*Revenue adjusted to reflect the transition of direct phone sales to the agency model.

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Forward-Looking Statements and Non-GAAP MetricsThis presentation includes forward-looking statements within the meaning of the federal securitieslaws, including statements regarding our future financial performance. These statements are subject to risks and uncertainties. Actual results may differ materially from our forward-looking statements and projections due to a variety of factors, including but not limited to general economic and market conditions; the effects of competition and technological change; success of marketing, sales and retention efforts; customer demand for and acceptance of our products and services; and the risks described in our filings with the Securities and Exchange Commission, including our Quarterly Report on 10-Q for the quarter ended September 30, 2016. We undertake no obligation to update any forward-looking statements that may be made to reflect events or circumstances that occur, or that we become aware of, after the date of this document. In this document, we provide certain non-GAAP financial measures. A reconciliation of these non-GAAP financial measures to their directly comparable GAAP measures are included on our website.

02/17

About RingCentral

RingCentral, Inc. (NYSE: RNG) is a global provider of cloud unified communications and collaboration solutions. More flexibleand cost-effective than legacy on-premise systems, RingCentral empowers today’s mobile and distributed workforces to be connected anywhere and on any device through voice, video, team messaging, collaboration, SMS, conferencing, online meetings,contact center, and fax. RingCentral provides an open platform that integrates with today’s leading business apps while giving customers the flexibility to customize their own workflows. RingCentral is a leader in the 2016 Gartner Magic Quadrant forUnified Communications as a Service, Worldwide for the second consecutive year. RingCentral is headquartered in Belmont, Calif.

*Revenue adjusted to reflect the transition of direct phone sales to the agency model.

Company Success

0

100

200

300

400

2013 2014 2015 2016

REVENUE IN MILLIONS*

2016 #1 Fastest-Growing and Largest CloudBusiness Communications Leader

Why Customers Choose RingCentral

A Global Footprint

30 Global Office Countries

80 Countries with International

Virtual Numbers

Industry Recognition

A Gartner Magic Quadrant Leaderfor UCaaS 2016 & 2015

Frost & Sullivan Company of the Year 2016

Deloitte Fast 500 Winner 2016

Forbes Most Trustworthy Company 2016

33% CAGR

OpenPlatform

Messaging + Collaboration

Open Platform Milestones

33 Billion APIRequests

350 CustomAPIs

65 App IntegrationsOff the Shelf

3,500Developers

Year in Review

$160

$220

$287

0

100

200

300

400

500

700

900

600

800

1000

2016

$1 BILLION

2020

On the Path to $1 Billion*

“With our momentum and the very large underpenetrated market, we feel confident that we will be a $1 billion revenue company by the end of 2020.”

–Vlad Shmunis, RingCentral Founder, Chairman & CEO

27% C

AG

R

Customers Who Choose RingCentralRingCentral added thousands of customers in 2016. Among these customers, 600 of them have adopted RingCentral Global Office™, a UCaaS solution that streamlines communications on a single platform across offices and employees in multiple countries.

GlobalScale

Source: Gartner (August 2016)

Popular Partner Integrations with RingCentral

$378

$378

Cloud UC + Contact Center

600 Global Office Customers Tripled

Year Over Year

VOICE

TEXT

FAX

AUDIO CONFERENCING

VIDEO CONFERENCING

SCREEN SHARINGCONTACT CENTER

ANALYTICS AND REPORTING

TEAM MESSAGING AND COLLABORATION

OPEN PLATFORM/INTEGRATIONS

GLOBAL OFFICE