Company lists · Data refreshed August 2026

Top 25 Cloud call center software based in the United States

Name: Cloud call center software based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Aug 31, 2026 585 companies tracked

RevenueBase identified 585 cloud call center software headquartered in the United States as of August 2026 and tracks 30,716 professional contacts across them, including 9,814 with verified work emails and 9,137 with mobile numbers. San Francisco is the largest hub.

This list covers cloud call center software 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 August 31, 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 RevenueBase Smart Search rating on every row Refreshed Aug 31, 2026 86% judged on-target in blind review

585Companies

30,716Contacts tracked

9,814Verified emails

9,137Mobile numbers

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The 25 largest cloud call center software based in the United States

Ranked by team size

Top 25 of 585 cloud call center software based in the United States, ranked by team size, largest first. Data refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to cloud call center software: 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	Vonage	Indirect evidence	Holmdel, NJ, United States	1,001-5,000	3,512 contacts →
	Indirect evidence “We’re making communications more flexible, intelligent, and personal, to help enterprises the world over stay ahead.” Source: RevenueBase Database · checked Aug 31, 2026
2	Five9	Indirect evidence	San Ramon, CA, United States	1,001-5,000	2,578 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 Aug 31, 2026
3	GOTO	Partial evidence	Boston, MA, United States	1,001-5,000	2,325 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 Aug 31, 2026
4	Infocision Management Corporation	Partial evidence	Akron, OH, United States	1,001-5,000	1,773 contacts →
	Partial evidence “InfoCision is an award-winning contact center partner trusted by leading brands for over 40 years.” Source: RevenueBase Database · checked Aug 31, 2026
5	Dialamerica	Indirect evidence	Mahwah, NJ, United States	1,001-5,000	1,537 contacts →
	Indirect evidence “DialAmerica is now Aucera.” Source: RevenueBase Database · checked Aug 31, 2026
6	Intermedia Intelligent Communications	Partial evidence	Sunnyvale, CA, United States	1,001-5,000	1,251 contacts →
	Partial evidence “Intermedia is the cloud communications company that helps over businesses connect better, from wherever, through our AI-powered platform that includes voice, video conferencing…” Source: RevenueBase Database · checked Aug 31, 2026
7	Answernet	Indirect evidence	Horsham, PA, United States	501-1,000	892 contacts →
	Indirect evidence “If you are interested in growing your business or increasing efficiency, AnswerNet has the expertise, technology, and people to help you take your company to new heights!” Source: RevenueBase Database · checked Aug 31, 2026
8	The Call Center Doctors	Strong evidence	Houston, TX, United States	501-1,000	557 contacts →
	Strong evidence “We build fully managed call centers: Software build outs Hiring Training Integrations” Source: RevenueBase Database · checked Aug 31, 2026
9	Global Response	Partial evidence	Margate, FL, United States	1,001-5,000	489 contacts →
	Partial evidence “Global Response is The Brand Contact Center.” Source: RevenueBase Database · checked Aug 31, 2026
10	Activus Connect	Indirect evidence	Orlando, FL, United States	501-1,000	480 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 Aug 31, 2026
11	Ansafone Contact Centers	Partial evidence	Ocala, FL, United States	501-1,000	429 contacts →
	Partial 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 Aug 31, 2026
12	phone.com	Partial evidence	Poway, CA, United States	201-500	396 contacts →
	Partial evidence “Founded in 2008 by veteran telecommunication entrepreneurs, Phone.com provides over businesses with comprehensive, flexible, and reliable cloud-based communication and…” Source: RevenueBase Database · checked Aug 31, 2026
13	Five Star Call Centers	Strong evidence	Sioux Falls, SD, United States	1,001-5,000	312 contacts →
	Strong evidence “Five Star Call Centers is a onshore and nearshore contact center outsourcer where we deliver outrageously amazing customer experiences for our clients and their customers.” Source: RevenueBase Database · checked Aug 31, 2026
14	Kana Software	Indirect evidence	Santa Clara, CA, United States	501-1,000	306 contacts →
	Indirect evidence “KANA understands the value of great Customer Service experiences.” Source: RevenueBase Database · checked Aug 31, 2026
15	Genesys Interactive Intelligence	Indirect evidence	Daly City, CA, United States	1,001-5,000	276 contacts →
	Indirect evidence “Genesys acquired Interactive Intelligence in December 2016.” Source: RevenueBase Database · checked Aug 31, 2026
16	Kustomer	Partial evidence	New York, NY, United States	201-500	263 contacts →
