Company lists · Data refreshed September 2026

Top 25 B2B service providers based in the United States

Name: B2B service providers 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 3,563 companies tracked

RevenueBase identified 3,563 B2B service providers headquartered in the United States as of September 2026 and tracks 35,154 professional contacts across them, including 7,462 with verified work emails. New York is the largest hub.

This list covers B2B service providers 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

3,563Companies

35,154Contacts tracked

7,462Verified emails

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The 25 largest B2B service providers based in the United States

Ranked by team size

Top 25 of 3,563 B2B service providers 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 B2B service providers: 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	RDI Corporation	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 21, 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 21, 2026
2	W3global	Indirect evidence	Frisco, TX, United StatesHQ checked Sep 21, 2026	501-1,000	1,149 contacts →
	Indirect evidence “W3Global is a leading provider of end-to-end consulting services, empowering businesses to achieve their strategic goals and optimize their operations.” Source: RevenueBase Database · checked Sep 21, 2026
3	Appdirect	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	501-1,000	924 contacts →
	Strong evidence “AppDirect is a San Francisco-based B2B subscription commerce platform company that brings together technology providers, advisors, and businesses to simplify how they buy, sell…” Source: RevenueBase Database · checked Sep 21, 2026
4	GBS Corp	Strong evidence	North Canton, OH, United StatesHQ checked Sep 21, 2026	201-500	742 contacts →
	Strong evidence “GBS Corp is a multi-faceted B2B solutions provider delivering integrated marketing, print, packaging, technology and healthcare IT services, all under one roof.” Source: RevenueBase Database · checked Sep 21, 2026
5	Anteriad	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	740 contacts →
	Indirect evidence “Data Driven.” Source: RevenueBase Database · checked Sep 21, 2026
6	ODP Business Solutions	Strong evidence	Boca Raton, FL, United StatesHQ checked Sep 21, 2026	501-1,000	687 contacts →
	Strong evidence “ODP Business Solutions, an operating company of The ODP Group, is a leading B2B provider of workplace and technology solutions, combining an extensive range of products and…” Source: RevenueBase Database · checked Sep 21, 2026
7	Point B	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 21, 2026	501-1,000	656 contacts →
	Indirect evidence “At Point B, we help organizations adapt and thrive in a world that refuses to stand still.” Source: RevenueBase Database · checked Sep 21, 2026
8	SEI	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 21, 2026	501-1,000	618 contacts →
	Indirect evidence “SEI is a management consulting firm delivering fresh perspectives and reliable results.” Source: RevenueBase Database · checked Sep 21, 2026
9	Global Strategic Business Process Solutions	Indirect evidence	Burlington, NC, United StatesHQ checked Sep 21, 2026	1,001-5,000	553 contacts →
	Indirect evidence “Global Strategic is a business process outsourcing partner that builds high-performing teams through custom onshore, nearshore, and offshore solutions.” Source: RevenueBase Database · checked Sep 21, 2026
10	OWN Business Management	Indirect evidence	Ajman Free Zone, United StatesHQ checked Sep 21, 2026	n/a	490 contacts →
	Indirect evidence “OBM is a leading business process management company in UAE which provides client driven business management solutions.” Source: RevenueBase Database · checked Sep 21, 2026
11	Demandshore	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	501-1,000	478 contacts →
	Strong 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
12	Romark Logistics	Indirect evidence	Westfield, NJ, United StatesHQ checked Sep 21, 2026	501-1,000	399 contacts →
	Indirect evidence “Founded in 1954, Romark Logistics has built its reputation on a foundation of strong partnerships and a dedicated team of professionals.” Source: RevenueBase Database · checked Sep 21, 2026
13	UCB	Indirect evidence	Toledo, OH, United StatesHQ checked Sep 21, 2026	501-1,000	392 contacts →
	Indirect evidence “UCB was founded in 1959.” Source: RevenueBase Database · checked Sep 21, 2026
14	Vertex Group	Indirect evidence	Olean, NY, United StatesHQ checked Sep 21, 2026	501-1,000	383 contacts →
	Indirect evidence “Vertex Global Services is one of the leading Business Optimization Solutions provider globally- Ranked 19th amongst 50 most innovative companies across the globe.” Source: RevenueBase Database · checked Sep 21, 2026
15	Thomas	Strong evidence	New York, United StatesHQ checked Sep 21, 2026	201-500	380 contacts →
	Strong evidence “We help B2B buyers and industrial suppliers grow their businesses and their careers.” Source: RevenueBase Database · checked Sep 21, 2026
16	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
17	Technologyadvice	Strong evidence	Nashville, TN, United StatesHQ checked Sep 21, 2026	201-500	309 contacts →
	Strong evidence “B2B Technology Advice From Experts Who Use It \| The latest B2B technology and software advice, trends, and guidance coming to you from the experts who work with it every day.” Source: RevenueBase Database · checked Sep 21, 2026
18	1105 Media	Strong evidence	Woodland Hills, CA, United StatesHQ checked Sep 21, 2026	51-200	278 contacts →
	Strong evidence “1105 Media, Inc, is a leading business-to-business (B2B) services provider whose sole mission is to help our customers grow their business.” Source: RevenueBase Database · checked Sep 21, 2026
19	Magnus Technology Solutions	Indirect evidence	Hayward, CA, United StatesHQ checked Sep 21, 2026	n/a	254 contacts →
	Indirect evidence “Magnus Technology Solutions, is a leading services firm that provides a portfolio of consulting, outsourcing and staffing services to a broad range of clients.” Source: RevenueBase Database · checked Sep 21, 2026
20	Scottmadden, INC	Indirect evidence	Raleigh, NC, United StatesHQ checked Sep 21, 2026	201-500	244 contacts →
	Indirect evidence “ScottMadden is a management consulting firm that does what it takes to get the job done right.” Source: RevenueBase Database · checked Sep 21, 2026
21	Staff Boom	Indirect evidence	Anaheim, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	237 contacts →
	Indirect evidence “Staff Boom specializes in customized staffing solutions and consulting for small and medium sized businesses to save money and resources, improve how they work and prevent…” Source: RevenueBase Database · checked Sep 21, 2026
22	Greenpoint Global	Indirect evidence	Rye, NY, United StatesHQ checked Sep 21, 2026	501-1,000	231 contacts →
	Indirect evidence “GreenPoint specializes in providing value-added professional services to a broad base of and other companies worldwide.” Source: RevenueBase Database · checked Sep 21, 2026
23	Callmax Solutions	Indirect evidence	Brooklyn, United StatesHQ checked Sep 21, 2026	201-500	212 contacts →
	Indirect 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
24	A&b Business Solutions	Indirect evidence	Sioux Falls, SD, United StatesHQ checked Sep 21, 2026	51-200	210 contacts →
	Indirect evidence “A&B Business is a facilitator for businesses that understand value of efficiency and reliable service.” Source: RevenueBase Database · checked Sep 21, 2026
25	Executive Software Guild INC	Indirect evidence	Mckinney, TX, United StatesHQ checked Sep 21, 2026	501-1,000	208 contacts →
	Indirect evidence “About Executive Software Guild Inc (ESG): At ESG, we pride ourselves on delivering world-class integrated business, technology, and process solutions globally.” 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: B2B service providers. 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 B2B service providers.
Partial evidence: Its own public description names part of B2B service providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name B2B service providers. 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 3,563 B2B service providers based in the United States

