8x8 Acquires Wavecell✓ Enters Global Communications

Platform-as-a-Service (CPaaS) Market

✓ Expands Industry-Leading Cloud Communications Platform

July 17, 2019

2 | © 8x8, Inc. All Rights Reserved.

Acquisition provides 8x8 with access to Asia Pacific’s leading communications platform to pursue CPaaS globally, and represents a natural expansion and cross-sell opportunity for 8x8 to extend unified communications (UCaaS), contact center (CCaaS), and video communication (VCaaS) into the CPaaS market.

8x8 Acquires Wavecell, Leading CPaaS Technology Platform

★ INCREASES 8x8’s ADDRESSABLE MARKET TO INCLUDE CPaaS○ Adds additional $10+ billion in high-growth CPaaS market to 8x8’s low-penetrated comms market of $50 billion for $60+ billion Total Addressable Market○ Expands 8x8's global voice & messaging network with relationships and contracts across more than 190 carriers globally, including extensive coverage across Asia○ Provides sales and marketing scale to expand globally through cross-sell opportunity between 8x8 X Series and Wavecell core markets

★ ADDS CPaaS TECHNOLOGY TO 8x8 PLATFORM TO ENHANCE 8x8’s LEADERSHIP POSITION AS ONLY FULLY-OWNED END-TO-END CLOUD PLATFORM○ Further extends 8x8’s competitive advantage as the only fully-owned, cloud technology platform with UCaaS, CCaaS, VCaaS and CPaaS solutions able to natively

offer both pre-packaged communications, contact center and video solutions and open APIs to embed communications into an organization’s core business processes○ Deepens 8x8's technology prowess with comprehensive elastic, cloud-native API platform; provides cloud-based tools that allows developers and enterprises to

embed contextual communications in websites, apps and business workflows ○ Provides SMS/text messaging and Chat App support at global scale for unprecedented visibility into customer conversation○ 8x8 video-embedded technology in Wavecell enables contact center support via mobile devices (e.g., field service workers)

★ EXPANDS 8x8’s INTERNATIONAL PRESENCE○ Headquartered in Singapore with offices in Indonesia, Philippines, Thailand, and Hong Kong○ Processes 2+ billion messages per year with coverage in 190+ countries, 290+ mobile operators and partners, and 500+ customers including hyper-growth Asian e-

commerce, fintech and logistics businesses○ Wavecell leadership and development teams join 8x8

★ ATTRACTIVE TRANSACTION ECONOMICS○ Total consideration of approximately USD $125m, in combination of approximately USD $69m in cash and USD $56m in 8x8 common stock, with USD $12 million of

common stock subject to certain vesting over a three-year period, for a net U.S. GAAP purchase price of USD $113 million (subject to customary post-closing adjustments)

○ Represents a multiple of less than 4x anticipated Wavecell calendar 2019 revenue○ Expect Wavecell business to be accretive to 8x8’s revenue growth rate and have minimal impact on full-year fiscal 2020 non-GAAP pre-tax loss

3 | © 8x8, Inc. All Rights Reserved.

CPaaS: Communications APIs that Drive Companies Digital Transformations and Differentiated Customer Experiences at Scale

Your Business Your Customer Experiences At Scale

Omnichannel customer support (Voice/SMS/Chat/ Video/Bots/Email)

Alerts and notifications to

customers on orders, confirmations,

deliveries

Multi factor authentication and

customer onboarding

Personalized mobile marketing

campaigns

Asset, fleet, staff real-time optimization

Growing CPaaS Use Cases

Reach customers everywhere with a global, omni-channel, high volume platform

Personalize customer communications across all digital touchpoints (mobile, website, apps)

Power-up business workflows with real-time voice, video and messaging

4 | © 8x8, Inc. All Rights Reserved.

Wavecell is Asia’s Leading Cloud CPaaS Platform

SMSSMS API to send

messages to customers globally

Chat AppsSend richer messages and

content to user of major chat apps (e.g. WhatsApp)

Video InteractionIntegrating Video

into mobile apps or websites

VoiceInteractive

Text-to-Speech (TSS) phone calls

>9Years of

Experience

500+Enterprise Customers

190+ Countries with First Class Connectivity

2B+ Messages per

Year (80%+ in APAC)

190+ Direct MNO Connections

100+Global Wholesale

Partners

Wavecell’s Product Offerings TodayProgrammable Cloud APIs for Embedded Real-Time Communications

5 | © 8x8, Inc. All Rights Reserved.

Google RCS

Wavecell Customers & Partners Include Hyper-Growth Companies Driving the Expansion of the Digital Economy

representative Partners

representative Customers

• Top 3 most powerful Transportation/Logistic brands in Southeast Asia

• Top 3 highest valued FinTech company in the world

• Leading homegrown FinTech platform in Indonesia

WhatsApp

6 | © 8x8, Inc. All Rights Reserved.