	Partial evidence “Kustomer is the Intelligent Customer Experience Platform empowering brands to put customers at the center of every interaction.” Source: RevenueBase Database · checked Aug 31, 2026
17	Convoso	Partial evidence	Los Angeles, CA, United States	201-500	246 contacts →
	Partial evidence “Convoso is an AI-powered contact center platform built for revenue teams and customer engagement organizations expanding into outbound growth.” Source: RevenueBase Database · checked Aug 31, 2026
18	Netomi	Indirect evidence	San Mateo, CA, United States	201-500	237 contacts →
	Indirect evidence “Netomi is the enterprise agentic CX platform built for the world's most complex environments.” Source: RevenueBase Database · checked Aug 31, 2026
19	Mass Markets	Partial evidence	West Des Moines, IA, United States	501-1,000	235 contacts →
	Partial evidence “CONTACT CENTER SERVICES INNOVATIVE, HIGH-PERFORMANCE SOLUTIONS THAT WORK Mass Markets executes domestic omni-channel, inbound and outbound contact center services on behalf of…” Source: RevenueBase Database · checked Aug 31, 2026
20	Livevox	Strong evidence	San Francisco, CA, United States	501-1,000	188 contacts →
	Strong evidence “LiveVox (Nasdaq: LVOX) is a proven cloud CCaaS platform that helps business leaders redefine customer engagement and transform their contact center’s performance.” Source: RevenueBase Database · checked Aug 31, 2026
21	Voip Office	Partial evidence	Troy, MI, United States	201-500	165 contacts →
	Partial evidence “VoIP Office, a leading provider of Cloud based communications, makes it affordable and easy to connect to anyone, anywhere in the world.” Source: RevenueBase Database · checked Aug 31, 2026
22	Premiere Response	Partial evidence	North Bergen, NJ, United States	1,001-5,000	152 contacts →
	Partial evidence “At Premiere Response, we deliver exceptional, omnichannel contact center solutions, infusing your brand’s promise into every customer interaction.” Source: RevenueBase Database · checked Aug 31, 2026
23	Vcloud	Strong evidence	Las Vegas, United States	501-1,000	137 contacts →
	Strong evidence “VCloud Interactive: Redefining Contact Center and Communications with AI and Cloud Technology VCloud Interactive, a subsidiary of VoiceCloud LLC, has been at the forefront of…” Source: RevenueBase Database · checked Aug 31, 2026
24	Noble Systems	Partial evidence	Atlanta, GA, United States	501-1,000	132 contacts →
	Partial evidence “On May 10, 2021 Aspect Software and Noble Systems merged to form Alvaria.” Source: RevenueBase Database · checked Aug 31, 2026
25	Opsify	Indirect evidence	Kansas City, MO, United States	501-1,000	118 contacts →
	Indirect evidence “At OPSIFY we create customized solutions to meet your specific business needs.” Source: RevenueBase Database · checked Aug 31, 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 call center software. 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 call center software.
Partial evidence: Its own public description names part of cloud call center software, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cloud call center software. 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 585 cloud call center software based in the United States

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Cloud call center software based in the United States at a glance

As of Aug 31, 2026

32.0%Verified-email coverage

29.7%Mobile-number coverage

52.5Average contacts per company

11-50Median size (employees)

2.7%Largest-city concentration · San Francisco

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

137

11-50

239

51-200

128

201-500

501-1,000

1,001-5,000

10001+

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 call center software, 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 call center software”. 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 call center software), 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 call center software, 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, 9,814 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 August 31, 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 call center software, 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 call center software are there based in the United States?

RevenueBase identified 585 cloud call center software headquartered in the United States as of August 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?

Vonage, headquartered in Holmdel, tops this list with the largest team on record.

Which city has the most cloud call center software?

San Francisco leads with 16 headquartered companies, followed by New York (15) and Atlanta (15).

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 9,814 verified decision-maker contacts tracked across these 585 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 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.