Company lists · Data refreshed September 2026

Top 25 Collections call centers based in the United States

Name: Collections call centers 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 515 companies tracked

RevenueBase identified 515 collections call centers headquartered in the United States as of September 2026 and tracks 36,081 professional contacts across them, including 5,531 with verified work emails. Houston is the largest hub.

This list covers collections call centers 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

515Companies

36,081Contacts tracked

5,531Verified emails

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The 25 largest collections call centers based in the United States

Ranked by team size

Top 25 of 515 collections call centers 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 collections call centers: 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	TSI	Indirect evidence	Fort Washington, WA, United StatesHQ checked Sep 27, 2026	10001+	3,677 contacts →
	Indirect evidence “Transworld Systems Inc.(TSI) stands as the leading tech-driven provider in Accounts Receivable Management (ARM), Healthcare Revenue Cycle Management (RCM), Customer Experience…” Source: RevenueBase Database · checked Sep 27, 2026
2	Advanced Call Center Technologies, LLC	Strong evidence	Berwyn, PA, United StatesHQ checked Sep 27, 2026	5,001-10,000	2,774 contacts →
	Strong evidence “Advanced Call Center Technologies, LLC (ACT) is a premier provider of domestic (USA), near shore and far shore outsourced call center services to the financial services, mortgage…” Source: RevenueBase Database · checked Sep 27, 2026
3	Encore Capital Group	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 27, 2026	5,001-10,000	2,587 contacts →
	Indirect evidence “Encore means more.” Source: RevenueBase Database · checked Sep 27, 2026
4	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
5	Valor Global	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,048 contacts →
	Indirect evidence “Valor Global is a global leader in providing extraordinary customer experiences for clients across the globe.” Source: RevenueBase Database · checked Sep 27, 2026
6	Inktel Contact Center Solutions	Strong evidence	Doral, FL, United StatesHQ checked Sep 27, 2026	1,001-5,000	902 contacts →
	Strong evidence “Our Company Inktel is a leading business process outsourcer that specializes in creating personalized call center solutions which enable our clients to increase market share…” Source: RevenueBase Database · checked Sep 27, 2026
7	CBE Companies	Indirect evidence	Cedar Falls, IA, United StatesHQ checked Sep 27, 2026	1,001-5,000	877 contacts →
	Indirect evidence “CBE Companies is the parent organization of CBE Customer Solutions and CBE Group.” Source: RevenueBase Database · checked Sep 27, 2026
8	GC Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 27, 2026	5,001-10,000	768 contacts →
	Indirect evidence “We are a trusted leader in providing integrated solutions, leveraging cutting-edge technology to deliver exceptional customer experiences.” Source: RevenueBase Database · checked Sep 27, 2026
9	Client Services Incorporated	Indirect evidence	Saint Charles, MO, United StatesHQ checked Sep 27, 2026	501-1,000	629 contacts →
	Indirect evidence “Client Services, Inc.(CSI) was founded in 1987 in the heartland of America.” Source: RevenueBase Database · checked Sep 27, 2026
10	Resurgent Capital Services	Partial evidence	Greenville, SC, United StatesHQ checked Sep 27, 2026	501-1,000	567 contacts →
	Partial evidence “At Resurgent Capital Services, we’re not just about debt collection; we’re about fostering personal and professional excellence.” Source: RevenueBase Database · checked Sep 27, 2026
11	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
12	Coast Professional, INC	Strong evidence	Geneseo, NY, United StatesHQ checked Sep 27, 2026	501-1,000	514 contacts →
	Strong evidence “Coast is a top-performing call center services company that specializes in onshore omni-channel solutions, accounts receivable management, and back-office functions for public and…” Source: RevenueBase Database · checked Sep 27, 2026
13	Allianceone	Indirect evidence	Blue Bell, PA, United StatesHQ checked Sep 27, 2026	1,001-5,000	421 contacts →
	Indirect evidence “AllianceOne offers the financial strength, imagination, technological sophistication, and a work ethic that is the envy of our industry.” Source: RevenueBase Database · checked Sep 27, 2026
14	Windham Professionals INC	Indirect evidence	Salem, NH, United StatesHQ checked Sep 27, 2026	201-500	417 contacts →
	Indirect evidence “Windham Professionals, Inc.” Source: RevenueBase Database · checked Sep 27, 2026
15	First Credit Services INC	Partial evidence	Piscataway, NJ, United StatesHQ checked Sep 27, 2026	501-1,000	367 contacts →
	Partial evidence “First Credit Services is a Digital Debt Collection and BPO Company specializing in Accounts Receivable Management and Customer Service Outsourcing.” Source: RevenueBase Database · checked Sep 27, 2026
16	Williams & Fudge, INC	Indirect evidence	Rock Hill, SC, United StatesHQ checked Sep 27, 2026	201-500	360 contacts →
