Company lists · Data refreshed September 2026

Top 25 Cloud contact center platforms based in the United States

Name: Cloud contact center 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 27, 2026 682 companies tracked

RevenueBase identified 682 cloud contact center platforms headquartered in the United States as of September 2026 and tracks 74,880 professional contacts across them, including 18,071 with verified work emails. Atlanta is the largest hub.

This list covers cloud contact center 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 27, 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 27, 2026 86% judged on-target in blind review

682Companies

74,880Contacts tracked

18,071Verified emails

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The 25 largest cloud contact center platforms based in the United States

Ranked by team size

Top 25 of 682 cloud contact center platforms based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to cloud contact center 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	Ringcentral	Strong evidence	Belmont, CA, United StatesHQ checked Sep 27, 2026	5,001-10,000	6,431 contacts →
	Strong 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 27, 2026
2	Afni, INC	Strong evidence	Bloomington, IL, United StatesHQ checked Sep 27, 2026	10001+	5,553 contacts →
	Strong 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 27, 2026
3	Call Center Services International	Strong evidence	San Diego, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	4,561 contacts →
	Strong evidence “CCSI specializes in high‑performance, cost‑efficient contact center solutions supported by a world‑class bilingual workforce and state‑of‑the‑art infrastructure in Mexico.” Source: RevenueBase Database · checked Sep 27, 2026
4	Continuum Global Solutions	Strong evidence	Dallas, TX, United StatesHQ checked Sep 27, 2026	5,001-10,000	4,342 contacts →
	Strong evidence “With a fresh name and decades of contact center expertise, we’re dedicated to collaborative partnerships, understanding your unique needs, and tailoring solutions for an enhanced…” Source: RevenueBase Database · checked Sep 27, 2026
5	Vonage	Indirect evidence	Holmdel, NJ, United StatesHQ checked Sep 27, 2026	1,001-5,000	3,429 contacts →
	Indirect evidence “We’re making communications more flexible, intelligent, and personal, to help enterprises the world over stay ahead.” Source: RevenueBase Database · checked Sep 27, 2026
6	Telvista	Partial evidence	Dallas, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	3,122 contacts →
	Partial evidence “Email: info@Telvista.com Telvista is a premier provider of contact solutions that drive customer loyalty and create competitive advantage for our clients.” Source: RevenueBase Database · checked Sep 27, 2026
7	Five9	Indirect evidence	San Ramon, CA, United StatesHQ checked Sep 27, 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 27, 2026
8	8x8	Indirect evidence	Campbell, CA, United StatesHQ checked Sep 27, 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 27, 2026
9	GOTO	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,320 contacts →
	Partial evidence “As the leader in cloud communications and IT, GoTo addresses real-world challenges with practical innovations and a customer-first mindset.” Source: RevenueBase Database · checked Sep 27, 2026
10	Liveops, INC	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 27, 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 27, 2026
11	Infocision Management Corporation	Strong evidence	Akron, OH, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,764 contacts →
	Strong evidence “InfoCision is an award-winning contact center partner trusted by leading brands for over 40 years.” Source: RevenueBase Database · checked Sep 27, 2026
12	Km2 Solutions	Indirect evidence	Boca Raton, FL, United StatesHQ checked Sep 27, 2026	5,001-10,000	1,741 contacts →
	Indirect evidence “Award-winning outsourcing partner with two decades of experience operating an exclusively nearshore strategy that delivers better performance, close to home, and at a lower cost.” Source: RevenueBase Database · checked Sep 27, 2026
13	Support Services Group	Partial evidence	Waco, TX, United StatesHQ checked Sep 27, 2026	5,001-10,000	1,710 contacts →
	Partial 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 27, 2026
14	Dialamerica	Indirect evidence	Mahwah, NJ, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,536 contacts →
	Indirect evidence “DialAmerica is now Aucera.” Source: RevenueBase Database · checked Sep 27, 2026
15	Datamark, INC	Strong evidence	El Paso, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,418 contacts →
	Strong 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 27, 2026
16	Nexrep, LLC	Strong evidence	Portland, ME, United StatesHQ checked Sep 27, 2026	201-500	865 contacts →