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B2B service providers based in the United States at a glance

As of Sep 21, 2026

21.2%Verified-email coverage

9.9Average contacts per company

1-10Median size (employees)

4.8%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

2,416

11-50

761

51-200

269

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 3,563 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 B2B service providers, 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 “B2B service providers”. 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 B2B service providers), 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 B2B service providers, 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, 7,462 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.

B2B service providers by metro

B2B service providers in New York171
B2B service providers in Los Angeles81
B2B service providers in Atlanta79
B2B service providers in Houston79
B2B service providers in Miami71
B2B service providers in Chicago61
B2B service providers in Dallas58
B2B service providers in Austin44
B2B service providers in Denver39
B2B service providers in Phoenix32
B2B service providers in Sheridan32
B2B service providers in Orlando31
B2B service providers in Charlotte30
B2B service providers in San Francisco30
B2B service providers in San Diego28
B2B service providers in Tampa28
B2B service providers in Washington28
B2B service providers in Minneapolis25
B2B service providers 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 B2B service providers, 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 B2B service providers are there based in the United States?

RevenueBase identified 3,563 B2B service providers 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?

RDI Corporation, headquartered in Cincinnati, tops this list with the largest team on record.

Which city has the most B2B service providers?

New York leads with 171 headquartered companies, followed by Los Angeles (81) and Atlanta (79).

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 7,462 verified decision-maker contacts tracked across these 3,563 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.