Top 10 Best Voice over IP (VoIP) Websites Here are top 10 most popular voice over IP (VoIP) websites. 1 Zoom zoom.us 2 OpenPhon openphone.co 3 RingCentral MVP ringcentral.com 4 Dialpad Talk dialpad.com 5 Aircall aircall.io 6 CloudTalk cloudtalk.io 7 Microsoft Teams microsoft.com 8 Grasshopper grasshopper.com 9 3CX 3cx.com 10 Ooma Office ooma.com
