Company lists · Data refreshed September 2026

Top 25 Sales outsourcing call centers based in the United States

Name: Sales outsourcing 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 15, 2026 1,841 companies tracked

RevenueBase identified 1,841 sales outsourcing call centers headquartered in the United States as of September 2026 and tracks 136,667 professional contacts across them, including 14,787 with verified work emails. New York is the largest hub.

This list covers sales outsourcing 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 15, 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 15, 2026 86% judged on-target in blind review

1,841Companies

136,667Contacts tracked

14,787Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest sales outsourcing call centers based in the United States

Ranked by team size

Top 25 of 1,841 sales outsourcing call centers based in the United States, ranked by team size, largest first. Data refreshed Sep 15, 2026. RevenueBase Smart Search rates how each company's information relates to sales outsourcing 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	IBEX	Partial evidence	Washington, DC, United StatesHQ checked Sep 15, 2026	10001+	15,457 contacts →
	Partial evidence “ibex delivers innovative business process outsourcing (BPO), smart digital marketing, online acquisition technology, and end-to-end customer engagement solutions to help companies…” Source: RevenueBase Database · checked Sep 15, 2026
2	VXI Global Solutions	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 15, 2026	10001+	14,238 contacts →
	Indirect evidence “About VXI Global Solutions VXI Global Solutions is a BPO leader in customer service, customer experience, and digital solutions.” Source: RevenueBase Database · checked Sep 15, 2026
3	Afni, INC	Partial evidence	Bloomington, IL, United StatesHQ checked Sep 15, 2026	10001+	5,553 contacts →
	Partial evidence “When people reach for their phones, use laptops, or grab their tablets, Afni's contact center teams are there to provide prompt and friendly help.” Source: RevenueBase Database · checked Sep 15, 2026
4	Continuum Global Solutions	Partial evidence	Dallas, TX, United StatesHQ checked Sep 15, 2026	5,001-10,000	4,342 contacts →
	Partial evidence “With a fresh name and decades of contact center expertise, we’re dedicated to collaborative partnerships, understanding your unique needs, and tailoring solutions for an enhanced…” Source: RevenueBase Database · checked Sep 15, 2026
5	Telvista	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 15, 2026	1,001-5,000	3,122 contacts →
	Indirect 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 15, 2026
6	Advanced Call Center Technologies, LLC	Strong evidence	Berwyn, PA, United StatesHQ checked Sep 15, 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 15, 2026
7	Stream Global Services	Partial evidence	Eagan, MN, United StatesHQ checked Sep 15, 2026	10001+	2,772 contacts →
	Partial evidence “Stream Global Services is a premium business process outsource (BPO) service provider specializing in customer relationship management solutions including sales, customer care…” Source: RevenueBase Database · checked Sep 15, 2026
8	Marketstar	Strong evidence	Ogden, UT, United StatesHQ checked Sep 15, 2026	1,001-5,000	2,446 contacts →
	Strong evidence “MarketStar is a global B2B sales outsourcing leader with 38+ years of experience driving predictable revenue growth.” Source: RevenueBase Database · checked Sep 15, 2026
9	Alta Resources	Indirect evidence	Neenah, WI, United StatesHQ checked Sep 15, 2026	1,001-5,000	2,046 contacts →
	Indirect evidence “Alta Resources has always worked to be something different.” Source: RevenueBase Database · checked Sep 15, 2026
10	Liveops, INC	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 15, 2026	n/a	2,026 contacts →
	Indirect 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 15, 2026
11	Infocision Management Corporation	Partial evidence	Akron, OH, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,764 contacts →
	Partial evidence “InfoCision is an award-winning contact center partner trusted by leading brands for over 40 years.” Source: RevenueBase Database · checked Sep 15, 2026
12	Km2 Solutions	Partial evidence	Boca Raton, FL, United StatesHQ checked Sep 15, 2026	5,001-10,000	1,741 contacts →
	Partial 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 15, 2026
13	Supportninja	Indirect evidence	Austin, TX, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,711 contacts →
	Indirect evidence “SupportNinja provides customer experience and back-office support services for tech companies and startups around the world.” Source: RevenueBase Database · checked Sep 15, 2026
14	Support Services Group	Partial evidence	Waco, TX, United StatesHQ checked Sep 15, 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 15, 2026
15	Percepta	Indirect evidence	Allen Park, MI, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,568 contacts →
	Indirect evidence “Percepta is a global customer relationship organization that manages all forms of contact with our clients’ customers, prospective customers, suppliers and distribution networks.” Source: RevenueBase Database · checked Sep 15, 2026
16	Dialamerica	Indirect evidence	Mahwah, NJ, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,536 contacts →
	Indirect evidence “DialAmerica is now Aucera.” Source: RevenueBase Database · checked Sep 15, 2026
17	RDI Corporation	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,484 contacts →
	Indirect evidence “At RDI, we believe in winning smart by providing customized, strategic solutions to our clients.” Source: RevenueBase Database · checked Sep 15, 2026
18	Datamark, INC	Strong evidence	El Paso, TX, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,418 contacts →
	Strong 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 15, 2026
19	Full Potential Solutions	Partial evidence	Waltham, MA, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,238 contacts →
	Partial evidence “Full Potential Solutions (FPS) is a new kind of performance-based outsourcing firm that puts culture and employees first, because we believe that happy, fulfilled teams accomplish…” Source: RevenueBase Database · checked Sep 15, 2026
20	Valor Global	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 15, 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 15, 2026
21	Peak Support	Partial evidence	Cambridge, MA, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,036 contacts →
	Partial evidence “Peak Support: A Ubiquity Company is a business process outsourcing (BPO) company growing dedicated to providing exceptional support to high-growth companies.” Source: RevenueBase Database · checked Sep 15, 2026
22	Transparent BPO	Strong evidence	Rockville, MD, United StatesHQ checked Sep 15, 2026	1,001-5,000	972 contacts →
	Strong evidence “Transparent BPO was founded to provide its clients with superior nearshore contact center services and business process outsourcing at competitive pricing.” Source: RevenueBase Database · checked Sep 15, 2026
23	Inktel Contact Center Solutions	Strong evidence	Doral, FL, United StatesHQ checked Sep 15, 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 15, 2026
24	Answernet	Indirect evidence	Horsham, PA, United StatesHQ checked Sep 15, 2026	501-1,000	883 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 Sep 15, 2026
25	CBE Companies	Indirect evidence	Cedar Falls, IA, United StatesHQ checked Sep 15, 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 15, 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: sales outsourcing 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 sales outsourcing call centers.
Partial evidence: Its own public description names part of sales outsourcing call centers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sales outsourcing 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 1,841 sales outsourcing call centers based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 14,787 reachable decision-makers.

