Company lists · Data refreshed September 2026

Top 25 Outsourced business development companies based in the United States

Name: Outsourced business development companies 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 3,748 companies tracked

RevenueBase identified 3,748 outsourced business development companies headquartered in the United States as of September 2026 and tracks 44,152 professional contacts across them, including 5,972 with verified work emails. New York is the largest hub.

This list covers outsourced business development 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. 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

3,748Companies

44,152Contacts tracked

5,972Verified emails

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The 25 largest outsourced business development companies based in the United States

Ranked by team size

Top 25 of 3,748 outsourced business development companies 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 outsourced business development companies: 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	Marketstar	Partial evidence	Ogden, UT, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,446 contacts →
	Partial 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
2	Memoryblue	Indirect evidence	Tysons, VA, United StatesHQ checked Sep 21, 2026	501-1,000	825 contacts →
	Indirect evidence “memoryBlue is the go-to partner for revenue leaders in B2B Tech looking to grow their pipeline engine.” Source: RevenueBase Database · checked Sep 21, 2026
3	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
4	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
5	Flexisales INC	Indirect evidence	Las Vegas, NV, United StatesHQ checked Sep 21, 2026	201-500	697 contacts →
	Indirect evidence “Flexisales, is a global frontrunner in B2B Lead & Demand Generation and Data Services, serving technology companies & agencies worldwide.” Source: RevenueBase Database · checked Sep 21, 2026
6	Tenpath	Partial evidence	Oak Brook, IL, United StatesHQ checked Sep 21, 2026	n/a	676 contacts →
	Partial evidence “Headquartered in the United States, Tenpath Solutions is a multinational leader in outsourced IT Professional Services.” Source: RevenueBase Database · checked Sep 21, 2026
7	Infinity	Indirect evidence	Cedar Rapids, IA, United StatesHQ checked Sep 21, 2026	501-1,000	609 contacts →
	Indirect 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
8	Movingdneedle Pvt. LTD	Indirect evidence	Sterling Heights, MI, United StatesHQ checked Sep 21, 2026	51-200	528 contacts →
	Indirect 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
9	The Pipeline Group	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	201-500	523 contacts →
	Indirect evidence “The Pipeline Group helps B2B tech companies scale pipeline fast through our SDR-as-a-Service model.” 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	Saleshive	Indirect evidence	Denver, CO, United StatesHQ checked Sep 21, 2026	51-200	455 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
12	The Functionary	Indirect evidence	Aubrey, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	415 contacts →
	Indirect evidence “The Functionary helps companies scale operations around the reality of their business, not a standard model.” Source: RevenueBase Database · checked Sep 21, 2026
13	Amarketforce	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	201-500	391 contacts →
	Indirect evidence “aMarketForce is a full-scale B2B Contact Database & Demand Generation services company.” Source: RevenueBase Database · checked Sep 21, 2026
14	Beyond Codes INC	Indirect evidence	Simi Valley, CA, United StatesHQ checked Sep 21, 2026	201-500	380 contacts →
	Indirect evidence “Beyond Codes is a global B2B lead generation and appointment-setting agency trusted by some of the world's leading technology companies to build enterprise sales pipeline.” 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	Indirect evidence	Philadelphia, United StatesHQ checked Sep 21, 2026	201-500	349 contacts →
	Indirect 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	Eplanet Global	Indirect evidence	Salt Lake City, UT, United StatesHQ checked Sep 21, 2026	501-1,000	329 contacts →
	Indirect evidence “About Eplanet Global Since our inception in 2003, Eplanet Global has been a trailblazer in the tech-driven BPO industry.” 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	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
20	Callmax Solutions	Partial evidence	Brooklyn, United StatesHQ checked Sep 21, 2026	201-500	212 contacts →
	Partial evidence “Callmax is a dedicated Business Process Outsourcing (BPO) provider empowering small and mid-sized businesses with tailored support designed to streamline operations and boost…” Source: RevenueBase Database · checked Sep 21, 2026
21	Sales Focus INC	Partial evidence	North Charleston, SC, United StatesHQ checked Sep 21, 2026	201-500	198 contacts →
	Partial evidence “Sales Focus Inc.(SFI) pioneered the sales outsourcing industry in 1998.” Source: RevenueBase Database · checked Sep 21, 2026
22	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
23	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
24	Ascend BPO Services, INC	Partial evidence	Princeton, NJ, United StatesHQ checked Sep 21, 2026	201-500	184 contacts →
	Partial evidence “Ascend BPO's diverse portfolio of services include Healthcare BPO, Database Management & Administration, Business Intelligence, Application Development for Desktop, Web and Mobile…” Source: RevenueBase Database · checked Sep 21, 2026
25	NIH Research & Consulting	Indirect evidence	Coral Springs, FL, United StatesHQ checked Sep 21, 2026	n/a	184 contacts →
	Indirect evidence “NIH Research & Consulting, LLC (NIHR) is the leading provider of exceptional market research and lead generation services for the healthcare technology industry.” 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: outsourced business development companies. 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 outsourced business development companies.
Partial evidence: Its own public description names part of outsourced business development companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outsourced business development companies. 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 3,748 outsourced business development companies based in the United States

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Outsourced business development companies based in the United States at a glance

As of Sep 21, 2026

13.5%Verified-email coverage

11.8Average contacts per company

1-10Median size (employees)

5.2%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

2,164

11-50

1,074

51-200

370

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 3,748 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 outsourced business development companies, 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 “outsourced business development companies”. 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 outsourced business development companies), 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 outsourced business development companies, 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, 5,972 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.

Outsourced business development companies by metro

Outsourced business development companies in New York195
Outsourced business development companies in Los Angeles95
Outsourced business development companies in Austin88
Outsourced business development companies in Miami83
Outsourced business development companies in Houston71
Outsourced business development companies in Sheridan71
Outsourced business development companies in Chicago69
Outsourced business development companies in San Francisco66
Outsourced business development companies in Atlanta65
Outsourced business development companies in Dallas63
Outsourced business development companies in Denver56
Outsourced business development companies in San Diego52
Outsourced business development companies in Orlando45
Outsourced business development companies in Wilmington34
Outsourced business development companies in Boston32
Outsourced business development companies in Charlotte31
Outsourced business development companies in Las Vegas30
Outsourced business development companies in Phoenix30
Outsourced business development companies in Philadelphia29
Outsourced business development companies in Tampa29
Outsourced business development companies in Pittsburgh25
Outsourced business development companies in Seattle25

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 outsourced business development companies, 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 outsourced business development companies are there based in the United States?

RevenueBase identified 3,748 outsourced business development companies 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?

Marketstar, headquartered in Ogden, tops this list with the largest team on record.

Which city has the most outsourced business development companies?

New York leads with 195 headquartered companies, followed by Los Angeles (95) and Austin (88).

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 5,972 verified decision-maker contacts tracked across these 3,748 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 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.