Top 10 Best Voice over IP (VoIP) Websites admin - 09 Feb 2022 Here are top 10 most popular voice over IP (VoIP) websites. Zoom zoom.us OpenPhon openphone.co RingCentral MVP ringcentral.com Dialpad Talk dialpad.com Aircall aircall.io CloudTalk cloudtalk.io Microsoft Teams microsoft.com Grasshopper grasshopper.com 3CX 3cx.com Ooma Office ooma.com