Company lists · Data refreshed September 2026

Top 25 Professional services firms based in Houston, United States

Name: Professional services firms based in Houston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 420 companies tracked

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, its RevenueBase Smart Search rating, 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 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 5, 2026 86% judged on-target in blind review

420Companies

5,880Contacts tracked

1,685Verified emails

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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. RevenueBase Smart Search rates how each company's information relates to professional services firms: 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	Gray Reed	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	201-500	314 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
2	Mayatax	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	501-1,000	269 contacts →
	Indirect evidence “Growth exposes financial weakness.” Source: RevenueBase Database · checked Sep 5, 2026
3	Sirius Solutions	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	201-500	231 contacts →
	Indirect evidence “eTeam Sirius Solutions L.L.C.” Source: RevenueBase Database · checked Sep 5, 2026
4	Calvetti Ferguson	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	198 contacts →
	Indirect evidence “Calvetti Ferguson is one of the largest independent CPA firms in the United States.” Source: RevenueBase Database · checked Sep 5, 2026
5	Melton & Melton, LLP	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	157 contacts →
	Indirect evidence “Melton & Melton is an independent, Houston-based public accounting firm with diverse audit, tax and client accounting practices.” Source: RevenueBase Database · checked Sep 5, 2026
6	Accounting Solutions	Indirect evidence	Houston, PA, United StatesHQ checked Sep 5, 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 5, 2026
7	Malonebailey, LLP	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	125 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
8	EEPB	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	96 contacts →
	Indirect evidence “EEPB is one of Houston's largest local CPA firms offering a wide range of services to individuals and businesses.” Source: RevenueBase Database · checked Sep 5, 2026
9	Weinstein Spira	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	95 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
10	Drda, LLC	Strong evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	91 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 5, 2026
11	Clutch Group	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	n/a	90 contacts →
	Indirect evidence “A company that provides business services.” Source: RevenueBase Database · checked Sep 5, 2026
12	Hrss Cpas	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	87 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
13	Ham, Langston & Brezina, L.L.P	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	81 contacts →
	Indirect evidence “Accounting, auditing and tax services to public companies, non-public companies and their owners, not-for-profits and employee benefit plans” Source: RevenueBase Database · checked Sep 5, 2026
14	Mpact Strategic Consulting LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	77 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
15	Harper & Pearson Company, P.C	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	70 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 5, 2026
16	Petral Consulting Company	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	n/a	64 contacts →
	Indirect evidence “provides descriptions of ongoing consulting services, special projects, and areas of consulting expertise,” Source: RevenueBase Database · checked Sep 5, 2026
17	Hugheswattersaskanase	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	63 contacts →
	Indirect evidence “HWA has extensive experience in Banking Representation, Business Planning and Strategy, Business Bankruptcy, Bankruptcy Trustee Representation, Commercial Finance, Commercial…” Source: RevenueBase Database · checked Sep 5, 2026
18	Miller Grossbard Advisors, LLP	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	57 contacts →
	Indirect evidence “At MGA, our approach is simple.” Source: RevenueBase Database · checked Sep 5, 2026
19	Mohle Adams LLP	Strong evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	53 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 5, 2026
20	Crady Jewett Mcculley & Houren LLP	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	52 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
21	Desroches Partners	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	49 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
22	PKF Texas	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	45 contacts →
	Indirect evidence “Appreciation is, in some ways, an unusual commitment from a business-oriented accounting firm.” Source: RevenueBase Database · checked Sep 5, 2026
23	Fitts, Roberts, Kolkhorst & Co., P.C	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	44 contacts →
	Indirect evidence “Our mission at Fitts Roberts & Co.” Source: RevenueBase Database · checked Sep 5, 2026
24	HTL Cpas & Business Advisors	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	41 contacts →
	Indirect evidence “At HTL CPAs, we offer comprehensive accounting services to help businesses of all sizes achieve their financial goals.” Source: RevenueBase Database · checked Sep 5, 2026
25	Eikon-X	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	33 contacts →
	Indirect evidence “We are a new generation of consulting practice, dedicated to driving impact.” Source: RevenueBase Database · checked Sep 5, 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: professional services firms. 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 professional services firms.
Partial evidence: Its own public description names part of professional services firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name professional services firms. 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 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

28.7%Verified-email coverage

14.0Average contacts per company

1-10Median size (employees)

141.2%Largest-city concentration · New York

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

289

11-50

104

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Houston, 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 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 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.
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 professional services firms), 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 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 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, 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

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 professional services firms, 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 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 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.