Company lists · Data refreshed September 2026

Top 25 Omnichannel communication platforms based in the United States

Name: Omnichannel communication platforms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 759 companies tracked

RevenueBase identified 759 omnichannel communication platforms headquartered in the United States as of September 2026 and tracks 123,945 professional contacts across them, including 26,230 with verified work emails and 23,042 with mobile numbers. New York is the largest hub.

This list covers omnichannel communication platforms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

759Companies

123,945Contacts tracked

26,230Verified emails

23,042Mobile numbers

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The 25 largest omnichannel communication platforms based in the United States

Ranked by team size

Top 25 of 759 omnichannel communication platforms based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names omnichannel communication platforms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Sitel GroupIndirect evidence	Miami, FL, United StatesHQ checked Sep 5, 2026	10001+	35,365
	“Foundever™ is a global leader in the customer experience (CX) industry.” Source: company website · checked Sep 5, 2026
2	AVAYAIndirect evidence	Morristown, NJ, United StatesHQ checked Sep 5, 2026	5,001-10,000	10,510
	“At Avaya, we give our customers the freedom to take their business in the directions that benefit them most.” Source: company website · checked Sep 5, 2026
3	RingcentralPartial evidence	Belmont, CA, United StatesHQ checked Sep 5, 2026	5,001-10,000	6,431
	“RingCentral, Inc.(NYSE: RNG) is a global leader in AI–powered customer engagement, delivering an integrated platform for business phone, SMS, contact center, workforce engagement…” Source: company website · checked Sep 5, 2026
4	TwilioPartial evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	5,001-10,000	6,047
	“Today's leading companies trust Twilio's Customer Engagement Platform (CEP) to build direct, personalized relationships with their customers everywhere in the world.” Source: company website · checked Sep 5, 2026
5	Afni, INCIndirect evidence	Bloomington, IL, United StatesHQ checked Sep 5, 2026	10001+	5,553
	“When people reach for their phones, use laptops, or grab their tablets, Afni's contact center teams are there to provide prompt and friendly help.” Source: company website · checked Sep 5, 2026
6	Fusion CXIndirect evidence	Norcross, GA, United StatesHQ checked Sep 5, 2026	10001+	4,785
	“At Fusion CX, we revolutionize customer experience by blending innovative technology and human connection.” Source: company website · checked Sep 5, 2026
7	Harte HanksPartial evidence	Chelmsford, MA, United StatesHQ checked Sep 5, 2026	1,001-5,000	3,901
	“We are The Customer Company®, a global leader in Customer Experience (CX), Omnichannel Marketing, Data Services, Customer Care, Fulfillment, and Logistics.” Source: company website · checked Sep 5, 2026
8	Five9Indirect evidence	San Ramon, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,584
	“Five9 provides a comprehensive suite of CX solutions, powered by Five9 Genius AI, to elevate customer experiences that deliver better business outcomes in the era of The New CX.” Source: company website · checked Sep 5, 2026
9	DiversifiedIndirect evidence	Plano, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,523
	“At Diversified, we leverage the best in technology and ongoing advisory services to transform businesses.” Source: company website · checked Sep 5, 2026
10	8x8Indirect evidence	Campbell, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,444
	“8x8, Inc.(NASDAQ: EGHT) believes that CX limits were meant to be shattered.” Source: company website · checked Sep 5, 2026
11	Liveops, INCIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	n/a	2,026
	“Human-Led, Tech-Powered Customer Service For over 25 years, Liveops has redefined customer support by combining technology with real human connection.” Source: company website · checked Sep 5, 2026
12	Infocision Management CorporationIndirect evidence	Akron, OH, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,764
	“InfoCision is an award-winning contact center partner trusted by leading brands for over 40 years.” Source: company website · checked Sep 5, 2026
13	Support Services GroupIndirect evidence	Waco, TX, United StatesHQ checked Sep 5, 2026	5,001-10,000	1,710
	“Support Services Group (SSG) helps businesses accelerate growth and earn customers for life through high-touch, outsourced engagement center services.” Source: company website · checked Sep 5, 2026
14	NextivaPartial evidence	Scottsdale, AZ, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,638
