List of revenue and growth (2018-2013) for companies in CXTech. We’re entering a new phase in the democratization of telecoms. Communications is now programmable, its revolutionizing the $2.2T telecoms industry. Enterprises large and small, governments, local businesses, hospitals, dentists, web companies, garden centers are all using communications in new ways to improve their operations and customers’ experiences. There are hundreds of companies around the world that are helping businesses use programmable telecoms. Segments covered include: CPaaS (Communications Platform as a Service), UCaaS (Unified Communications Platform as a Service, AKA virtual or cloud PBX), CCaaS (Contact Center as a Service), open source telecom software, authentication and customer experience, omni-channel customer communications, WebRTC (Web Real Time Communications) and much more reviewing the landscape and market sizes.

1. Public CPaaS 2018 Revenue2019 Growth2020 Growth2021 Growth2022 Growth Employees Simple Description
2600Hz / Kazoo 10 30% 30% 25% 25% 40 Refocused on CPaaS / UCaaS enabler with Kazoo
46elks 8 25% 25% 20% 20% 8 Swedish CPaaS
Aculab 25 25% 25% 20% 20% 80 Long established enterprise comms provider
AeriaLink 5 45% 45% 40% 40% 20 Landline messaging
Amazon 180 75% 70% 65% 60% 145
Simple Notifiction Service, MFA, resell of Twilio Voice (but likely
to roll its oen in time), plus voice services like Poly and Chime
Apeiron (bought 2019 Konatel) 2 40% 40% 35% 35% 3 Couple of years old cpaas, based in CA
Apifonica (Dzinga) 10 35% 35% 35% 35% 25 European CPaaS - focused on services
aql 20 35% 35% 35% 35% 80 Long established wholesale telecoms provider
babl.biz 10 35% 35% 35% 35% 20 UK-based CPaaS
Bandwidth 165 30% 30% 25% 25% 400 NAR-focused voice/messaging API (911 focus)
BrightLink 20 40% 40% 35% 35% 30 Cloud based PBX / CPaaS
Callfire 25 40% 40% 35% 35% 90 Voice/SMS customer comms
Callr 5 35% 35% 35% 35% 8 Paris-based CPaaS since 2010
Cequens 45 35% 35% 35% 35% 125 MEA focus
Cloudonix 1 100% 80% 70% 60% Cloud based Asterisk platform
CM 25 20% 20% 15% 15% 100 Dutch Business Messaging / CPaaS
CYDNE 15 35% 35% 30% 30% 80 Notification services (voice and messaging)
Exotel 15 35% 35% 35% 35% 120 India based CPaaS
Flowroute (West) 15 35% 35% 35% 30% 50 NAR-focused SIP Trunking provider
FoneDynamics 5 25% 25% 25% 25% 20 Australian CPaaS bought by Uniti Wireless
hoiio 25 65% 65% 60% 55% 45 Singapore based CPaaS - expanding in Asia
Infobip 400 10% 10% 10% 10% 1800 Original A2P SMS provider, based in Crotia
Intelepeer 170 25% 25% 25% 25% 240
CPaaS products complementary to UC/CC solutions, channel
sales model, expanding internationally
Kaleyra 100 20% 20% 20% 20% 200
Roll up of business messaging and aggregators (e.g. Hook
Mobile) planning to list
Messagebird 95 40% 40% 35% 35% 180 Dutch aggregator (bought iBasis SMS business)
MITTO 30 45% 45% 45% 45% 50 Swiss based B2B CPaaS
Mobtexting 10 25% 25% 25% 25% 50 Indian business messaging expanded into voice
NTH 5 25% 25% 25% 25% 25
GUI based CPaaS across messaging, payments and numbers
(Croatia based)
Plivo 32 40% 40% 40% 40% 180 Voice/SMS API & SIP trunking competitor to Twilio
PlumVoice 20 30% 30% 30% 30% 60 Cloud IVR expanding into cPaaS
RingCaptcha 2 50% 50% 50% 50% 4 Voice/SMS authentication
RouteMobile 80 30% 30% 30% 30% 400
Indian business messaging expanded into broader enterprise and
telco offers (bought Cellent)
SAP 500 0% 0% 0% 0% 1000 Legacy Sybase A2P business
Signalwire 10 100% 90% 80% 70% 25 FreeSwitch's CPaaS

