The top-line growth is clearly Zoom's strength over RingCentral, but let's talk valuation. It has yet to post a financial report as a public company - it will announce fiscal first-quarter results next month - but analysts see revenue growth slowing to 79% this year. Revenue rose 34% to hit $201 million for RingCentral's first quarter, matching the 34% top-line surge it posted for all of 2018. Investors don't typically view phone systems and video-conferencing as fields fertile for growth, but it's hard to overlook the heady growth at both companies. The two companies announced a multi-year extension to their existing partnership last week, allowing RingCentral customers to continue replacing their legacy systems with one that combined its cloud PBX with Zoom's video communications platform. RingCentral accounts can also engage in video conferencing, and that's where Zoom Video enters the picture. Its flagship product is a cloud-based system where companies pay as little as $19.99 a month per user to allow businesses to seamlessly route inbound calls to IP phones, smartphones, PCs, and tablets. RingCentral offers enterprise communications, collaboration, and contact center solutions.

Zoom phone vs ringcentral