	“Build amazing customer experiences with Nextiva’s AI-powered platform.” Source: company website · checked Sep 5, 2026
15	DialpadStrong evidence	San Ramon, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,473
	“Dialpad is the leading AI-powered communications intelligence platform creating human-first, AI-enhanced solutions that will drive the next wave of how businesses communicate with…” Source: company website · checked Sep 5, 2026
16	Datamark, INCIndirect evidence	El Paso, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,418
	“DATAMARK Inc, a provider of omni-channel contact centers and business process outsourcing (BPO) services since 1989, employs more than at our facilities in the United States…” Source: company website · checked Sep 5, 2026
17	AttentiveIndirect evidence	New York, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,287
	“Attentive® knows personalized customer experiences require both powerful technology and the right people behind it.” Source: company website · checked Sep 5, 2026
18	IntegraIndirect evidence	Vancouver, WA, United StatesHQ checked Sep 5, 2026	501-1,000	1,133
	“Integra is Allstream.” Source: company website · checked Sep 5, 2026
19	Bandwidth INCStrong evidence	Raleigh, NC, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,128
	“Bandwidth is the universal communications platform that simplifies how businesses deliver integrated global experiences.” Source: company website · checked Sep 5, 2026
20	AircallPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	501-1,000	804
	“The collaborative, AI-powered platform for customer conversations.” Source: company website · checked Sep 5, 2026
21	KhorosIndirect evidence	Austin, TX, United StatesHQ checked Sep 5, 2026	501-1,000	763
	“Khoros' award-winning enterprise software makes it easier for complex brands to engage with customers at scale across digital, social, and brand-owned channels.” Source: company website · checked Sep 5, 2026
22	IntradoIndirect evidence	Omaha, NE, United StatesHQ checked Sep 5, 2026	5,001-10,000	745
	“West (formerly Intrado Corporation) solutions connect people and organizations at the right time and in the right ways, making those mission-critical connections more relevant…” Source: company website · checked Sep 5, 2026
23	Clearsource BPOIndirect evidence	Sandy, UT, United StatesHQ checked Sep 5, 2026	1,001-5,000	708
	“ClearSource at its core is a customer experience company.” Source: company website · checked Sep 5, 2026
24	IntelogixIndirect evidence	Park City, UT, United StatesHQ checked Sep 5, 2026	5,001-10,000	657
	“We are a trusted leader in providing integrated solutions, leveraging cutting-edge technology to deliver exceptional customer experiences.” Source: company website · checked Sep 5, 2026
25	AlianzaPartial evidence	Pleasant Grove, UT, United StatesHQ checked Sep 5, 2026	501-1,000	606
	“Empowering service provider growth with the world’s most trusted Intelligent Communications Fabric.” Source: company website · checked Sep 5, 2026

Showing 25 of 759 omnichannel communication platforms based in the United States

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Omnichannel communication platforms based in the United States at a glance

As of Sep 5, 2026

11-50Median size (employees)

New YorkLargest hub · 39 HQs

23,042Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

205

11-50

301

51-200

146

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Verified emails by last verification

0–30

24,148

31–60

1,619

61–90

90–180

180+

424

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among omnichannel communication platforms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “omnichannel communication platforms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among omnichannel communication platforms, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 26,230 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 5, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Omnichannel communication platforms by metro

Frequently asked

How many omnichannel communication platforms are there based in the United States?

RevenueBase identified 759 omnichannel communication platforms headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Sitel Group, headquartered in Miami, tops this list with the largest team on record.

Which city has the most omnichannel communication platforms?

New York leads with 39 headquartered companies, followed by Miami (30) and San Francisco (30).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 26,230 verified decision-maker contacts tracked across these 759 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.