Company lists · Data refreshed September 2026

Top 25 Quality and compliance consulting firms based in the United States

Name: Quality and compliance consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 2,405 companies tracked

RevenueBase identified 2,405 quality and compliance consulting firms headquartered in the United States as of September 2026 and tracks 21,308 professional contacts across them, including 6,548 with verified work emails. Houston is the largest hub.

This list covers quality and compliance consulting 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 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 21, 2026 86% judged on-target in blind review

2,405Companies

21,308Contacts tracked

6,548Verified emails

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The 25 largest quality and compliance consulting firms based in the United States

Ranked by team size

Top 25 of 2,405 quality and compliance consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to quality and compliance consulting 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	Paragon	Partial evidence	Cranford, NJ, United StatesHQ checked Sep 21, 2026	501-1,000	936 contacts →
	Partial evidence “Paragon is a now part of CGI (cgi.com), a global IT and business consulting services firm.” Source: RevenueBase Database · checked Sep 21, 2026
2	Bureau Veritas Primary Integration	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	201-500	651 contacts →
	Indirect evidence “Founded in 2005, the vision behind Primary Integration (PI) was to build the most elite mission critical commissioning/data center commissioning and operational risk management…” Source: RevenueBase Database · checked Sep 21, 2026
3	Safety Management Group	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 21, 2026	201-500	485 contacts →
	Partial evidence “We are people-centric Quality, Health, Safety, and Environmental (QHSE) consultants driven to reduce risk, foster sustainable operations, and enhance safety culture to protect…” Source: RevenueBase Database · checked Sep 21, 2026
4	E4health	Indirect evidence	Wyomissing, PA, United StatesHQ checked Sep 21, 2026	501-1,000	364 contacts →
	Indirect evidence “For more than 20 years, e4health has partnered with 400+ health systems and provider organizations nationwide, delivering exceptional solutions across Health IT, HIM, Coding…” Source: RevenueBase Database · checked Sep 21, 2026
5	APA Engineering INC	Partial evidence	Mount Laurel, NJ, United StatesHQ checked Sep 21, 2026	201-500	364 contacts →
	Partial evidence “APA Engineering Inc has been a leader in providing Compliance, Engineering, IT, and Sourcing services since With over twenty years in business, we are dedicated to providing the…” Source: RevenueBase Database · checked Sep 21, 2026
6	Quality Professionals Q-Pros	Partial evidence	TX, United StatesHQ checked Sep 21, 2026	501-1,000	347 contacts →
	Partial evidence “Quality Professionals (Q-Pros) is a global independent software Quality Assurance and Testing services provider supporting enterprise and government organizations.” Source: RevenueBase Database · checked Sep 21, 2026
7	VMG Health	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	201-500	336 contacts →
	Indirect evidence “At VMG Health, we’re more than just a team of experts; we’re trusted partners in the business of healthcare.” Source: RevenueBase Database · checked Sep 21, 2026
8	Verista	Strong evidence	Fishers, IN, United StatesHQ checked Sep 21, 2026	501-1,000	323 contacts →
	Strong evidence “Verista is a leading business and technology consultancy firm that provides systems, compliance, validation and quality solutions to life science companies - enabling them to…” Source: RevenueBase Database · checked Sep 21, 2026
9	Registrar Corp	Partial evidence	Hampton, VA, United StatesHQ checked Sep 21, 2026	51-200	317 contacts →
	Partial evidence “Registrar Corp is your trusted partner helping you navigate global regulatory requirements with expert services, innovative software solutions and comprehensive online compliance…” Source: RevenueBase Database · checked Sep 21, 2026
10	Vaisesika	Strong evidence	Carlsbad, CA, United StatesHQ checked Sep 21, 2026	201-500	266 contacts →
	Strong evidence “Vaisesika Consulting is a global tech and consulting firm that helps businesses transform their digital setups and stay compliant in a straightforward way.” Source: RevenueBase Database · checked Sep 21, 2026
11	Valsource INC	Indirect evidence	Downingtown, PA, United StatesHQ checked Sep 21, 2026	201-500	245 contacts →
	Indirect evidence “Since 1996, ValSource has worked with hundreds of pharmaceutical, biopharma, and medical device organizations around the world.” Source: RevenueBase Database · checked Sep 21, 2026
12	Sonic Systems	Strong evidence	Wilmington, NC, United StatesHQ checked Sep 21, 2026	501-1,000	245 contacts →
	Strong evidence “Founded in 1977 Sonic Systems International (SSI) is a full-service quality-consulting firm serving the nuclear power generation utility industry.” Source: RevenueBase Database · checked Sep 21, 2026
13	Kymanox	Indirect evidence	Morrisville, NC, United StatesHQ checked Sep 21, 2026	201-500	239 contacts →
	Indirect evidence “Kymanox (‘ki-mah-noks’), meaning Ideal Knowledge Transfer, is your trusted partner in advancing life science innovation.” Source: RevenueBase Database · checked Sep 21, 2026
14	Mcra, An Iqvia Business	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	226 contacts →
	Partial evidence “MCRA, an IQVIA business, is a leading full-service medical device, diagnostics, and biologics CRO and consulting advisory firm helping global healthcare companies maximize the…” Source: RevenueBase Database · checked Sep 21, 2026
