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, its RevenueBase Smart Search rating, 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 Smart Search, 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 RevenueBase Smart Search rating 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. RevenueBase Smart Search rates how each company's information relates to omnichannel communication platforms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Sitel Group	Indirect evidence	Miami, FL, United StatesHQ checked Sep 5, 2026	10001+	35,365 contacts →
	Indirect evidence “Foundever™ is a global leader in the customer experience (CX) industry.” Source: RevenueBase Database · checked Sep 5, 2026
2	AVAYA	Indirect evidence	Morristown, NJ, United StatesHQ checked Sep 5, 2026	5,001-10,000	10,510 contacts →
	Indirect evidence “At Avaya, we give our customers the freedom to take their business in the directions that benefit them most.” Source: RevenueBase Database · checked Sep 5, 2026
3	Ringcentral	Partial evidence	Belmont, CA, United StatesHQ checked Sep 5, 2026	5,001-10,000	6,431 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 5, 2026
4	Twilio	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	5,001-10,000	6,047 contacts →
	Partial evidence “Today's leading companies trust Twilio's Customer Engagement Platform (CEP) to build direct, personalized relationships with their customers everywhere in the world.” Source: RevenueBase Database · checked Sep 5, 2026
5	Afni, INC	Indirect evidence	Bloomington, IL, United StatesHQ checked Sep 5, 2026	10001+	5,553 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
6	Fusion CX	Indirect evidence	Norcross, GA, United StatesHQ checked Sep 5, 2026	10001+	4,785 contacts →
	Indirect evidence “At Fusion CX, we revolutionize customer experience by blending innovative technology and human connection.” Source: RevenueBase Database · checked Sep 5, 2026
7	Harte Hanks	Partial evidence	Chelmsford, MA, United StatesHQ checked Sep 5, 2026	1,001-5,000	3,901 contacts →
	Partial evidence “We are The Customer Company®, a global leader in Customer Experience (CX), Omnichannel Marketing, Data Services, Customer Care, Fulfillment, and Logistics.” Source: RevenueBase Database · checked Sep 5, 2026
8	Five9	Indirect evidence	San Ramon, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,584 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
9	Diversified	Indirect evidence	Plano, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,523 contacts →
	Indirect evidence “At Diversified, we leverage the best in technology and ongoing advisory services to transform businesses.” Source: RevenueBase Database · checked Sep 5, 2026
10	8x8	Indirect evidence	Campbell, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,444 contacts →
	Indirect evidence “8x8, Inc.(NASDAQ: EGHT) believes that CX limits were meant to be shattered.” Source: RevenueBase Database · checked Sep 5, 2026
11	Liveops, INC	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	n/a	2,026 contacts →
	Indirect evidence “Human-Led, Tech-Powered Customer Service For over 25 years, Liveops has redefined customer support by combining technology with real human connection.” Source: RevenueBase Database · checked Sep 5, 2026
12	Infocision Management Corporation	Indirect evidence	Akron, OH, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,764 contacts →
	Indirect evidence “InfoCision is an award-winning contact center partner trusted by leading brands for over 40 years.” Source: RevenueBase Database · checked Sep 5, 2026
13	Support Services Group	Indirect evidence	Waco, TX, United StatesHQ checked Sep 5, 2026	5,001-10,000	1,710 contacts →
	Indirect evidence “Support Services Group (SSG) helps businesses accelerate growth and earn customers for life through high-touch, outsourced engagement center services.” Source: RevenueBase Database · checked Sep 5, 2026
14	Nextiva	Partial evidence	Scottsdale, AZ, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,638 contacts →
	Partial evidence “Build amazing customer experiences with Nextiva’s AI-powered platform.” Source: RevenueBase Database · checked Sep 5, 2026
15	Dialpad	Strong evidence	San Ramon, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,473 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 5, 2026
16	Datamark, INC	Indirect evidence	El Paso, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,418 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
17	Attentive	Indirect evidence	New York, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,287 contacts →
	Indirect evidence “Attentive® knows personalized customer experiences require both powerful technology and the right people behind it.” Source: RevenueBase Database · checked Sep 5, 2026
18	Integra	Indirect evidence	Vancouver, WA, United StatesHQ checked Sep 5, 2026	501-1,000	1,133 contacts →
	Indirect evidence “Integra is Allstream.” Source: RevenueBase Database · checked Sep 5, 2026
19	Bandwidth INC	Strong evidence	Raleigh, NC, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,128 contacts →
	Strong evidence “Bandwidth is the universal communications platform that simplifies how businesses deliver integrated global experiences.” Source: RevenueBase Database · checked Sep 5, 2026
20	Aircall	Partial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	501-1,000	804 contacts →
	Partial evidence “The collaborative, AI-powered platform for customer conversations.” Source: RevenueBase Database · checked Sep 5, 2026
21	Khoros	Indirect evidence	Austin, TX, United StatesHQ checked Sep 5, 2026	501-1,000	763 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
22	Intrado	Indirect evidence	Omaha, NE, United StatesHQ checked Sep 5, 2026	5,001-10,000	745 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
23	Clearsource BPO	Indirect evidence	Sandy, UT, United StatesHQ checked Sep 5, 2026	1,001-5,000	708 contacts →
	Indirect evidence “ClearSource at its core is a customer experience company.” Source: RevenueBase Database · checked Sep 5, 2026
24	Intelogix	Indirect evidence	Park City, UT, United StatesHQ checked Sep 5, 2026	5,001-10,000	657 contacts →
	Indirect evidence “We are a trusted leader in providing integrated solutions, leveraging cutting-edge technology to deliver exceptional customer experiences.” Source: RevenueBase Database · checked Sep 5, 2026
25	Alianza	Partial evidence	Pleasant Grove, UT, United StatesHQ checked Sep 5, 2026	501-1,000	606 contacts →
	Partial evidence “Empowering service provider growth with the world’s most trusted Intelligent Communications Fabric.” Source: RevenueBase Database · checked Sep 5, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: omnichannel communication platforms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names omnichannel communication platforms.
Partial evidence: Its own public description names part of omnichannel communication platforms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name omnichannel communication platforms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

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

21.2%Verified-email coverage

18.6%Mobile-number coverage

163.3Average contacts per company

11-50Median size (employees)

5.1%Largest-city concentration · New York

Sep 5, 2026Page data 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+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

24,1480–30

1,61931–60

2261–90

1790–180

424180+

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 RevenueBase Smart Search 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 Smart Search, 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.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names omnichannel communication platforms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
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 its RevenueBase Smart Search 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

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names omnichannel communication platforms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

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 Smart Search, 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.