	Indirect evidence “Founded in 1986, Williams & Fudge, Inc.” Source: RevenueBase Database · checked Sep 27, 2026
17	The Connection Contact Center	Partial evidence	Bloomington, MN, United StatesHQ checked Sep 27, 2026	1,001-5,000	354 contacts →
	Partial evidence “For over 35 years, The Connection has made a name for ourselves becoming one of the top industry partners to Fortune 500 companies looking to outsource their contact center…” Source: RevenueBase Database · checked Sep 27, 2026
18	The CCS Companies	Partial evidence	Norwood, MA, United StatesHQ checked Sep 27, 2026	501-1,000	341 contacts →
	Partial evidence “The CCS organization provides expert solutions in the following focused specialties: • Credit Collection Services (CCS): CCS is widely recognized as one the nation’s largest and…” Source: RevenueBase Database · checked Sep 27, 2026
19	ARS National Services	Indirect evidence	Escondido, TX, United StatesHQ checked Sep 27, 2026	201-500	327 contacts →
	Indirect evidence “A NATIONAL LEADER ARS is a proven leader in the accounts receivable management industry:> Working with customers in all 50 states, through 4 regional offices throughout the United…” Source: RevenueBase Database · checked Sep 27, 2026
20	Phillips & Cohen Associates	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 27, 2026	201-500	319 contacts →
	Partial evidence “A Reputation for Results Phillips & Cohen Associates has built a successful and rapidly growing business by delivering industry-leading collections results while simultaneously…” Source: RevenueBase Database · checked Sep 27, 2026
21	Harris & Harris	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 27, 2026	501-1,000	290 contacts →
	Indirect evidence “Harris & Harris is an acknowledged leader in the field of accounts receivable management.” Source: RevenueBase Database · checked Sep 27, 2026
22	Caine & Weiner	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	201-500	278 contacts →
	Partial evidence “Caine & Weiner is a solution-based accounts receivable management enterprise, founded in 1930, that specializes in providing 1st and 3rd party collection solutions to commercial…” Source: RevenueBase Database · checked Sep 27, 2026
23	Capital Management Services, LP	Indirect evidence	Buffalo, NY, United StatesHQ checked Sep 27, 2026	201-500	256 contacts →
	Indirect evidence “Capital Management Services, LP is a Nationally recognized industry leader in Accounts Receivable Management services.” Source: RevenueBase Database · checked Sep 27, 2026
24	Unifin INC	Partial evidence	Skokie, IL, United StatesHQ checked Sep 27, 2026	501-1,000	243 contacts →
	Partial evidence “Unifin Inc, established in 2011, is a veteran-owned digital debt collection and accounts receivable management agency.” Source: RevenueBase Database · checked Sep 27, 2026
25	Professional	Partial evidence	Vancouver, WA, United StatesHQ checked Sep 27, 2026	51-200	233 contacts →
	Partial evidence “Founded in 1933, Professional specializes in accounts receivable management services offering two dedicated service lines: Professional Credit collections, and Ensource, scalable…” 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: collections call centers. 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 collections call centers.
Partial evidence: Its own public description names part of collections call centers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name collections call centers. 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 515 collections call centers based in the United States

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Collections call centers based in the United States at a glance

As of Sep 27, 2026

15.3%Verified-email coverage

70.1Average contacts per company

11-50Median size (employees)

1.9%Largest-city concentration · Houston

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

11-50

175

51-200

123

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 515 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 collections call centers, 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 “collections call centers”. 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 collections call centers), 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 collections call centers, 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, 5,531 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 collections call centers, 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 collections call centers are there based in the United States?

RevenueBase identified 515 collections call centers 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?

TSI, headquartered in Federal Way, tops this list with the largest team on record.

Which city has the most collections call centers?

Houston leads with 10 headquartered companies, followed by Phoenix (10) and Miami (7).

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 5,531 verified decision-maker contacts tracked across these 515 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.