation or a contact center configuration. GrassHopper is a Vonage competitor that can turn a mobile phone into a business phone, get a toll-free 1-800 number for your business, and segregate and filter phone calls. Users can take sales calls whenever and wherever they choose with Grasshopper because their phones can be converted into business phones. CloudTalk is a Vonage competitor that provides advanced call center features, intelligent call routing, and quality statistics and monitoring services.