Company lists · Data refreshed September 2026

Top 25 Sales outsourcing firms based in the United States

Name: Sales outsourcing firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 2,294 companies tracked

RevenueBase identified 2,294 sales outsourcing firms headquartered in the United States as of September 2026 and tracks 40,421 professional contacts across them, including 5,818 with verified work emails. New York is the largest hub.

This list covers sales outsourcing firms 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 21, 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 21, 2026 86% judged on-target in blind review

2,294Companies

40,421Contacts tracked

5,818Verified emails

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The 25 largest sales outsourcing firms based in the United States

Ranked by team size

Top 25 of 2,294 sales outsourcing firms based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to sales outsourcing firms: 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	Marketsource INC	Partial evidence	Alpharetta, GA, United StatesHQ checked Sep 21, 2026	5,001-10,000	3,063 contacts →
	Partial evidence “MarketSource, an Allegis Group company, is a sales acceleration company focused on delivering better outcomes for many of the world’s most iconic brands.” Source: RevenueBase Database · checked Sep 21, 2026
2	Marketstar	Strong evidence	Ogden, UT, United StatesHQ checked Sep 21, 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 21, 2026
3	Full Potential Solutions	Partial evidence	Waltham, MA, United StatesHQ checked Sep 21, 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 21, 2026
4	Credico	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	n/a	1,188 contacts →
	Indirect evidence “Credico is the world's leading face-to-face customer acquisition agency, helping our clients attract and retain loyal customers.” Source: RevenueBase Database · checked Sep 21, 2026
5	Inktel Contact Center Solutions	Indirect evidence	Doral, FL, United StatesHQ checked Sep 21, 2026	1,001-5,000	902 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 21, 2026
6	Abstrakt Marketing Group	Indirect evidence	St Louis, MO, United StatesHQ checked Sep 21, 2026	501-1,000	724 contacts →
	Indirect evidence “We book the qualified meetings that fill your pipeline for any B2B company ready to grow.” Source: RevenueBase Database · checked Sep 21, 2026
7	Salebuild	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 21, 2026	n/a	708 contacts →
	Indirect evidence “Salesify, a leading provider of B2B demand generation services, helps our clients create pipeline and accelerate revenue by identifying, profiling, nurturing and connecting with…” Source: RevenueBase Database · checked Sep 21, 2026
8	Infinity	Partial evidence	Cedar Rapids, IA, United StatesHQ checked Sep 21, 2026	501-1,000	609 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 21, 2026
9	Movingdneedle Pvt. LTD	Partial evidence	Sterling Heights, MI, United StatesHQ checked Sep 21, 2026	51-200	528 contacts →
	Partial evidence “movingDneedle is a Business to Business Sales Lead Generation Company that provides fast and scalable, sales qualified leads through its unique Personalized Email Marketing…” Source: RevenueBase Database · checked Sep 21, 2026
10	Callbox INC	Indirect evidence	Encino, CA, United StatesHQ checked Sep 21, 2026	201-500	499 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 21, 2026
11	Infoanalytica, INC	Partial evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	201-500	482 contacts →
	Partial evidence “InfoAnalytica is a B2B sales acceleration partner for mid-market and enterprise companies.” Source: RevenueBase Database · checked Sep 21, 2026
12	Demandshore	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	501-1,000	478 contacts →
	Partial evidence “About DemandShore Since 2004, we’ve been working hard to deliver value to Sales & Marketing professionals across B2B Technology companies globally.” Source: RevenueBase Database · checked Sep 21, 2026
13	Saleshive	Indirect evidence	Denver, CO, United StatesHQ checked Sep 21, 2026	51-200	455 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
14	Smart Circle International	Partial evidence	Newport Beach, CA, United StatesHQ checked Sep 21, 2026	51-200	426 contacts →
	Partial evidence “At Smart Circle, our goal is to provide our clients with access to customized face-to- face marketing and sales solutions by connecting our clients with a dynamic network of…” Source: RevenueBase Database · checked Sep 21, 2026
15	EBQ	Partial evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	201-500	377 contacts →
	Partial evidence “EBQ is an outsourced sales and marketing organization that provides services to help companies scale.” Source: RevenueBase Database · checked Sep 21, 2026
16	FUNNL	Partial evidence	Philadelphia, United StatesHQ checked Sep 21, 2026	201-500	349 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 21, 2026
17	Jumpcrew	Partial evidence	Nashville, TN, United StatesHQ checked Sep 21, 2026	201-500	339 contacts →
	Partial evidence “Launch-ready sales teams, experienced leaders, and time-tested processes to help you acquire new customers faster and with less risk than doing it alone.” Source: RevenueBase Database · checked Sep 21, 2026
18	Cydcor	Indirect evidence	Agoura Hills, CA, United StatesHQ checked Sep 21, 2026	51-200	328 contacts →
	Indirect evidence “We create opportunity: For our clients, our team, and the future.” Source: RevenueBase Database · checked Sep 21, 2026
19	Calltend INC	Indirect evidence	Los Angeles, TX, United StatesHQ checked Sep 21, 2026	51-200	289 contacts →
	Indirect evidence “Current Vertical Focus: Real Estate - Lead Generation, Lead Conversion, Lead Qualification, Agent Recruiting Mortgage - Lead Conversion, Lead Qualification Insurance - Lead…” Source: RevenueBase Database · checked Sep 21, 2026
20	Rocket Connections	Partial evidence	Detroit, MI, United StatesHQ checked Sep 21, 2026	1,001-5,000	247 contacts →
	Partial evidence “Rocket Connections is a sales and support platform specializing in contact center services.” Source: RevenueBase Database · checked Sep 21, 2026
21	Marketjoy, INC	Partial evidence	Pensacola, FL, United StatesHQ checked Sep 21, 2026	51-200	223 contacts →
	Partial evidence “Founded in 2016 and headquartered in Pensacola, Florida, MarketJoy is a B2B lead generation, appointment generation and sales development partner built to deliver predictable…” Source: RevenueBase Database · checked Sep 21, 2026
22	Growth ERA	Partial evidence	Jacksonville, FL, United StatesHQ checked Sep 21, 2026	51-200	217 contacts →
	Partial evidence “Growth Era (formerly nextsales) is a sales enablement company with a passion to empower the growth of ambitious B2B companies.” Source: RevenueBase Database · checked Sep 21, 2026
23	Sales Focus INC	Strong evidence	North Charleston, SC, United StatesHQ checked Sep 21, 2026	201-500	198 contacts →
	Strong evidence “Sales Focus Inc.(SFI) pioneered the sales outsourcing industry in 1998.” Source: RevenueBase Database · checked Sep 21, 2026
24	Salaria Sales Solutions	Partial evidence	Washington D.c., WA, United StatesHQ checked Sep 21, 2026	51-200	188 contacts →
	Partial evidence “Salaria Sales Solutions is a B2B lead generation and sales development agency.” Source: RevenueBase Database · checked Sep 21, 2026
25	Concept Services	Partial evidence	Copley, OH, United StatesHQ checked Sep 21, 2026	51-200	185 contacts →
	Partial evidence “Concept develops and implements comprehensive B2B lead generation and sales development solutions for companies.” Source: RevenueBase Database · checked Sep 21, 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 firms. 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 firms.
Partial evidence: Its own public description names part of sales outsourcing firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sales outsourcing firms. 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 2,294 sales outsourcing firms based in the United States

