Company lists · Data verified August 2026

Top 25 Call center technology vendors based in the United States

Name: Call center technology vendors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 643 companies tracked

There are 643 call center technology vendors headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 26,756 professional contacts across them, including 3,594 with verified work emails and 6,605 with mobile numbers. Atlanta is the largest hub.

This list covers call center technology vendors headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

643Companies

26,756Contacts tracked

3,594Verified emails

6,605Mobile numbers

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The 25 largest call center technology vendors based in the United States

Ranked by team size

Top 25 of 643 call center technology vendors based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Telvista	Dallas, TX	1,001-5,000	3,125	39
2	Infocision Management Corporation	Akron, OH	1,001-5,000	1,773	146
3	Answernet	Horsham, PA	501-1,000	892	148
4	Aspect Software	Boulder, CO	1,001-5,000	877	180
5	Focus Services	Roy, UT	1,001-5,000	793	63
6	Global Contact Services GCS	Yuma, AZ	501-1,000	542	9
7	Eleveo	Franklin, TN	201-500	518	114
8	American Customer Care	Bristol, CT	1,001-5,000	511	40
9	Ansafone Contact Centers	Ocala, FL	501-1,000	429	70
10	The Connection Contact Center	Burnsville, MN	1,001-5,000	353	6
11	Five Star Call Centers	Sioux Falls, SD	1,001-5,000	312	61
12	Kana Software	Santa Clara, CA	501-1,000	306	23
13	Inconcert	Miami, FL	201-500	262	49
14	Convoso	Los Angeles, CA	201-500	246	120
15	Mass Markets	West Des Moines, IA	501-1,000	235	16
16	Customer Direct	Maryland Heights, MO	201-500	233	14
17	Anomaly Squared	Greensboro, NC	201-500	216	20
18	American Support	Jacksonville, FL	501-1,000	191	3
19	Livevox	San Francisco, CA	501-1,000	188	88
20	Signia	Greeley, CO	201-500	182	3
21	Gold Mountain Communications	Springfield, MO	201-500	178	1
22	Callsexperts	New York	501-1,000	170	1
23	Ivox Solutions	Port St Lucie, FL	201-500	157	2
24	Customer Elation	Minneapolis, MN	501-1,000	143	3
25	Vcloud	Las Vegas	501-1,000	137	54

Showing 25 of 643 call center technology vendors based in the United States

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Call center technology vendors based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

AtlantaLargest hub · 21 HQs

6,605Contacts with mobile numbers

11Emails re-verified in last 30 days

Companies by employee count

1-10

149

11-50

227

51-200

152

201-500

501-1,000

1,001-5,000

10001+

Call center technology vendors by metro

Metro	Companies
Call center technology vendors in Atlanta	21
Call center technology vendors in Miami	16
Call center technology vendors in Houston	13
Call center technology vendors in San Diego	11
Call center technology vendors in New York	11
Call center technology vendors in Phoenix	11
Call center technology vendors in Los Angeles	10

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “call center technology vendors”, with match quality audited by blind human judging, and headquartered in the United States.
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: Contact records re-verify on a rolling cadence; 11 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many call center technology vendors are there based in the United States?

There are 643 call center technology vendors headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Telvista, headquartered in Dallas, tops this list with the largest team on record.

Which city has the most call center technology vendors?

Atlanta leads with 21 headquartered companies, followed by Miami (16) and Houston (13).

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 3,594 verified decision-maker contacts tracked across these 643 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.