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Company lists · Data verified August 2026

Top 25 Call center companies based in the United States

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 781 companies tracked

There are 781 call center companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 47,370 professional contacts across them, including 4,032 with verified work emails and 9,936 with mobile numbers. Miami is the largest hub.

This list covers call center 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. Data current as of August 28, 2026.

781Companies
47,370Contacts tracked
4,032Verified emails
9,936Mobile numbers
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The 25 largest call center companies based in the United States

Ranked by team size
Top 25 of 781 call center companies 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.
#CompanyHQEmployeesContactsVerified emails
1TelvistaDallas, TX1,001-5,0003,12539
2Advanced Call Center Technologies, LLCJohnson City, TN5,001-10,0002,779282
3CAT Technologies ArgentinaMiami, FL1,001-5,0002,211323
4Infocision Management CorporationAkron, OH1,001-5,0001,773146
5SupportninjaAustin, TX1,001-5,0001,695547
6DialamericaMahwah, NJ1,001-5,0001,53750
7RDI CorporationCincinnati, OH1,001-5,0001,51238
8Senture, LLCLondon1,001-5,0001,477198
9Valor GlobalScottsdale, AZ1,001-5,0001,04472
10MCILas Cruces, NM5,001-10,00097452
11Inktel Contact Center SolutionsDoral, FL1,001-5,000905113
12AnswernetHorsham, PA501-1,000892148
13CBE CompaniesWaterloo, IA1,001-5,000838117
14Focus ServicesRoy, UT1,001-5,00079363
15Sequential Technology InternationalBethlehem1,001-5,00076243
16TelenetworkSan Marcos, TX1,001-5,00056746
17Global Contact Services GCSYuma, AZ501-1,0005429
18Contactus CommunicationsColumbus, OH1,001-5,00051335
19Coast Professional, INCWest Monroe, LA501-1,00050898
20OnesupportSan Marcos, TX1,001-5,000478114
21SupportzebraHouston, TX1,001-5,00045299
22Ansafone Contact CentersOcala, FL501-1,00042970
23CentrisLongview, TX1,001-5,00036525
24The Connection Contact CenterBurnsville, MN1,001-5,0003536
25Five Star Call CentersSioux Falls, SD1,001-5,00031261

Showing 25 of 781 call center companies based in the United States

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Call center companies based in the United States at a glance

As of Aug 28, 2026
51-200Median size (employees)
MiamiLargest hub · 21 HQs
9,936Contacts with mobile numbers
15Emails re-verified in last 30 days

Companies by employee count

1-10
136
11-50
245
51-200
199
201-500
102
501-1,000
40
1,001-5,000
44
5,001-10,000
7
10001+
5

Call center companies by metro

MetroCompanies
Call center companies in Miami21
Call center companies in Houston19
Call center companies in New York15
Call center companies in Los Angeles13
Call center companies in Austin12
Call center companies in Orlando12
Call center companies in Atlanta12

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 companies”, 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; 15 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 companies are there based in the United States?

There are 781 call center companies 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 companies?

Miami leads with 21 headquartered companies, followed by Houston (19) and New York (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 4,032 verified decision-maker contacts tracked across these 781 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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Related lists

Browse: Companies home · All United States lists · All Call center companies lists · New lists

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.

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