Company lists · Data refreshed September 2026

Top 25 Constitutional law firms based in Houston, United States

RevenueBase identified 64 company matches for constitutional law firms associated with Houston, United States as of September 2026 and tracks 650 professional contacts across them, including 294 with verified work emails and 228 with mobile numbers. Across the United States, New York is the largest hub for this category (152 companies); Houston has 63.

This list covers company matches for constitutional law firms associated with Houston, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 8, 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 RevenueBase SmartSearch · Exact Recorded Sep 8, 2026 How this list was built
64Companies
650Contacts tracked
294Verified emails
228Mobile numbers
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The 25 largest constitutional law firms based in Houston, United States

Ranked by team size
Top 25 of 64 company matches for constitutional law firms based in Houston, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 8, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHouston, TX, United StatesHQ recorded Sep 8, 202651-200208 contacts →

Exact match

“For over 25 years, Johnson Law Group has been committed to delivering exceptional legal services with integrity, professionalism, and a client-focused approach.”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
2Exact matchHouston, TX, United StatesHQ recorded Sep 8, 202651-20087 contacts →

Exact match

“Williams Hart & Boundas, LLP is a Houston-based personal injury law firm founded in 1985.”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
3Exact matchHouston, TX, United StatesHQ recorded Sep 8, 202651-20055 contacts →

Exact match

“We work daily in the courts, legislatures and in the community to defend and preserve the individual rights and liberties guaranteed to every person in this country by the…”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
4Exact matchHouston, TX, United StatesHQ recorded Sep 8, 202651-20054 contacts →

Exact match

“Facing legal challenges?”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
5Exact matchHouston, TX, United StatesHQ recorded Sep 8, 202611-5025 contacts →

Exact match

“Coane and Associates, PLLC, was founded in 1983 to deliver the highest quality of legal services in employment and labor law, immigration law, civil and business litigation, and…”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
6Exact matchHouston, TX, United StatesHQ recorded Sep 8, 202611-5020 contacts →

Exact match

“Sullo & Sullo, LLP Attorneys at Law is a privately held company established in by brothers Andrew and Greg Sullo.”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
7Exact matchHouston, TX, United StatesHQ recorded Sep 8, 20261-1012 contacts →

Exact match

“Founded by veterans of big law firms, academic medical centers, and public company board rooms, Nichols Weitzner Thomas LLP leverages its knowledge and experience to counsel…”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
8Exact matchHouston, TX, United StatesHQ recorded Sep 8, 20261-1010 contacts →

Exact match

“Gerger Hennessy Martin & Peterson represents clients in their most important and sensitive legal matters.”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
9Exact matchHouston, TX, United StatesHQ recorded Sep 8, 202611-5010 contacts →

Exact match

“At Alonge Law Firm, we provide creative solutions to difficult legal problems.”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
10Exact matchHouston, TX, United StatesHQ recorded Sep 8, 202611-509 contacts →

Exact match

“With 20 years of dynamic experience, the Daniels Legals Group is a general practice firm with concentrations in Immigration Law, Family Law, Criminal Defense, and Personal…”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
11Exact matchHouston, TX, United StatesHQ recorded Sep 8, 20261-107 contacts →

Exact match

“The advice and representation we provide our clients is based on years of experience helping individuals and organizations deal with crises both large and small.”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
12Exact matchHouston, TX, United StatesHQ recorded Sep 8, 20261-107 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
13Exact matchHouston, TX, United StatesHQ recorded Sep 8, 202611-507 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
14Exact matchHouston, TX, United StatesHQ recorded Sep 8, 202611-507 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
15Exact matchHouston, TX, United StatesHQ recorded Sep 8, 20261-107 contacts →

Exact match

“Clark Martin has a diverse background giving him a unique perspective he brings to every case.”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
16Exact matchHouston, TX, United StatesHQ recorded Sep 8, 202611-507 contacts →

Exact match

“We are a law firm and legal warriors who practice in the areas of personal injury, civil rights, business law, real estate, and tax strategy.”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
17Exact matchHouston, TX, United StatesHQ recorded Sep 8, 20261-106 contacts →

Exact match

“Leo & Oginni Trial Lawyers, PLLC is a Texas based firm with its principal office located in Houston, Texas.”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
18Exact matchHouston, TX, United StatesHQ recorded Sep 8, 20261-106 contacts →

Exact match

“The Giron Kirby Law Group is a full-service, multi-disciplinary law firm whose Texas attorneys provide quality, client-focused solutions to legal issues, big or small.”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
19Exact matchHouston, TX, United StatesHQ recorded Sep 8, 202611-506 contacts →

Exact match

“Steve Shellist is a fierce trial attorney.”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
20Exact matchHouston, TX, United StatesHQ recorded Sep 8, 20261-106 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
21Exact matchHouston, TX, United StatesHQ recorded Sep 8, 20261-106 contacts →

Exact match

“A nationwide boutique law firm focusing solely on protecting the rights of federal employees and their families.”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
22Exact matchHouston, TX, United StatesHQ recorded Sep 8, 20261-105 contacts →

Exact match

“EVERY YEAR, UNITED STATES IMMIGRATION LAWS CHANGE AND BECOME MORE COMPLEX.”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
23Exact matchHouston, TX, United StatesHQ recorded Sep 8, 202611-503 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
24Exact matchHouston, TX, United StatesHQ recorded Sep 8, 20261-103 contacts →

Exact match

“At the Schiffer Law Firm, Texas attorneys Paul and Jacob Schiffer together have over 45 years of combined legal experience and descend from a dynasty of American lawyers going…”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase
25Exact matchHouston, TX, United StatesHQ recorded Sep 8, 20261-103 contacts →

Exact match

“Our firm works hard to protect your rights.”

Recorded in the RevenueBase company graph · Sep 8, 2026 · View company records in RevenueBase

Showing 25 of 64 constitutional law firms based in Houston, United States

See the full list, filter by size, metro and specialty, and access 294 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Constitutional law firms based in Houston, United States at a glance

As of Sep 8, 2026
45.2%Verified-email coverage
35.1%Mobile-number coverage
10.2Average contacts per company
1-10Median size (employees)
Sep 8, 2026Page data refreshed

Companies by employee count

1-10
45
11-50
14
51-200
4

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 10.5d

Company record updated

Median 66.0d

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with Houston, United States whose business descriptions match “constitutional law firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 294 professional contacts with verified work emails across the full matched dataset. 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 8, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “constitutional law firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many constitutional law firms are there based in Houston, United States?

RevenueBase identified 64 company matches for constitutional law firms associated with Houston, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Johnson LAW Group tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most constitutional law firms?

New York leads the United States with 152 company records, followed by Washington (94) and Los Angeles (72). Houston has 63.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 294 professional contacts with verified work emails tracked across these 64 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 8, 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.