Wavecell Expands 8x8’s TAM to $60+ BillionWorldwide CPaaS market growing at 51% CAGR to $10.9 billion opportunity by 2022

By 2020,

30% of enterprises will deploy CPaaS

use cases—up from <5% in 2017

(Gartner)

2017 (A) 2018 (A) 2019 (E) 2020 (E) 2021 (E) 2022 (E)

$1.4B$2.3B

$3.5B

$5.4B$8.2B

$10.9B

1IDC Market Analysis Perspective (2018): Communications (CPaaS) Market 8x8’s

$60+ Billion TAM

1CPaaS $10.9 B2Existing Markets $53.8 B2Existing Markets include UCaaS, VCaaS and CCaaS as defined in IDC Worldwide Unified Communications and Collaboration Forecast, 2018–2022

7 | © 8x8, Inc. All Rights Reserved.

Wavecell Further Enhances 8x8’s Technology Platform 8x8, the Only Fully-Owned UCaaS, CCaaS, VCaaS & Now CPaaS Cloud Communications Platform

UNIFIED DATA STORE

UCaaS

Voice Integrations Contact Center IVR Video Messaging

Customers Prof Services Developers ASPs

CCaaS VCaaS

Programmable APIs

ANALYTICS

● Quality Management● Speech Analytics● Data Analytics

Programmable Platform

CPaaS

8x8’

s Cl

oud

Com

mun

icat

ions

Pla

tfor

m

8 | © 8x8, Inc. All Rights Reserved.

Wavecell Further Expands 8x8’s International Coverage

AylesburyUnited Kingdom

SydneyAustralia

Singapore

Hong Kong China

New YorkNew York

LondonUnited Kingdom

San JoseCalifornia

Cluj-NapocaRomania

ManilaPhilippines

Jakarta Indonesia

AucklandNew Zealand

MinneapolisMinnesota

BangkokThailand

San Jose, CANew York, NYMinneapolis, MNCluj-Napoca, Romania London, UKAylesbury, UKAuckland, New ZealandSydney, Australia

SingaporeBangkok, ThailandHong Kong, ChinaJakarta, IndonesiaManila, PhilippinesCebu, Philippines

CebuPhilippines

9 | © 8x8, Inc. All Rights Reserved.

Wavecell provides 8x8 access to Asia Pacific’s leading communications platform to pursue CPaaS globally.It represents a natural expansion of and cross-sell opportunity for 8x8 as it extends UCaaS, CCaaS and VCaaS cloud platform to address the CPaaS market.

8x8 Acquires Wavecell, Leading CPaaS Technology Platform

★ Increases 8x8’s Addressable Market To Include CPaaS

★ Adds CPaaS Technology To 8x8 Platform To Enhance 8x8’s Leadership Position as Only Fully-Owned End-To-End Cloud Platform

★ Expands 8x8’s International Presence

★ Attractive Transaction Economics

10 | © 8x8, Inc. All Rights Reserved.

This presentation includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and Section 21Eof the Securities Exchange Act of 1934. These statements relate to the release of new products, integration of new products and technologyincluding Wavecell’s CPaaS technology, market demand for our products (including the expected size of the total addressable market for our theUCaaS, CCaaS, VCaaS, and CPaaS products), changing industry trends, future geographic expansion, business strategies, future operatingperformance and outlook, future revenue growth and accretive impact of the Wavecell acquisition on 8x8’s future growth, and expected futurelosses. These forward-looking statements are predictions only, and actual events or results may differ materially from such statements dependingon a variety of factors. These factors include, but are not limited to:

• Customer adoption and demand for our X-Series product line and CPaaS may be lower than we anticipate.

• Competitive dynamics of the UCaaS, CCaaS, VCaaS, CPaaS and other markets in which we compete may change in ways we are not anticipating.

• Third parties may assert ownership rights in our IP, which may limit or prevent our continued use of the core technologies behind our solutions.

• We may not achieve our target service revenue growth rate, or the total revenue, earnings, bookings or other amounts we forecast inour guidance, for a particular quarter or for the full fiscal year 2020 or beyond.

• Our customer churn rate may be higher than we anticipate.

• The investments we make in increasing headcount, marketing X Series and CPaaS, and other areas of our business may not result in accelerated revenue growth.

For a discussion of such risks and uncertainties, which could cause actual results to differ from those contained in the forward-looking statements,see “Risk Factors” in the Forms 10-K and 10-Q filed by 8x8, Inc. with the Securities and Exchange Commission. All forward-looking statements arequalified in their entirety by this cautionary statement, and 8x8, Inc. undertakes no obligation to update publicly any forward-looking statementfor any reason, except as required by law, even as new information becomes available or other events occur in the future.

Safe Harbor

© 8x8, Inc. All rights reserved. All trademarks identified by the ®, ™, or SM are registered trademarks, trademarks, or service marks of 8x8, Inc.

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