Free signup · no credit card

View the full list →

Sales outsourcing call centers based in the United States at a glance

As of Sep 15, 2026

10.8%Verified-email coverage

74.2Average contacts per company

11-50Median size (employees)

3.3%Largest-city concentration · New York

Sep 15, 2026Page data refreshed

Companies by employee count

1-10

433

11-50

604

51-200

441

201-500

180

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 1,841 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 sales outsourcing 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 “sales outsourcing 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 sales outsourcing 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 sales outsourcing 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, 14,787 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 15, 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.

Sales outsourcing call centers by metro

Sales outsourcing call centers in New York61
Sales outsourcing call centers in Houston46
Sales outsourcing call centers in Miami43
Sales outsourcing call centers in Sheridan40
Sales outsourcing call centers in Los Angeles39
Sales outsourcing call centers in Austin35
Sales outsourcing call centers in Chicago27

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 sales outsourcing 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 sales outsourcing call centers are there based in the United States?

RevenueBase identified 1,841 sales outsourcing 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?

IBEX, headquartered in Washington, tops this list with the largest team on record.

Which city has the most sales outsourcing call centers?

New York leads with 61 headquartered companies, followed by Houston (46) and Miami (43).

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 14,787 verified decision-maker contacts tracked across these 1,841 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 15, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,841 sales outsourcing call centers based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Sales outsourcing call centers by geography

Browse the directory

Browse: Companies home · All United States lists · All Sales outsourcing call centers lists · New lists

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.