Company lists · Data refreshed September 2026

Top 25 Business services companies based in the United States

Name: Business services 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 19, 2026 2,270 companies tracked

RevenueBase identified 2,270 business services companies headquartered in the United States as of September 2026 and tracks 17,217 professional contacts across them, including 3,488 with verified work emails. New York is the largest hub.

This list covers business services 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 19, 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 19, 2026 86% judged on-target in blind review

2,270Companies

17,217Contacts tracked

3,488Verified emails

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The 25 largest business services companies based in the United States

Ranked by team size

Top 25 of 2,270 business services companies based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to business services 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	Brown Edwards	Indirect evidence	Roanoke, VA, United StatesHQ checked Sep 19, 2026	201-500	496 contacts →
	Indirect evidence “Providing Professional Business Advisory and Consulting Services including tax, accounting and IT services.” Source: RevenueBase Database · checked Sep 19, 2026
2	Sensiba LLP	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 19, 2026	501-1,000	493 contacts →
	Indirect evidence “Sensiba’s comprehensive accounting, tax, and consulting services help businesses and people solve problems, navigate complexity, and build a foundation for sustainable growth.” Source: RevenueBase Database · checked Sep 19, 2026
3	Scottmadden, INC	Indirect evidence	Raleigh, NC, United StatesHQ checked Sep 19, 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 19, 2026
4	Greenpoint Global	Indirect evidence	Rye, NY, United StatesHQ checked Sep 19, 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 19, 2026
5	Accounting Solutions	Indirect evidence	Houston, PA, United StatesHQ checked Sep 19, 2026	n/a	149 contacts →
	Indirect evidence “Accounting Solutions provides a wide range of services to individuals and businesses in a variety of industries.” Source: RevenueBase Database · checked Sep 19, 2026
6	Trivium	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 19, 2026	51-200	91 contacts →
	Indirect evidence “50+M&A TRANSACTIONS \| 90+% RECEIVE FUNDING 100+TEAM MEMBERS \| 10K+EXECUTIVES IN TRIVIUM NETWORK Trivium is a Finance, Accounting, Human Resources, and Tax consulting firm offering…” Source: RevenueBase Database · checked Sep 19, 2026
7	Clutch Group	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	n/a	90 contacts →
	Indirect evidence “A company that provides business services.” Source: RevenueBase Database · checked Sep 19, 2026
8	Kellogg & Andelson	Indirect evidence	Woodland Hills, CA, United StatesHQ checked Sep 19, 2026	51-200	78 contacts →
	Indirect evidence “K&A was founded in 1939 by entrepreneurial Certified Public Accountants who specialized in providing tax, bookkeeping, business management and audit services to owner-operated…” Source: RevenueBase Database · checked Sep 19, 2026
9	GBS Group	Indirect evidence	Miramar, FL, United StatesHQ checked Sep 19, 2026	11-50	76 contacts →
	Indirect evidence “GBS Group is a business consultancy team offering comprehensive advice across multiple business areas.” Source: RevenueBase Database · checked Sep 19, 2026
10	Alliance For Nonprofit Resources	Indirect evidence	Butler, PA, United StatesHQ checked Sep 19, 2026	51-200	73 contacts →
	Indirect evidence “Alliance for Nonprofit Resources (ANR) was founded to provide affordable administrative services to businesses and nonprofits of all sizes.” Source: RevenueBase Database · checked Sep 19, 2026
11	Bostrom	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	51-200	72 contacts →
	Indirect evidence “Bostrom is a professional services firm offering comprehensive management, consulting and outsourcing to the not-for-profit community.” Source: RevenueBase Database · checked Sep 19, 2026
12	Kaizen Cpas Advisors	Indirect evidence	Antioch, IL, United StatesHQ checked Sep 19, 2026	51-200	72 contacts →
	Indirect evidence “We help business owners get out of the frustration that comes with messy or unclear financials and replace it with systems, consistency, and advice they can actually rely on.” Source: RevenueBase Database · checked Sep 19, 2026
13	Grossberg Company LLP	Indirect evidence	Bethesda, MD, United StatesHQ checked Sep 19, 2026	51-200	64 contacts →
	Indirect evidence “With a tradition of excellence since 1924, Grossberg Company, LLP is one of the Washington DC area premier providers of accounting, tax and business consulting services.” Source: RevenueBase Database · checked Sep 19, 2026
14	Lanigan Ryan	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 19, 2026	51-200	61 contacts →
	Indirect evidence “Lanigan Ryan is a team of CPAs, Senior Business Consultants and Associates who specialize in the growth and development of privately-owned companies.” Source: RevenueBase Database · checked Sep 19, 2026
15	PSK LLP	Indirect evidence	Arlington, TX, United StatesHQ checked Sep 19, 2026	11-50	61 contacts →
	Indirect evidence “We provide accounting, tax, audit and business consulting services to clients both nationally and locally from our home in Arlington, Texas, in the Dallas-Fort Worth Metroplex.” Source: RevenueBase Database · checked Sep 19, 2026
