Company lists · Data refreshed September 2026

Top 25 Quality assurance consulting firms based in the United States

RevenueBase identified 1,332 company matches for quality assurance consulting firms associated with the United States as of September 2026 and tracks 15,534 professional contacts across them, including 3,610 with verified work emails. Houston is the largest hub.

This list covers company matches for quality assurance consulting firms associated with the 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 29, 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 29, 2026 How this list was built
1,332Companies
15,534Contacts tracked
3,610Verified emails
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The 25 largest quality assurance consulting firms based in the United States

Ranked by team size
Top 25 of 1,332 company matches for quality assurance consulting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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 matchDecatur, GA, United StatesHQ recorded Sep 29, 20261,001-5,000980 contacts →

Exact match

“a1qa is a global software testing and QA outsourcing company trusted by IT firms and Fortune 500 enterprises to deliver software quality that holds under real-world pressure.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2Exact matchPleasanton, CA, United StatesHQ recorded Sep 29, 20261,001-5,000906 contacts →

Exact match

“QASource is a leading provider of outsourced software quality engineering services, offering scalable and customizable QA solutions to clients worldwide.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3Exact matchMclean, VA, United StatesHQ recorded Sep 29, 2026201-500651 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4Exact matchIndianapolis, IN, United StatesHQ recorded Sep 29, 2026201-500485 contacts →

Exact match

“We are people-centric Quality, Health, Safety, and Environmental (QHSE) consultants driven to reduce risk, foster sustainable operations, and enhance safety culture to protect…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5Exact matchIndianapolis, IN, United StatesHQ recorded Sep 29, 2026501-1,000417 contacts →

Exact match

“iLAB specializes in Software Quality Assurance services, providing global solutions to our customers.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6Exact matchFalls Church, VA, United StatesHQ recorded Sep 29, 202651-200415 contacts →

Exact match

“For 15 years, Astegic has been helping Fortune 500 through startup companies with their Testing & QA needs.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchSan Mateo, CA, United StatesHQ recorded Sep 29, 2026501-1,000403 contacts →

Exact match

“We are celebrating 30 years of testing excellence and innovation at LogiGear, we're proud to be a cornerstone in our clients' journeys, delivering confidence not just in our…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8Exact matchTX, United StatesHQ recorded Sep 29, 2026501-1,000347 contacts →

Exact match

“Quality Professionals (Q-Pros) is a global independent software Quality Assurance and Testing services provider supporting enterprise and government organizations.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9Exact matchCarlsbad, CA, United StatesHQ recorded Sep 29, 2026201-500266 contacts →

Exact match

“Vaisesika Consulting is a global tech and consulting firm that helps businesses transform their digital setups and stay compliant in a straightforward way.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10Exact matchDowningtown, PA, United StatesHQ recorded Sep 29, 2026201-500245 contacts →

Exact match

“Since 1996, ValSource has worked with hundreds of pharmaceutical, biopharma, and medical device organizations around the world.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11Exact matchWilmington, NC, United StatesHQ recorded Sep 29, 2026501-1,000245 contacts →

Exact match

“Founded in 1977 Sonic Systems International (SSI) is a full-service quality-consulting firm serving the nuclear power generation utility industry.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12Exact matchMchenry, IL, United StatesHQ recorded Sep 29, 2026501-1,000211 contacts →

Exact match

“Pro QC International provides tailored quality solutions with a human touch in 100 countries.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13Exact matchPlano, United StatesHQ recorded Sep 29, 2026201-500181 contacts →

Exact match

“Welcome to ImpactQA – Where Excellence Meets Innovation in Software Testing and QA Consulting About Us ImpactQA is a premier Software Testing and QA consultancy delivering…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14Exact matchWestbury, NY, United StatesHQ recorded Sep 29, 202651-200179 contacts →

Exact match

“Quality & Compliance | Regulatory Strategy | Inspection Readiness & Remediation | Data Integrity.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15Exact matchBoise, ID, United StatesHQ recorded Sep 29, 202651-200157 contacts →

Exact match

“QualityLogic delivers full spectrum QA products and services to technology companies in rapidly evolving markets, or where transformative technologies are changing the world.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchPearland, TX, United StatesHQ recorded Sep 29, 202651-200147 contacts →

Exact match

“Welcome to ConvexTech INC, an IT consulting company, Leading in SAP Solutions & Expertise with over a decade of experience.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17Exact matchMiami, FL, United StatesHQ recorded Sep 29, 202651-200142 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18Exact matchJacksonville, FL, United StatesHQ recorded Sep 29, 202651-200136 contacts →

Exact match

“We deliver Quality Intelligence for engineering teams.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19Exact matchRedmond, WA, United StatesHQ recorded Sep 29, 202651-200128 contacts →

Exact match

“FleXasoft is a Redmond, Washington based software consulting firm specializing in Software Development and Quality Assurance Testing.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20Exact matchSalt Lake City, UT, United StatesHQ recorded Sep 29, 2026201-500124 contacts →

Exact match

“IDFL Institute and Laboratory is the global leader in filled textile quality assurance services.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21Exact matchEvanston, IL, United StatesHQ recorded Sep 29, 202651-200114 contacts →

Exact match

“Aspiritech is a premier quality assurance and testing services company located in metropolitan Chicago.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22Exact matchMiami, FL, United StatesHQ recorded Sep 29, 2026201-500106 contacts →

Exact match

“Masuu with over 280 Subject Matter Experts (SMEs) and a leadership/scientific advisory team featuring former personnel from health authorities like the USFDA, EMA, MHRA, ANVISA…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchMoon Township, PA, United StatesHQ recorded Sep 29, 202651-200103 contacts →

Exact match

“We are leading experts in materials quality assurance and quality control inspection, construction management and construction inspection, coatings inspection, training and…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24Exact matchFort Lauderdale, FL, United StatesHQ recorded Sep 29, 2026201-500102 contacts →

Exact match

“Quality Built, LLC began in in 1994, and for more than 20 years, we have been recognized as the nation's most innovative leader in the area of construction quality assurance and…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25Exact matchTomball, TX, United StatesHQ recorded Sep 29, 202651-20097 contacts →

Exact match

“With offices in Texas, Alaska, and Italy, Hawk specializes in project management and QA/QC services for owners, contractors, developers and engineers.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 1,332 quality assurance consulting firms based in the United States

See the full list, filter by size, metro and specialty, and access 3,610 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Quality assurance consulting firms based in the United States at a glance

As of Sep 29, 2026
23.2%Verified-email coverage
11.7Average contacts per company
1-10Median size (employees)
3.0%Largest-city concentration · Houston
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
966
11-50
239
51-200
88
201-500
21
501-1,000
13
1,001-5,000
3
5,001-10,000
1

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 1,332 companies.

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 the United States whose business descriptions match “quality assurance consulting 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 3,610 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 29, 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.

Quality assurance consulting firms by metro

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 “quality assurance consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many quality assurance consulting firms are there based in the United States?

RevenueBase identified 1,332 company matches for quality assurance consulting firms associated with the 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?

A1qa tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most quality assurance consulting firms?

Houston leads with 40 company records, followed by San Diego (23) and Los Angeles (22).

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 3,610 professional contacts with verified work emails tracked across these 1,332 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 29, 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.