2. Simwood 10 50% 50% 50% 50% 15 ITSP Enabler growing out of the UK.
Sinch (CLX) 450 15% 15% 15% 15% 400 Swedish roll-up of CLX, Mblox, Sinch, Dialogue, etc.
Syniverse 600 0% 0% 0% 0% 1400 Legacy A2P aggregator
Telesign (BICS) 75 40% 45% 45% 45% 300 Leading identity authenitcation provider
TelecomsXchange ? 2 Telecoms exchange
Telnyx 25 35% 35% 35% 35% 90 Voice/SMS API & SIP trunking competitor to Twilio
thinq 15 45% 45% 45% 45% 45 NAR-focused routing engine
Toku World 7 65% 65% 65% 65% 20 Singapore based CPaaS - expanding in Asia
Twilio 650 65% 60% 55% 50% 1500 Broad Programmable Telecoms Offer - leader
tyntec 80 30% 30% 30% 30% 120 German SMS Aggregator, growing in CPaaS
Unifonic 10 35% 35% 35% 35% 75 Saudi-based CPaaS, close STC relationship
VoIP Innovations (bought Apidaze) 20 35% 35% 35% 35% 30 Wholesale VoIP Telco + CPaaS/Showroom
Vonage (bought Nexmo / Tokbox / NewVoiceMedia / + relevant Vonage sales)400 50% 50% 45% 45% 450 Enterprise Communications Telco
Voxbone 25 30% 30% 30% 30% 90
Default Global fixed and mobile DID provider for many
CPaaS/CCaaS/UCaaS providers, expanding into CPaaS
Voximplant / Zingaya 15 30% 30% 30% 30% 75 Russia based CPaaS, now focused on enterprise services
Voyant 90 30% 30% 30% 30% 150 US CPaaS / UCaaS provider focused on channel sales
Wavecell (8X8) 30 35% 35% 35% 35% 30 Singapore-based SMS CPaaS (video and voice)
Ytel 10 35% 35% 35% 35% 25 Comms for UC/CC. US focused
Zang 10 20% 20% 20% 20% 20 Avaya's CPaaS and Collab app (Avaya Spaces)
Zenvia 15 45% 45% 45% 45% 100 Brazilian business messaging / CPaaS
Ziron 7 35% 35% 35% 35% 20 UK based CPaaS

3. Public Telco CPaaS
Challenge is APIs can be applied to all of a telco's services, becomes tough to measure, focued on categories list above within their API marketplaces that are public (not internal consumption only), no
2018 Revenue2019 Growth2020 Growth2021 Growth 2022 Employees Simple Description
AT&T Marketplace 10 80% 70% 60% 50% 25 Recently launched CPaaS
BDApps (Robi) 10 75% 75% 70% 70% 5 Replication of IdeaMart in Bangladesh
Etisalat 0 5 In the process of launching
IdeaMart Sri Lanka (Dialog) 25 5% 5% 5% 5% 20
Highly successful CPaaS in Sri Lanka (use of templates for
business messaging)
KDDI / Twilio 20 5% 5% 5% 5% 20 6 year old partnership
KPN API Store 1 80% 70% 60% 50% 12 Resell of other CPaaS providers
KT Open API 20 35% 35% 35% 35% 30 Broad base of APIs
LG Open API 15 25% 25% 25% 25% 25 Not sure of status
Orange 40 15% 15% 15% 15% 75 Long established API program, strong in Africa
SK Open API 20 20% 20% 20% 20% 30 Long established broad base of APIs
Telstra Dev 5 50% 40% 30% 20% 15 Messaging and IoT APIs
Turkcell 15 5% 5% 5% 5% 20 CPaaS - more partner than developer focused these days
Vodafone Fiji V-Apps 3 55% 50% 45% 45% 12 Replication of IdeaMart in Fiji
eCPaaS
hSenidMobile 10 35% 35% 35% 35% 40 Enabler of IdeaMart - extending to direct to enterprise