	Strong evidence “NexRep is a leader in virtual contact center solutions, with more than 100 years of combined contact center leadership.” Source: RevenueBase Database · checked Sep 27, 2026
17	Aircall	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	501-1,000	804 contacts →
	Partial evidence “The collaborative, AI-powered platform for customer conversations.” Source: RevenueBase Database · checked Sep 27, 2026
18	Clearsource BPO	Indirect evidence	Sandy, UT, United StatesHQ checked Sep 27, 2026	1,001-5,000	708 contacts →
	Indirect evidence “ClearSource at its core is a customer experience company.” Source: RevenueBase Database · checked Sep 27, 2026
19	Call Center Studio	Strong evidence	Chicago, IL, United StatesHQ checked Sep 27, 2026	51-200	567 contacts →
	Strong evidence “Call Center Studio is an AI-powered, cloud-based contact center software that redefines how businesses engage with their customers.” Source: RevenueBase Database · checked Sep 27, 2026
20	Global Contact Services GCS	Indirect evidence	Salisbury, NC, United StatesHQ checked Sep 27, 2026	501-1,000	542 contacts →
	Indirect evidence “We are customer service experts.” Source: RevenueBase Database · checked Sep 27, 2026
21	Contactus Communications	Partial evidence	Columbus, OH, United StatesHQ checked Sep 27, 2026	1,001-5,000	515 contacts →
	Partial evidence “ContactUs Communications is a U.S.” Source: RevenueBase Database · checked Sep 27, 2026
22	Global Response	Strong evidence	Margate, FL, United StatesHQ checked Sep 27, 2026	1,001-5,000	487 contacts →
	Strong evidence “Global Response is The Brand Contact Center.” Source: RevenueBase Database · checked Sep 27, 2026
23	Activus Connect	Indirect evidence	Orlando, FL, United StatesHQ checked Sep 27, 2026	501-1,000	479 contacts →
	Indirect evidence “Activus Connect is a premium provider of Customer Experience Outsourced Solutions, operating across the Continental US & Puerto Rico.” Source: RevenueBase Database · checked Sep 27, 2026
24	Alvaria CX	Strong evidence	Atlanta, GA, United StatesHQ checked Sep 27, 2026	1,001-5,000	478 contacts →
	Strong evidence “Alvaria CX, the global leader in contact center solutions, emerged from the 2021 merger of Noble Systems and Aspect, bringing over 50 years of CX innovation.” Source: RevenueBase Database · checked Sep 27, 2026
25	Ansafone Contact Centers	Strong evidence	Santa Ana, CA, United StatesHQ checked Sep 27, 2026	501-1,000	431 contacts →
	Strong evidence “About : Ansafone is the leading outsourced contact center solution provider for companies in the US and Canada and maintains international alliances for global reach.” Source: RevenueBase Database · checked Sep 27, 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: cloud contact center 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 cloud contact center platforms.
Partial evidence: Its own public description names part of cloud contact center platforms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cloud contact center 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 682 cloud contact center platforms based in the United States

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Cloud contact center platforms based in the United States at a glance

As of Sep 27, 2026

24.1%Verified-email coverage

109.8Average contacts per company

11-50Median size (employees)

3.8%Largest-city concentration · Atlanta

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

136

11-50

242

51-200

157

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 682 companies.

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 cloud contact center 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 “cloud contact center 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 cloud contact center 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 cloud contact center 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, 18,071 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 27, 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.

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 cloud contact center 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 cloud contact center platforms are there based in the United States?

RevenueBase identified 682 cloud contact center 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?

Ringcentral, headquartered in Belmont, tops this list with the largest team on record.

Which city has the most cloud contact center platforms?

Atlanta leads with 26 headquartered companies, followed by Miami (19) and New York (19).

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 18,071 verified decision-maker contacts tracked across these 682 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 27, 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.