Company lists · Data refreshed September 2026

Top 25 Professional services firms based in the United States

RevenueBase identified 22,273 professional services firms headquartered in the United States as of September 2026 and tracks 353,999 professional contacts across them, including 165,819 with verified work emails and 149,603 with mobile numbers. New York is the largest hub.

This list covers professional services 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review
22,273Companies
353,999Contacts tracked
165,819Verified emails
149,603Mobile numbers
Unlock all 22,273 companies Free signup · no credit card · 500 free credits

The 25 largest professional services firms based in the United States

Ranked by team size
Top 25 of 22,273 professional services firms based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names professional services firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
Bennett ThrasherIndirect evidence
Atlanta, GA, United StatesHQ checked Sep 5, 2026201-500558

“Bennett Thrasher provides proven guidance for financial confidence through premier tax, audit, advisory, and outsourcing solutions.”

Source: company website · checked Sep 5, 2026
2
ScrubbedIndirect evidence
Burlingame, CA, United StatesHQ checked Sep 5, 20261,001-5,000490

“Scrubbed delivers partner-led accounting, tax, advisory, and audit services to middle-market companies that want a financial partner they can trust.”

Source: company website · checked Sep 5, 2026
3
LUTZIndirect evidence
Omaha, NE, United StatesHQ checked Sep 5, 2026201-500435

“Founded in 1980 as a tech-forward accounting practice, Lutz has grown into Nebraska’s largest locally owned business solutions firm.”

Source: company website · checked Sep 5, 2026
4
BRCIndirect evidence
Greensboro, NC, United StatesHQ checked Sep 5, 2026201-500296

“BRC has been serving clients and their businesses throughout the Southeast for more than 75 years.”

Source: company website · checked Sep 5, 2026
5
ATAIndirect evidence
Jackson, TN, United StatesHQ checked Sep 5, 2026201-500224

“ATA is one of the largest accounting and consulting firms in the Mid-South and was named the ninth (9th) largest accounting firm in the State of Tennessee by American Business…”

Source: company website · checked Sep 5, 2026
6
Lga, LLPIndirect evidence
Woburn, MA, United StatesHQ checked Sep 5, 202651-200207

“LGA, LLP is an independent, full-service CPA and Business Advisory firm with over 45 years of experience in delivering financial focus to businesses.”

Source: company website · checked Sep 5, 2026
7
Tickmarks, INCIndirect evidence
Reston, VA, United StatesHQ checked Sep 5, 2026201-500207

“Tickmarks Inc.”

Source: company website · checked Sep 5, 2026
8
MBE CpasIndirect evidence
Baraboo, WI, United StatesHQ checked Sep 5, 202651-200201

“We are driven by more than a quality tax return, we provide effective solutions to help you, your family, and your business succeed.”

Source: company website · checked Sep 5, 2026
9
Hawkins ASH CpasIndirect evidence
La Crosse, WI, United StatesHQ checked Sep 5, 202651-200193

“Hawkins Ash CPAs, an Inside Public Accounting Top 200 firm, provides certified public accounting services to privately held businesses, governmental organizations, nonprofit…”

Source: company website · checked Sep 5, 2026
10Glendale, CA, United StatesHQ checked Sep 5, 202651-200187

“Hutchinson and Bloodgood LLP is a leading firm of Certified Public Accountants and Consultants providing Tax Planning, Auditing, Technology Consulting, Human Resources and…”

Source: company website · checked Sep 5, 2026
11
SymphonaIndirect evidence
Savannah, GA, United StatesHQ checked Sep 5, 202651-200173

“When every component of your business is working together in concert, those connections can create powerful and positive change.”

Source: company website · checked Sep 5, 2026
12
THF Thomas Howell FergusonIndirect evidence
Tallahassee, FL, United StatesHQ checked Sep 5, 202651-200163

“Thomas Howell Ferguson P.A.”

Source: company website · checked Sep 5, 2026
13
Duffy Kruspodin, LLPIndirect evidence
Woodland Hills, CA, United StatesHQ checked Sep 5, 2026201-500156

“Duffy Kruspodin, LLP is a Southern California CPA and advisory firm built on long-standing relationships, dependable guidance, and deep financial and business expertise.”