4. CPaaS Enablers (note revenues only for enabled services only)
Any CPaaS provider can package up their platform to act as an enabler - that is make a claim. We focus on those with active deployments.
Kandy (Ribbon) 25 25% 25% 25% 25% 60 cPaaS division within Ribbon, telco focused
hSenidMobile 10 35% 35% 35% 35% 40 Enabler of IdeaMart
Telestax / Restcomm 8 30% 30% 30% 30% 35
Enabler transitioning from opensource project / services to cloud
based enabler
Wazo 2 80% 75% 70% 65% 15 Fork from XiVO, focused CPaaS / UCaaS enabler
FusionPBX 0 2
FreeSWITCH GUI (Graphical User Interface) for PBX, carrier
grade switch, call center server, fax server, voip server, voicemail
server, conference server, voice application server, appliance
framework and more
IMIMobile 8 30% 30% 25% 25% 2000 India based technology and business messaging provider
jitsi.org (8X8) 0 10
JavaScript WebRTC application and can be used for
videoconferencing
Asterisk (Digium/Sangoma) 0 120 Leading open source telecom app server, largest community
Janus (Meetecho) 0 10 lightweight (written in C) WebRTC Gateway
FreePBX (Sangoma) 0 120
open source GUI (graphical user interface) that controls and
manages Asterisk
mediasoup 0 2
Open Source WebRTC SFU for Node.js. mediasoup is a low level
component to build multi-party video conferencing applications.
WebRTC (Google + lots of others) 0 100s
provides browsers and mobile applications with Real-Time
Communications (RTC) capabilities via simple APIs.
2600Hz / Kazoo 3 20% 20% 20% 20% 40 Refocused on CPaaS / UCaaS enabler with Kazoo
SIP3 (SIP3) 0 2 RTC and VoIP traffic monitoring & analysis
HOMER (qxip) 0 10 SIP Capture system and Monitoring Application
openSIPS (OpenSIPS Solutions) 0 3
SIP proxy/server for voice, video, IM, presence (direct competitor
to Kamailio)
Kamailio (Astipo + many more) 0 20
SIP server for building SIP services such as a SIP proxy, SIP
Presence Server, SIP location server (direct competitor to
OpenSIPS)
Medooze 0 2 SIP Video Multiconference Media Server with WebRTC support.
RTPProxy (Sippy Software) 0 12
Sippy RTPproxy is a high-performance software proxy server for
RTP streams that works together with OpenSIPS. Typical
scenarios where RTPproxy needs to be used are NAT traversal or
network bridging
Apigate 10 25% 25% 25% 25% 120 Spin out from Axiata group
MITTO 5 40% 40% 35% 35% 50 Swiss based B2B CPaaS

5. Signalwire / FreeSWITCH 3 100% 90% 80% 70% 20
Telecom application server for real-time communication,
WebRTC, telecommunications, video and Voice over Internet
Protocol (VoIP)
Telenity 5 10% 10% 5% 5% 50 Turkey based VAS /Integrator
elastix (3CX) 0 90
UC wrap including Asterisk, FreePBX, HylaFAX, Openfire and
Postfix.
sipXcom (eZuce) 0 20
Unified communications solution. Plug & play management
system. Installation and configuration is automated and GUI
based, phones from over 10 manufacturers are plug & play
managed including auto-discovery, full configuration, directory
management, speed dial, BLF, and firmware management, and
users are provided with a Web portal for self-service
administration.
VICIdial (VICIDial group) 0 10
VICIdial is an enterprise class, open source, call center suite in
use by many large call centers
Kurento (Twilio) 0 2 WebRTC media server. Bought by Twilio, code still available.
easyRTC (Priologic Software) 0 10
WebRTC toolkit suitable for building highly secure, WebRTC
applications
VoIP Innovations 1 100% 80% 70% 60% 30 Wholesale VoIP Telco + CPaaS/Showroom
Not considered as CPaaS enablers
wgtwo Focused on internal telco functions at the moment
Metaswitch/OpenCloud Focused on internal telco functions, not focused on open source support
Parateum APIs are private between solutions and telco clients
Intelliquent Interconnect, neutral tandem, not CPaaS
Ignoring all the roaming and roaming VAS providers into close telecom ecosystem - public CPaaS.

6. In-App Communications
agora.io 20 85% 80% 70% 60%
Real-time voice and video communication solutions for
education, gaming, telehealth and online recruitment, with a
reseller / distributor model.
Apizee (apiRTC) 7 25% 25% 25% 25%
France based WebRTC based platform to add RTC to apps and
websites
apphitect ? Not sure of status
Applozic 5 25% 25% 25% 25%
Messaging SDK that enables real-time communication for
mobile applications and websites.
ConnectyCube 1 50% 50% 50% 50%
Add WhatsApp-like messaging and videocalling functionality to
your apps
Contus (Mirrorfly revenue) 20 25% 25% 20% 20%
Mirrorfly - Customizable Chat, Video & Voice Integrations For
Any Device
glia 10 45% 45% 40% 35%
Estonia based platform that offers collaborative browsing,
messaging and video chat solutions
Layer 10 35% 35% 35% 30% Focused on in-app rich messaging
Moxtra 12 40% 40% 35% 35% More of a professional services wrap around the RTC core
QuickBlox 10 35% 35% 35% 30%
Q-municate. The open-source, cross platform, video calling and
instant messaging app.
Temasys 10 25% 25% 25% 20%
WebRTC-based platform that helps developers to serve peer-to-
peer and group communication needs for video, audio, chat and
data.
tokbox (Vonage) 15 20% 20% 15% 15%
Platform that allows users to add group video chat features to
their website or mobile app.
Twilio (in-app only) ? Searching for data
Vidyo (bough by Enghouse) 60 15% 20% 15% 15%
Add video communications to apps / web pages - with a vertical
focus on healthcare and finance.
Voxeet (Bought by Dolby Labs) 5 20% 20% 20% 20%
Restart of mobile conferencing solution for private
conversations, business meetings and team collab
Vsee 10 40% 40% 40% 35%
VSee is a telehealth platform that connects patients and
physicians to engage in video calls, screen sharing and
messaging