16	PBO Advisory Group	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	51-200	55 contacts →
	Indirect evidence “At PBO Advisory Group, we assess, outsource, and advise in the areas of accounting & finance, human resources, human capital consulting, and business operations to increase…” Source: RevenueBase Database · checked Sep 19, 2026
17	Human Services Management Corporation	Indirect evidence	Milford, MA, United StatesHQ checked Sep 19, 2026	501-1,000	54 contacts →
	Indirect evidence “Growing and right-sized human services agencies choose the shared business and management consulting services of Human Services Management Corporation so they can effectively…” Source: RevenueBase Database · checked Sep 19, 2026
18	Concannon, Miller & Co. P.C	Indirect evidence	Bethlehem, PA, United StatesHQ checked Sep 19, 2026	51-200	53 contacts →
	Indirect evidence “On November 1, 2022, Concannon Miller team members joined CLA (CliftonLarsonAllen LLP).” Source: RevenueBase Database · checked Sep 19, 2026
19	PKF SAN Diego, LLP	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	52 contacts →
	Indirect evidence “About PKF San Diego, LLP For almost 30 years, PKF San Diego, LLP has been a trusted partner for businesses and individuals, delivering expert financial guidance with a commitment…” Source: RevenueBase Database · checked Sep 19, 2026
20	Barbich Hooper King Dill Hoffman, LLP	Indirect evidence	Bakersfield, CA, United StatesHQ checked Sep 19, 2026	51-200	51 contacts →
	Indirect evidence “As businesses evolve in response to new economic and technological opportunities, so does the accounting and consulting firm of Barbich Hooper King Dill Hoffman.” Source: RevenueBase Database · checked Sep 19, 2026
21	Decosimo NOW Elliott Davis Decosimo	Indirect evidence	Greenville, SC, United StatesHQ checked Sep 19, 2026	201-500	47 contacts →
	Indirect evidence “Decosimo is now Elliott Davis Decosimo.” Source: RevenueBase Database · checked Sep 19, 2026
22	GYL Cpas And Advisors	Indirect evidence	Ontario, CA, United StatesHQ checked Sep 19, 2026	11-50	46 contacts →
	Indirect evidence “We’re the Certified Public Accountants and Business Consultants that companies rely on.” Source: RevenueBase Database · checked Sep 19, 2026
23	Gabe, INC	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	46 contacts →
	Indirect evidence “PROFESSIONAL SUPPORT SERVICES We work for you as a preferred provider.” Source: RevenueBase Database · checked Sep 19, 2026
24	Fenner, Melstrom & Dooling, PLC	Indirect evidence	Birmingham, MI, United StatesHQ checked Sep 19, 2026	11-50	45 contacts →
	Indirect evidence “Fenner, Melstrom & Dooling has built a solid reputation for delivering professional services timely and accurately.” Source: RevenueBase Database · checked Sep 19, 2026
25	Lurie, LLP NOW Eisneramper	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	45 contacts →
	Indirect evidence “Effective September 16, 2022, Lurie, LLP is now EisnerAmper, and part of one of the largest business consulting firms in the world.” Source: RevenueBase Database · checked Sep 19, 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: business services 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 business services companies.
Partial evidence: Its own public description names part of business services companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name business services 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 2,270 business services companies based in the United States

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Business services companies based in the United States at a glance

As of Sep 19, 2026

20.3%Verified-email coverage

7.6Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

1,794

11-50

372

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 2,270 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 business services 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 “business services 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 business services 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 business services 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, 3,488 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 19, 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.

Business services companies by metro

Business services companies in New York70
Business services companies in Houston47
Business services companies in Atlanta44
Business services companies in Los Angeles44
Business services companies in Miami31
Business services companies in Austin26
Business services companies in Chicago26

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 business services 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 business services companies are there based in the United States?

RevenueBase identified 2,270 business services 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?

Brown Edwards, headquartered in Roanoke, tops this list with the largest team on record.

Which city has the most business services companies?

New York leads with 70 headquartered companies, followed by Houston (47) and Atlanta (44).

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 3,488 verified decision-maker contacts tracked across these 2,270 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 19, 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.