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Sales outsourcing firms based in the United States at a glance

As of Sep 21, 2026

14.4%Verified-email coverage

17.6Average contacts per company

11-50Median size (employees)

4.3%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

1,129

11-50

800

51-200

264

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 2,294 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 firms, 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 firms”. 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 firms), 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 firms, 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, 5,818 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 21, 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 firms by metro

Sales outsourcing firms in New York98
Sales outsourcing firms in Austin60
Sales outsourcing firms in San Francisco59
Sales outsourcing firms in Los Angeles54
Sales outsourcing firms in Miami51
Sales outsourcing firms in Sheridan50
Sales outsourcing firms in Houston45
Sales outsourcing firms in Atlanta39
Sales outsourcing firms in Chicago39
Sales outsourcing firms in Dallas37
Sales outsourcing firms in San Diego33
Sales outsourcing firms in Orlando28
Sales outsourcing firms in Denver27
Sales outsourcing firms in Phoenix27

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 firms, 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 firms are there based in the United States?

RevenueBase identified 2,294 sales outsourcing firms 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?

Marketsource INC, headquartered in Alpharetta, tops this list with the largest team on record.

Which city has the most sales outsourcing firms?

New York leads with 98 headquartered companies, followed by Austin (60) and San Francisco (59).

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 5,818 verified decision-maker contacts tracked across these 2,294 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 21, 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.