7. Business Messaging
Partial list, there's 100+ more, many geographically focused on regions / cities
3C Interactive (IMIMobile) 24 35% 35% 35% 35% 100 SMS shortcode business messaging
ActiveCampaign 100 25% 25% 25% 25% 375
Email marketing, expanded into business messaging and
automation
AirMovil 5 45% 45% 45% 45% 15 Mexico based, business messaging projects
aldeamo 12 35% 35% 35% 35% 50 Latim America based business messaging / aggregation
Avidmobile 8 15% 15% 15% 15% 10 Business messaging with reseller model
avochato 4 65% 65% 65% 65% 18 Business messaging for CRM platforms
Callloop 4 5 Business messaging and calling, not sure of current status
Clickatel 60 20% 20% 20% 20% 140 Business Messaging (less CPaaS focus)
Clicksend 5 50% 50% 50% 50% 18 Oz based aggregator for business messaging
ComAPI 18 25% 25% 25% 25% 45
UK based business messaging aggregator - bought 2017 by
dotdigital (adding services beyong aggregation)
Digital Media Interactive (Parateum) 5 25% 25% 25% 25% 20 Aggregator for business messaging
enageSPARK 3 20% 20% 20% 20% 12 Philippines based business communications workflows
EZTexting 25 35% 35% 35% 35% 110 US based business messaging
gupshup 50 50% 50% 50% 50% 120 India based business messaging raised 40+M
HeyWire (SFDC) 55 30% 30% 30% 30% 100 Business Messaging within SFDC
Hustle 20 25% 25% 25% 25% 80 US based business messaging focused on p2p comms
IMIMobile 170 30% 30% 25% 25% 2000 India based technology and business messaging provider
ImpactMobile 10 20% 20% 20% 20% 20 Business messaging, based in Canada, division of IMIMobile
Lime Cellular 25 35% 35% 35% 35% 45 Business messaging reseller / provider
MacroKiosk 30 25% 25% 25% 25% 60 KL based enterprise messaging / payments
Mediaburst / ClockworkSMS 20 45% 45% 45% 45% 15 Manchester based SMS API / Aggregator
MessageMedia 8 20% 20% 20% 20% 40 Australian Business Messaging
messente 6 30% 30% 30% 30% 19 Estonia-nased notifications and security
mGage 30 20% 20% 20% 20% 125 India based multi-channel messaging
Movitext 2 20% 20% 20% 20% 8 Messaging aggregator for Central America
MSG91 5 20% 20% 20% 20% 50 India based SMS aggregator / business messaging
myElefant 10 25% 25% 25% 25% 40 French business messaging / mobile engagement
netsize 50 10% 10% 10% 10% 100 Long estblished French aggregrator / business messaging
OpenMarket 200 15% 15% 15% 15% 300 20 years in business messaging, division of Amdocs
Quiq 8 80% 80% 70% 60% 45 Business messaging platform for call centers
RingRing 5 25% 25% 25% 25% 20 Business communication automation
SendGrid (Twilio) 128 50% 45% 40% 35% 350 Email marketing (spun as email API)
SerwerSMS 5 20% 20% 20% 20% 30 Polish business messaging
Silverstreet 20 35% 35% 35% 35% 80 Business messaging. Focused on Asia, founded in Holland
SimpleTexting 6 40% 40% 40% 40% 20 US based business messaging
Smooch (Zendesk) 5 75% 75% 75% 75% 30 Messaging aggregation for CRM (bought by Zendesk)
SMS-Magic 12 35% 35% 35% 35% 94 India-based business messaging

