Company lists · Data refreshed September 2026

Top 25 Professional services firms based in Houston, United States

RevenueBase identified 420 professional services firms headquartered in Houston, United States as of September 2026 and tracks 5,880 professional contacts across them, including 1,685 with verified work emails. New York is the largest hub.

This list covers professional services firms headquartered in Houston, 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
420Companies
5,880Contacts tracked
1,685Verified emails
Unlock all 420 companies Free signup · no credit card · 500 free credits

The 25 largest professional services firms based in Houston, United States

Ranked by team size
Top 25 of 420 professional services firms based in Houston, 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
Gray ReedIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 2026201-500314

“As a full-service Texas law firm with a comprehensive range of litigation and transactional practice groups, Gray Reed's 150 attorneys focus on understanding our clients'…”

Source: company website · checked Sep 5, 2026
2
MayataxIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 2026501-1,000269

“Growth exposes financial weakness.”

Source: company website · checked Sep 5, 2026
3
Sirius SolutionsIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 2026201-500231

“eTeam Sirius Solutions L.L.C.”

Source: company website · checked Sep 5, 2026
4
Calvetti FergusonIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 202651-200198

“Calvetti Ferguson is one of the largest independent CPA firms in the United States.”

Source: company website · checked Sep 5, 2026
5
Melton & Melton, LLPIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 202651-200157

“Melton & Melton is an independent, Houston-based public accounting firm with diverse audit, tax and client accounting practices.”

Source: company website · checked Sep 5, 2026
6
Accounting SolutionsIndirect evidence
Houston, PA, United StatesHQ checked Sep 5, 2026n/a149

“Accounting Solutions provides a wide range of services to individuals and businesses in a variety of industries.”

Source: company website · checked Sep 5, 2026
7
Malonebailey, LLPIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 202651-200125

“MaloneBailey is a full service, PCAOB-registered CPA firm that provides audit, tax and consulting services to companies both publicly-traded and privately-held.”

Source: company website · checked Sep 5, 2026
8
EEPBIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 202651-20096

“EEPB is one of Houston's largest local CPA firms offering a wide range of services to individuals and businesses.”

Source: company website · checked Sep 5, 2026
9
Weinstein SpiraIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 202651-20095

“Weinstein Spira is a highly respected CPA and business advisory firm that proactively assists businesses and individuals with complex tax, audit, business management, wealth…”

Source: company website · checked Sep 5, 2026
10
Drda, LLCStrong evidence
Houston, TX, United StatesHQ checked Sep 5, 202611-5091

“DRDA, LLC is a full-service accounting firm serving clients throughout the area, dedicated to providing our clients with professional, personalized services and guidance in a wide…”

Source: company website · checked Sep 5, 2026
11
Clutch GroupIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 2026n/a90

“A company that provides business services.”

Source: company website · checked Sep 5, 2026
12
Hrss CpasIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 202651-20087

“HRSS is a full-service accounting, tax, audit, and advisory firm with 40 years of experience serving businesses and individuals, with a focus on middle-market clients.”

Source: company website · checked Sep 5, 2026
13Houston, TX, United StatesHQ checked Sep 5, 202651-20081

“Accounting, auditing and tax services to public companies, non-public companies and their owners, not-for-profits and employee benefit plans”

Source: company website · checked Sep 5, 2026
14Houston, TX, United StatesHQ checked Sep 5, 202611-5077

“We are a business advisory and consulting company focused on delivering iMPACTful solutions and innovation to public and private sector clients that empower them to achieve…”

Source: company website · checked Sep 5, 2026
15Houston, TX, United StatesHQ checked Sep 5, 202651-20070
Source: company website · checked Sep 5, 2026
16
Petral Consulting CompanyIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 2026n/a64

“provides descriptions of ongoing consulting services, special projects, and areas of consulting expertise,”

Source: company website · checked Sep 5, 2026
17
HugheswattersaskanaseIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 202651-20063

“HWA has extensive experience in Banking Representation, Business Planning and Strategy, Business Bankruptcy, Bankruptcy Trustee Representation, Commercial Finance, Commercial…”

Source: company website · checked Sep 5, 2026
18Houston, TX, United StatesHQ checked Sep 5, 202651-20057

“At MGA, our approach is simple.”

Source: company website · checked Sep 5, 2026
19
Mohle Adams LLPStrong evidence
Houston, TX, United StatesHQ checked Sep 5, 202611-5053

“One of the largest local public accounting firms in Houston, Mohle Adams has provided professional counsel to Texas companies and residents to help them achieve their business and…”

Source: company website · checked Sep 5, 2026
20Houston, TX, United StatesHQ checked Sep 5, 202611-5052

“Since the firm’s inception in 1896 and from its offices in Houston, Texas, Crady Jewett McCulley & Houren LLP has provided comprehensive legal counsel to businesses and…”

Source: company website · checked Sep 5, 2026
21
Desroches PartnersIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 202611-5049

“Desroches Partners, LLP, located in the I-10 Energy Corridor of West Houston, offers a complete range of tax, assurance and consulting services to a diverse portfolio of clients.”

Source: company website · checked Sep 5, 2026
22
PKF TexasIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 202651-20045

“Appreciation is, in some ways, an unusual commitment from a business-oriented accounting firm.”

Source: company website · checked Sep 5, 2026
23Houston, TX, United StatesHQ checked Sep 5, 202651-20044

“Our mission at Fitts Roberts & Co.”

Source: company website · checked Sep 5, 2026
24Houston, TX, United StatesHQ checked Sep 5, 202611-5041

“At HTL CPAs, we offer comprehensive accounting services to help businesses of all sizes achieve their financial goals.”

Source: company website · checked Sep 5, 2026
25
Eikon-XIndirect evidence
Houston, TX, United StatesHQ checked Sep 5, 202611-5033

“We are a new generation of consulting practice, dedicated to driving impact.”

Source: company website · checked Sep 5, 2026

Showing 25 of 420 professional services firms based in Houston, United States

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Professional services firms based in Houston, United States at a glance

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

Companies by employee count

1-10
289
11-50
104
51-200
20
201-500
5
501-1,000
1

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 420 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 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 Houston, 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 Houston 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, 1,685 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 in the United States

Frequently asked

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

RevenueBase identified 420 professional services firms headquartered in Houston, 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?

Gray Reed, headquartered in Houston, 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 1,685 verified decision-maker contacts tracked across these 420 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.

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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.