Company lists · Data refreshed September 2026

Top 25 Outbound sales agencies based in the United States

Name: Outbound sales agencies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 2,748 companies tracked

RevenueBase identified 2,748 outbound sales agencies headquartered in the United States as of September 2026 and tracks 48,318 professional contacts across them, including 5,941 with verified work emails and 9,497 with mobile numbers. New York is the largest hub.

This list covers outbound sales agencies 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 3, 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 3, 2026 86% judged on-target in blind review

2,748Companies

48,318Contacts tracked

5,941Verified emails

9,497Mobile numbers

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The 25 largest outbound sales agencies based in the United States

Ranked by team size

Top 25 of 2,748 outbound sales agencies based in the United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. RevenueBase Smart Search rates how each company's information relates to outbound sales agencies: 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	Advanced Call Center Technologies, LLC	Indirect evidence	Berwyn, TN, United StatesHQ checked Sep 3, 2026	5,001-10,000	2,779 contacts →
	Indirect 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 3, 2026
2	Marketstar	Partial evidence	Ogden, UT, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,459 contacts →
	Partial evidence “We are celebrating nearly four decades of sales specialization and creating growth for businesses around the globe.” Source: RevenueBase Database · checked Sep 3, 2026
3	Inktel Contact Center Solutions	Indirect evidence	Doral, FL, United StatesHQ checked Sep 3, 2026	1,001-5,000	905 contacts →
	Indirect 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 3, 2026
4	Answernet	Indirect evidence	Horsham, PA, United StatesHQ checked Sep 3, 2026	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 Sep 3, 2026
5	S2w Media	Indirect evidence	New York, CA, United StatesHQ checked Sep 3, 2026	501-1,000	798 contacts →
	Indirect evidence “We are innovators, problem solvers, thought leaders, and above all else, a team.” Source: RevenueBase Database · checked Sep 3, 2026
6	Salelytics	Indirect evidence	Appleton, WI, United StatesHQ checked Sep 3, 2026	1,001-5,000	784 contacts →
	Indirect evidence “Salelytics is now MarketSource.” Source: RevenueBase Database · checked Sep 3, 2026
7	Abstrakt Marketing Group	Indirect evidence	St Louis, MO, United StatesHQ checked Sep 3, 2026	501-1,000	724 contacts →
	Indirect evidence “Abstrakt Marketing Group helps businesses grow with bold strategies that deliver results.” Source: RevenueBase Database · checked Sep 3, 2026
8	Infinity	Partial evidence	Cedar Rapids, IA, United StatesHQ checked Sep 3, 2026	501-1,000	606 contacts →
	Partial evidence “Infinity is an award-winning inside sales agency and consulting firm with 30 years of experience helping B2B companies maximize sales and drive revenue.” Source: RevenueBase Database · checked Sep 3, 2026
9	Telenet Marketing Solutions	Indirect evidence	Athens, GA, United StatesHQ checked Sep 3, 2026	201-500	554 contacts →
	Indirect evidence “From initial market awareness to the final stages of a complex B2B buying journey, modern buyers crave authentic interaction.” Source: RevenueBase Database · checked Sep 3, 2026
10	Callbox INC	Indirect evidence	Encino, CA, United StatesHQ checked Sep 3, 2026	201-500	501 contacts →
	Indirect evidence “Callbox is the #1 trusted lead generation services and AI-Powered Growth Strategy Partner by enterprise and scaling businesses in the USA, Canada, Asia Pacific, Latin America…” Source: RevenueBase Database · checked Sep 3, 2026
11	Infoanalytica, INC	Partial evidence	San Jose, CA, United StatesHQ checked Sep 3, 2026	201-500	477 contacts →
	Partial evidence “InfoAnalytica is a B2B sales acceleration partner for mid-market and enterprise companies.” Source: RevenueBase Database · checked Sep 3, 2026
12	Beyond Codes INC	Indirect evidence	Simi Valley, TX, United StatesHQ checked Sep 3, 2026	201-500	385 contacts →
	Indirect evidence “Founded in 2008, Beyond Codes Inc.” Source: RevenueBase Database · checked Sep 3, 2026
13	EBQ	Partial evidence	Austin, TX, United StatesHQ checked Sep 3, 2026	201-500	379 contacts →
	Partial evidence “EBQ is an outsourced sales and marketing organization that provides services to help companies scale.” Source: RevenueBase Database · checked Sep 3, 2026
14	The Connection Contact Center	Indirect evidence	Bloomington, MN, United StatesHQ checked Sep 3, 2026	1,001-5,000	353 contacts →
	Indirect 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 3, 2026
15	FUNNL	Partial evidence	Philadelphia, United StatesHQ checked Sep 3, 2026	201-500	351 contacts →
	Partial evidence “FunnL was built on a revolutionary idea: B2B companies don’t need more leads-they need more qualified sales meetings with decision-makers.” Source: RevenueBase Database · checked Sep 3, 2026
16	Unboundb2b	Partial evidence	San Jose, CA, United StatesHQ checked Sep 3, 2026	201-500	295 contacts →