8. SpringEdge 2 20
India based messaging aggregator (also does voice, not sure of
status)
tatango 6 30% 30% 30% 30% 12 US based business messaging
teckst 5 40% 40% 40% 40% 10 Business messaging for CRM platforms - partners with infobip
Ten Digital Communications 5 45% 45% 45% 45% 10 Intelligent messaging - channel sales model
Text Local (see IMIMobile) 40 see IMIMobile
TextMarks 3 25% 25% 25% 25% 8 US based business messaging
TextPower 2 25% 25% 25% 25% 5 Vertically focused business messaging
The Texting 2 20% 20% 20% 20% 6 SMS aggregation for business messaging
Trumpia 20 40% 40% 40% 40% 80 Business messaging, partners with Vonage
txtNation Not sure if still in business
ValueFrist 60 30% 30% 30% 30% 300 India based business messaging.
Veoo 5 20% 20% 20% 20% 26 business messaging
zipwhip 85 60% 50% 40% 40% 300 Business Messaging

9. Employee Communications
UC / Enterprise Telephony 2018 Revenue2019 Growth2020 Growth2021 Growth2022 Growth
3CX 22 25% 25% 25% 25% Software-based IP PBX for Windows, Linux and the Cloud.
4Com 20 20% 20% 15% 15%
Communications services of the UK’s SME market (45/200 is the
total rev/employee)
8X8 280 20% 20% 20% 20% UCaaS and CCaaS (UCaaS only revenues shown)
Aircall 18 55% 50% 45% 40% Phone system / call center, French start-up
ALU Enterprise / Sipwise 380 0% 0% 0% 0% Old Alcatel Enterprise Division (UC only revenues)
Amazon Chime 25 45% 45% 45% 45% Amazon's move into UCaaS
AMP Telecom 1 20% 20% 20% 20% Small hosted / cloud UC provider
Audiocodes 50 10% 10% 10% 10%
Technology provider across UC/CC and many other comms
product and services (UC related products and services)
Avaya 1200 -10% -10% -10% -10% Top dog in UC - figure includes associated services
Birchills Telecom 1 10% 10% 10% 10% UK business VoIP
Blueface / Star2Star 260 20% 20% 20% 20% US/EU UC provider
Broadview / Windstream Enterprise 220 0% 0% 0% 0% Enterprise division of US telco (UC only rev)
Broadvoice 45 15% 15% 15% 15% US focused enterprise VoIP provider (PBX/UX/CC)
Centile (part of Within Reach) 15 20% 20% 20% 20% EU based hosted UC/PBX provider
Cisco 800 5% 5% 5% 5% Estimate of UC revenues (not published)
Crexendo 15 10% 10% 10% 10% Enterprise comms to US SMB
Dialpad 50 40% 40% 40% 40% Cloud phone system
Digium 30 15% 15% 15% 15% Home of Asterisk, open source phone systems
Dzinga 5 50% 50% 50% 50% European focused UCaaS
EvolveIP 55 25% 25% 25% 25%
Cloud IT and Communications provider (105/400 is total revenue
people)
Flat Planet Phone 1 15% 15% 15% 15% Small 'lifestyle' business
Fuze 125 25% 25% 25% 25% Global UC/CC/Collab provider
Grasshopper (bought by Citrix/GoTo) 30 15% 15% 15% 15% US focused virtual phone systems
Huawei 650 20% 20% 20% 20%
Guestimate as nothing is publshed beyond total enterprise
revenues (Huawei has a vast enterprise portfolio within the
Chinese market)
Intelepeer 180 20% 20% 15% 15%
US focused enterprise communication services, total
revenue/employees (180/250)
Intermedia 125 10% 10% 10% 10%
Global enterprise communications and IT services total rev/emp
(250/1000)
Intulse 3 25% 25% 25% 25% US focused VoIP provider - based in PA
ipcortex (bought by Aerial Direct) inc Aerial Direct #s18 18% 18% 18% 18%
UK focused hybrid enterprise comms solutions provider. Arial is
hosted VoIP and enterprise comms (O2 reseller) ($33M/160)
Jive Communications (bought by Citrix/GoTo)80 35% 35% 35% 35% Jive UC revenues only
Magicjack (for business) 30 18% 18% 18% 18%
US focused consumer and increasingly business focused VoIP
provider (bought Broadsmart) total rev / emp(80/180)