15	PRO QC International	Partial evidence	Mchenry, IL, United StatesHQ checked Sep 21, 2026	501-1,000	211 contacts →
	Partial evidence “Pro QC International provides tailored quality solutions with a human touch in 100 countries.” Source: RevenueBase Database · checked Sep 21, 2026
16	Lachman Consultant Services	Strong evidence	Westbury, NY, United StatesHQ checked Sep 21, 2026	51-200	179 contacts →
	Strong evidence “Quality & Compliance \| Regulatory Strategy \| Inspection Readiness & Remediation \| Data Integrity.” Source: RevenueBase Database · checked Sep 21, 2026
17	Provider Resources, LLC	Partial evidence	Erie, PA, United StatesHQ checked Sep 21, 2026	201-500	170 contacts →
	Partial evidence “Provider Resources, LLC (PRI) offers the federal healthcare space expert services in medical review and program integrity measures, education and training, healthcare quality…” Source: RevenueBase Database · checked Sep 21, 2026
18	SSI Strategy	Indirect evidence	Parsippany, NJ, United StatesHQ checked Sep 21, 2026	51-200	169 contacts →
	Indirect evidence “At SSI Strategy, we're strategic partners deeply invested in our clients' success.” Source: RevenueBase Database · checked Sep 21, 2026
19	EAC Consulting, INC	Indirect evidence	Miami, FL, United StatesHQ checked Sep 21, 2026	51-200	142 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
20	HCPRO	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	201-500	136 contacts →
	Indirect evidence “HCPro, LLC.” Source: RevenueBase Database · checked Sep 21, 2026
21	MMR Consulting	Partial evidence	Carlsbad, CA, United StatesHQ checked Sep 21, 2026	51-200	124 contacts →
	Partial evidence “MMR Consulting Inc.” Source: RevenueBase Database · checked Sep 21, 2026
22	Total Validation Services	Partial evidence	Moraga, CA, United StatesHQ checked Sep 21, 2026	11-50	120 contacts →
	Partial evidence “Total Validation Services (TVS) is an industry leader in delivering practical and cost-effective commissioning, qualification, and validation solutions, in addition to project…” Source: RevenueBase Database · checked Sep 21, 2026
23	Validant	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	201-500	120 contacts →
	Indirect evidence “Validant has joined forces with our partner consultancy groups to reposition as one global regulatory brand: ELIQUENT Life Sciences.” Source: RevenueBase Database · checked Sep 21, 2026
24	Qualio	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	51-200	119 contacts →
	Strong evidence “Qualio is a unified quality and compliance management platform that helps regulated organizations get products to market faster with reduced risk.” Source: RevenueBase Database · checked Sep 21, 2026
25	Pinnacle Healthcare Consulting	Partial evidence	Centennial, CO, United StatesHQ checked Sep 21, 2026	201-500	114 contacts →
	Partial evidence “Pinnacle is a nationally recognized healthcare consulting firm with locations across the country.” Source: RevenueBase Database · checked Sep 21, 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: quality and compliance consulting 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 quality and compliance consulting firms.
Partial evidence: Its own public description names part of quality and compliance consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name quality and compliance consulting 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 2,405 quality and compliance consulting firms based in the United States

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Quality and compliance consulting firms based in the United States at a glance

As of Sep 21, 2026

30.7%Verified-email coverage

8.9Average contacts per company

1-10Median size (employees)

1.9%Largest-city concentration · Houston

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

1,732

11-50

499

51-200

118

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 2,405 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 quality and compliance consulting 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 the United States whose own description of what they do matches “quality and compliance consulting 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 quality and compliance consulting 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 quality and compliance consulting 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 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, 6,548 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 21, 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.

Quality and compliance consulting firms by metro

Quality and compliance consulting firms in Houston46
Quality and compliance consulting firms in New York45
Quality and compliance consulting firms in Boston35
Quality and compliance consulting firms in San Diego31
Quality and compliance consulting firms in Los Angeles30
Quality and compliance consulting firms in Atlanta27
Quality and compliance consulting firms in Chicago25

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 quality and compliance consulting 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 quality and compliance consulting firms are there based in the United States?

RevenueBase identified 2,405 quality and compliance consulting 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?

Paragon, headquartered in Cranford, tops this list with the largest team on record.

Which city has the most quality and compliance consulting firms?

Houston leads with 46 headquartered companies, followed by New York (45) and Boston (35).

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 6,548 verified decision-maker contacts tracked across these 2,405 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 21, 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.