Source: company website · checked Sep 5, 2026
14
Andrews Hooper Pavlik PLCIndirect evidence
Saginaw, MI, United StatesHQ checked Sep 5, 202651-200153

“Andrews Hooper Pavlik PLC (AHP) was founded in 1993 by three partners of Ernst & Young.”

Source: company website · checked Sep 5, 2026
15
Ketel Thorstenson, LLPIndirect evidence
Rapid City, SD, United StatesHQ checked Sep 5, 202651-200141

“Ketel Thorstenson, LLP, is a full-service accounting firm rich in history, serving clients since 1936.”

Source: company website · checked Sep 5, 2026
16Red Bank, NJ, United StatesHQ checked Sep 5, 202651-200109

“We Make Your Business Operations Comfortable.”

Source: company website · checked Sep 5, 2026
17
D'arcangelo & Co., LLPIndirect evidence
Utica, NY, United StatesHQ checked Sep 5, 202651-200103

“Bringing our clients over 70 years of dedicated experience and service, D'Arcangelo & Co, LLP offers our clients a distinct difference through unsurpassed accounting, auditing…”

Source: company website · checked Sep 5, 2026
18
Kranz ConsultingIndirect evidence
San Francisco, CA, United StatesHQ checked Sep 5, 2026201-50099

“For 30 years, Kranz Consulting has advised and supported entrepreneurs and founders through the complexities of building high-growth businesses, and over 2,500 companies stand as…”

Source: company website · checked Sep 5, 2026
19
Engaging Solutions, LLCIndirect evidence
Indianapolis, United StatesHQ checked Sep 5, 202651-20099

“Engaging Solutions is a multi-faceted management consulting firm with the personnel and resources to accomplish everything from high level management and auditing to ground-level…”

Source: company website · checked Sep 5, 2026
20
Wegmann DazetIndirect evidence
Metairie, LA, United StatesHQ checked Sep 5, 202651-20096

“Known as the Entrepreneur’s CPA, Wegmann Dazet is one of the largest locally owned CPA/Business Advisory firms based in the Gulf South.”

Source: company website · checked Sep 5, 2026
21Fairfax, VA, United StatesHQ checked Sep 5, 202651-20095

“MCB is a full-service accounting firm celebrating nearly 80 very independent years of business in the Washington, DC metro area.”

Source: company website · checked Sep 5, 2026
22
TFC Consulting, INCIndirect evidence
Rockville, MD, United StatesHQ checked Sep 5, 202651-20093

“TFC Consulting, Inc is a licensed CPA and consulting firm in the Washington DC metro area.”

Source: company website · checked Sep 5, 2026
23
FrankelIndirect evidence
Omaha, NE, United StatesHQ checked Sep 5, 202651-20091

“Since 1959, our business and individual clients have thrived on our expertise and vision.”

Source: company website · checked Sep 5, 2026
24North Charleston, SC, United StatesHQ checked Sep 5, 202651-20090

“At Moore Beauston Woodham, we provide a comprehensive set of services for companies and individuals seeking financial planning, problem-solving, audit services and tax preparation.”

Source: company website · checked Sep 5, 2026
25
Acuity AccountingIndirect evidence
Atlanta, GA, United StatesHQ checked Sep 5, 202651-20089

“Acuity is the modern-day accounting organization built specifically for startups and small businesses.”

Source: company website · checked Sep 5, 2026

Showing 25 of 22,273 professional services firms based in the United States

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Professional services firms based in the United States at a glance

As of Sep 5, 2026
1-10Median size (employees)
New YorkLargest hub · 593 HQs
149,603Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
15,342
11-50
5,416
51-200
1,069
201-500
169
501-1,000
64
1,001-5,000
79
5,001-10,000
7
10001+
13

Verified emails by last verification

0–30
154,057
31–60
10,194
61–90
81
90–180
43
180+
1,444

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 professional services firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “professional services firms”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among professional services 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 an evidence 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, 165,819 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 5, 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.

Professional services firms by metro

Frequently asked

How many professional services firms are there based in the United States?

RevenueBase identified 22,273 professional services 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?

Bennett Thrasher, headquartered in Atlanta, tops this list with the largest team on record.

Which city has the most professional services firms?

New York leads with 593 headquartered companies, followed by Houston (420) and Atlanta (304).

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 165,819 verified decision-maker contacts tracked across these 22,273 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 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 22,273 professional services firms based in the United States. Start with a free account, no credit card.

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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 SmartSearch, 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.