	Partial evidence “UnboundB2B is a marketing agency that caters to Enterprise and Technology companies across the globe to improve ROI on their marketing spend and shorten sales cycle with its…” Source: RevenueBase Database · checked Sep 3, 2026
17	By Appointment Only, Inc. BAO	Indirect evidence	Chelmsford, AZ, United StatesHQ checked Sep 3, 2026	201-500	294 contacts →
	Indirect evidence “The market knows us as the leader in appointment setting.” Source: RevenueBase Database · checked Sep 3, 2026
18	Boomsourcing	Indirect evidence	Lehi, UT, United StatesHQ checked Sep 3, 2026	501-1,000	254 contacts →
	Indirect evidence “Boomsourcing (A Fusion CX Company) is a call center established in 2007.” Source: RevenueBase Database · checked Sep 3, 2026
19	Rocket Connections	Partial evidence	Detroit, MI, United StatesHQ checked Sep 3, 2026	1,001-5,000	248 contacts →
	Partial evidence “Rocket Connections is a sales and support platform specializing in contact center services.” Source: RevenueBase Database · checked Sep 3, 2026
20	Squeeze	Partial evidence	Orem, UT, United StatesHQ checked Sep 3, 2026	501-1,000	217 contacts →
	Partial evidence “Squeeze (GoSqueeze.com) is the leader in Sales Experience (SX).” Source: RevenueBase Database · checked Sep 3, 2026
21	Plusone Company	Partial evidence	St George, UT, United StatesHQ checked Sep 3, 2026	201-500	214 contacts →
	Partial evidence “PlusOne Company is a unique sales center, providing the highest conversion rates in the competitive Direct Response industry.” Source: RevenueBase Database · checked Sep 3, 2026
22	Dynamic BDC	Strong evidence	Troy, MI, United StatesHQ checked Sep 3, 2026	501-1,000	190 contacts →
	Strong evidence “Dynamic Marketing Services was created to cost effectively address the needs of Dealers who want to professionally handle their internet leads as well as their outbound sales and…” Source: RevenueBase Database · checked Sep 3, 2026
23	Signia	Indirect evidence	Westminster, CO, United StatesHQ checked Sep 3, 2026	201-500	182 contacts →
	Indirect evidence “Signia aims to provide marketing services to targeted business environments in the US.” Source: RevenueBase Database · checked Sep 3, 2026
24	Reveneer	Partial evidence	Burlington, FL, United StatesHQ checked Sep 3, 2026	201-500	176 contacts →
	Partial evidence “Reveneer has a proven, precisely engineered process for exceptional inside sales results-and we're passionate about using it to solve our customers' sales challenges.” Source: RevenueBase Database · checked Sep 3, 2026
25	S4 Communications	Indirect evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	201-500	173 contacts →
	Indirect evidence “S4 Communications is a BPO provider with operations based out of Houston, Texas.” Source: RevenueBase Database · checked Sep 3, 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: outbound sales agencies. 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 outbound sales agencies.
Partial evidence: Its own public description names part of outbound sales agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outbound sales agencies. 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 2,748 outbound sales agencies based in the United States

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Outbound sales agencies based in the United States at a glance

As of Sep 3, 2026

12.3%Verified-email coverage

19.7%Mobile-number coverage

17.6Average contacts per company

11-50Median size (employees)

5.1%Largest-city concentration · New York

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

1,243

11-50

949

51-200

381

201-500

114

501-1,000

1,001-5,000

5,001-10,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

57731–60

3,15861–90

2,11190–180

95180+

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 outbound sales agencies, 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 “outbound sales agencies”. 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 outbound sales agencies), 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 outbound sales agencies, 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, 5,941 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 3, 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.

Outbound sales agencies by metro

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 outbound sales agencies, 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 outbound sales agencies are there based in the United States?

RevenueBase identified 2,748 outbound sales agencies 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?

Advanced Call Center Technologies, LLC, headquartered in Johnson City, tops this list with the largest team on record.

Which city has the most outbound sales agencies?

New York leads with 141 headquartered companies, followed by Los Angeles (81) and Sheridan (78).

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 5,941 verified decision-maker contacts tracked across these 2,748 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 3, 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.