Company lists · Data refreshed September 2026

Top 25 Customer service platform companies based in the United States

Name: Customer service platform companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 692 companies tracked

RevenueBase identified 692 customer service platform companies headquartered in the United States as of September 2026 and tracks 89,527 professional contacts across them, including 23,987 with verified work emails. New York is the largest hub.

This list covers customer service platform companies 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 28, 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 28, 2026 86% judged on-target in blind review

692Companies

89,527Contacts tracked

23,987Verified emails

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The 25 largest customer service platform companies based in the United States

Ranked by team size

Top 25 of 692 customer service platform companies based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to customer service platform companies: 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 28, 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 28, 2026
2	Twilio	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	5,001-10,000	6,047 contacts →
	Strong 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 28, 2026
3	CSG	Partial evidence	Englewood, CO, United StatesHQ checked Sep 28, 2026	5,001-10,000	5,874 contacts →
	Partial evidence “CSG is a leader in innovative customer engagement, revenue management and payments solutions that make ordinary customer experiences extraordinary.” Source: RevenueBase Database · checked Sep 28, 2026
4	Fusion CX	Partial evidence	Norcross, GA, United StatesHQ checked Sep 28, 2026	10001+	4,785 contacts →
	Partial evidence “At Fusion CX, we revolutionize customer experience by blending innovative technology and human connection.” Source: RevenueBase Database · checked Sep 28, 2026
5	Telvista	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 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 28, 2026
6	Etech Global Services	Partial evidence	Nacogdoches, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,964 contacts →
	Partial evidence “Etech Global Services delivers customer experience solutions and proprietary AI technology to Fortune 500 companies across telecommunications, healthcare, financial services, and…” Source: RevenueBase Database · checked Sep 28, 2026
7	Klaviyo	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,789 contacts →
	Indirect evidence “Klaviyo (NYSE: KVYO) is the autonomous B2C CRM.” Source: RevenueBase Database · checked Sep 28, 2026
8	Five9	Partial evidence	San Ramon, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,584 contacts →
	Partial 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 28, 2026
9	8x8	Indirect evidence	Campbell, CA, United StatesHQ checked Sep 28, 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 28, 2026
10	Liveops, INC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	n/a	2,026 contacts →
	Partial 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 28, 2026
11	Supportninja	Partial evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,711 contacts →
	Partial evidence “SupportNinja provides customer experience and back-office support services for tech companies and startups around the world.” Source: RevenueBase Database · checked Sep 28, 2026
12	Support Services Group	Partial evidence	Waco, TX, United StatesHQ checked Sep 28, 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 28, 2026
13	Nextiva	Strong evidence	Scottsdale, AZ, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,638 contacts →
	Strong evidence “Build amazing customer experiences with Nextiva’s AI-powered platform.” Source: RevenueBase Database · checked Sep 28, 2026
14	Dialamerica	Indirect evidence	Mahwah, NJ, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,536 contacts →
	Indirect evidence “DialAmerica is now Aucera.” Source: RevenueBase Database · checked Sep 28, 2026
15	Intercom	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,444 contacts →
	Partial evidence “We’re Intercom, the AI customer service company helping businesses deliver incredible customer experiences at scale.” Source: RevenueBase Database · checked Sep 28, 2026
16	Datamark, INC	Indirect evidence	El Paso, TX, United StatesHQ checked Sep 28, 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 28, 2026
17	Talkdesk	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,316 contacts →
	Strong evidence “Talkdesk® is leading a new era in customer experience with Customer Experience Automation (CXA)-a new category and platform designed to automate the full complexity of modern…” Source: RevenueBase Database · checked Sep 28, 2026
18	Attentive	Partial evidence	New York, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,287 contacts →
	Partial evidence “Attentive® knows personalized customer experiences require both powerful technology and the right people behind it.” Source: RevenueBase Database · checked Sep 28, 2026
19	Broadpath	Indirect evidence	Tucson, AZ, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,275 contacts →
	Indirect evidence “BroadPath provides transformational outsourcing and managed services powered by our one-of-a-kind, 100% remote business model.” Source: RevenueBase Database · checked Sep 28, 2026
20	Unifycx	Strong evidence	Louisville, KY, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,270 contacts →
	Strong evidence “UnifyCX is a future-ready, next-generation customer experience platform that fuses the best of human expertise with advanced AI technology.” Source: RevenueBase Database · checked Sep 28, 2026
21	Partnerhero	Indirect evidence	Boise, ID, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,174 contacts →
	Indirect evidence “The First AI-Native Contact Center.” Source: RevenueBase Database · checked Sep 28, 2026
22	Aircall	Strong evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	804 contacts →
	Strong evidence “The collaborative, AI-powered platform for customer conversations.” Source: RevenueBase Database · checked Sep 28, 2026
23	FCR	Indirect evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	791 contacts →
	Indirect evidence “TTEC Agility - Nestled within TTEC’s 40 years of experience lies TTEC Agility.” Source: RevenueBase Database · checked Sep 28, 2026
24	Khoros	Partial evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	501-1,000	763 contacts →
	Partial 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 28, 2026
25	Talentpop	Partial evidence	Costa Mesa, CA, United StatesHQ checked Sep 28, 2026	501-1,000	747 contacts →
	Partial evidence “TalentPop is a leading Customer Service Management Agency that works with over 500 fast-growing E-Commerce brands to revolutionize their customer service and turn customer service…” Source: RevenueBase Database · checked Sep 28, 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: customer service platform companies. 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 customer service platform companies.
Partial evidence: Its own public description names part of customer service platform companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name customer service platform companies. 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 692 customer service platform companies based in the United States

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Customer service platform companies based in the United States at a glance

As of Sep 28, 2026

26.8%Verified-email coverage

129.4Average contacts per company

11-50Median size (employees)

6.2%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

194

11-50

249

51-200

132

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 692 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 customer service platform companies, 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 “customer service platform companies”. 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 customer service platform companies), 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 customer service platform companies, 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, 23,987 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 28, 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.

Customer service platform companies 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 customer service platform companies, 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 customer service platform companies are there based in the United States?

RevenueBase identified 692 customer service platform companies 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 customer service platform companies?

New York leads with 43 headquartered companies, followed by San Francisco (42) and Austin (25).

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 23,987 verified decision-maker contacts tracked across these 692 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 28, 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.