10. Megapath 32 15% 15% 15% 15%
US focused comms, internet and network security total rev/emp
(100/450)
Microsoft 700 20% 20% 20% 20%
Microsoft Teams (hidden in Office Commercial revenues) plu
loads of legacy UC products (does include messaging)
MightyCall 20 15% 15% 15% 15% North America focused virtual phone system
Mission Labs (CircleLoop) 1 200% 150% 100% 80% UK based cloud phone system
Mitel 300 10% 10% 10% 10% Global business phone system supplier
Natterbox 15 35% 35% 35% 35% UK based telephony for Salesforce.com
NEC 230 5% 5% 5% 5% Most of UC revenue is Japan or Japanese companies abroad
net2phone 10 5% 5% 5% 5% US focused Cloud PBX (expanding internationally - Brazil)
Nextiva 140 20% 20% 20% 20% Business phone, CRM, collab + total rev/emp (140/800)
Univoip (OfficeConnect) 25 10% 10% 10% 10% Enterprise comms US focused, some international business
onsip 13 15% 15% 15% 15% Simple cloud based business telephony
ooma 55 18% 18% 18% 18%
North America Consumer and Business VoIP + security service
total rev/emp (140/700)
ottspott 2 25% 25% 25% 25% Phone system for Slack and Gsuite
PanTerra 12 15% 15% 15% 15%
US focused managed enterprise comms, development in India
rev/emp (25/140)
Phone.com 15 20% 20% 20% 20% US SMB focused business VoIP
Pinger / Sideline 12 15% 15% 15% 15% App for messaging and voice
RingCentral 675 33% 32% 31% 30% All in one UC/CC/Collab
ringDNA 14 25% 25% 25% 25% Sales comms + contact center
Ringlogix 5 20% 20% 20% 20% White-label VoIP services
Sangoma 57 30% 30% 30% 30% on-prem and hosted UC (+SBCs)
Simwood 10 50% 50% 50% 50% ITSP Enabler growing out of the UK.
SIPalto 5 35% 35% 35% 35% Internet Telephony and broadband
Sipcentric
Sipwise (bought by ALE) 25 15% 15% 15% 15% UC enabler and service provider
SIP.US 4 25% 25% 25% 25% US focused SIP trunking provider
Star2star / Blueface see above
SureVoIP 5 35% 35% 35% 35% UK focused VoIP provider
SWYX (part of Within Reach) 30 25% 25% 25% 25% European UC / VoIP provider based in Germany
Tango Networks 10 10% 10% 10% 10% US focused UC provider
TelcoSwitch 4 30% 30% 30% 30% UK focused enterprise telephony
Telio (part of NextGenTel) 20 5% 5% 5% 5% Norweigan VoIP provider
Unified Office 8 10% 10% 10% 10% Managed services provider with UC / VoIP
Unify (part of atos) 950 0% 0% 0% 0%
Enterprise UC/Collab/integrator/contact center (UC only
revenues)
univoip (see above)
Versature 15 15% 15% 15% 15% Canadian enterprise telephony
vio:network 4 20% 20% 20% 20% German UC / VoIP provider

11. VirtulPBX 20 20% 20% 20% 20% US focused virtual PBX provider
Voiceworks (part of Within Reach) 35 15% 15% 15% 15%
Dutch ICT solution provider inc UC/VoIP/fixed/broadband
(UC/Telephony only) rev/emp (80/180)
VOIP/STUDIO 12 20% 20% 20% 20% Based in UK, VoIP provider across NA/Australia/Europe
Vonage 600 22% 22% 22% 22%
Global Enterprise VoIP/UC (business rev, but numbers include CC
& CPaaS)
VOXOX 15 15% 15% 15% 15% US focused VoIP / PBX / wholesale telecoms
West (now called Intrado) 350 10% 10% 10% 10%
Big telecom infrastructure conglomerate rev/emp (2.3B/10k) -
rev for UC and hosted VoIP bus
Windstream 550 -2% -2% -2% -2%
UC telco rev/emp $6B/12k (Enterprise business is $3B) and its
own UC product
XOCommunications (part of Verizon) 200 -2% -2% -2% -2% VoIP and hosted PBX in US rev/emp (1.7B/3.5k)
Xuper 10 20% 20% 20% 20% UK based MSP with its own UC Viscon, also resells Microsoft UC
Yeastar 25 10% 10% 10% 10% Global PBX provider, include hosted / cloud through partners
Zoom 15 300% 200% 150% 100%
UC/enterprise telephony revenues of conferencing provider rev /
emp (150M / 2000) - only UC/VoIP revenus
Zultys 15 20% 20% 20% 20% VoIP / UC provider - originated in Australia