Company lists · Data refreshed September 2026

Top 25 Automotive quality assurance firms based in the United States

Name: Automotive quality assurance 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 30, 2026 248 companies tracked

RevenueBase identified 248 automotive quality assurance firms headquartered in the United States as of September 2026 and tracks 10,900 professional contacts across them, including 1,748 with verified work emails. Los Angeles is the largest hub.

This list covers automotive quality assurance 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 30, 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 30, 2026 86% judged on-target in blind review

248Companies

10,900Contacts tracked

1,748Verified emails

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The 25 largest automotive quality assurance firms based in the United States

Ranked by team size

Top 25 of 248 automotive quality assurance firms based in the United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to automotive quality assurance 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	Stratosphere Quality	Strong evidence	Fishers, IN, United StatesHQ checked Sep 30, 2026	1,001-5,000	1,553 contacts →
	Strong evidence “Stratosphere Quality, founded in 2009, is a major global provider of quality assurance and outsourcing solutions, such as sorting and inspection services, to manufacturers of…” Source: RevenueBase Database · checked Sep 30, 2026
2	A1qa	Partial evidence	Decatur, GA, United StatesHQ checked Sep 30, 2026	1,001-5,000	980 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 30, 2026
3	TÜV Rheinland North America	Indirect evidence	Boxborough, MA, United StatesHQ checked Sep 30, 2026	501-1,000	712 contacts →
	Indirect evidence “TÜV Rheinland is a world leader in testing, inspection and certification services for a wide variety of industries.” Source: RevenueBase Database · checked Sep 30, 2026
4	Vayan Group, LLC	Strong evidence	Sterling Heights, MI, United StatesHQ checked Sep 30, 2026	1,001-5,000	476 contacts →
	Strong evidence “Vayan Group, LLC is a leading provider of technology-driven quality assurance solutions for OEMs, Tier 1 and Tier 2 suppliers across the automotive, aerospace, electronics…” Source: RevenueBase Database · checked Sep 30, 2026
5	Astegic	Indirect evidence	Falls Church, VA, United StatesHQ checked Sep 30, 2026	51-200	415 contacts →
	Indirect evidence “For 15 years, Astegic has been helping Fortune 500 through startup companies with their Testing & QA needs.” Source: RevenueBase Database · checked Sep 30, 2026
6	Logigear Corporation	Indirect evidence	San Mateo, CA, United StatesHQ checked Sep 30, 2026	501-1,000	403 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 30, 2026
7	Kett Engineering Corporation	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 30, 2026	501-1,000	250 contacts →
	Partial evidence “Kett Engineering Corporation has been operating for over 60 years and has spent the past 28 years dedicating its services to supporting the automotive testing and staffing needs…” Source: RevenueBase Database · checked Sep 30, 2026
8	Q Analysts	Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 30, 2026	201-500	249 contacts →
	Partial evidence “Quality in An AI Driven World.” Source: RevenueBase Database · checked Sep 30, 2026
9	Amci Global	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 30, 2026	201-500	242 contacts →
	Partial evidence “AMCI is an automotive marketing consulting firm made up of automotive experts and enthusiasts.” Source: RevenueBase Database · checked Sep 30, 2026
10	MGA Research Corporation	Indirect evidence	Akron, NY, United StatesHQ checked Sep 30, 2026	201-500	224 contacts →
	Indirect evidence “MGA is recognized worldwide as one of the leading independent providers of testing services and equipment.” Source: RevenueBase Database · checked Sep 30, 2026
11	PRO QC International	Partial evidence	Mchenry, IL, United StatesHQ checked Sep 30, 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 30, 2026
12	PRI Performance Review Institute	Indirect evidence	Warrendale, PA, United StatesHQ checked Sep 30, 2026	51-200	200 contacts →
	Indirect evidence “Performance Review Institute® (PRI℠) is headquartered in Pittsburgh, Pennsylvania in the USA, with offices in London, UK to serve Europe and in Beijing, China and Aichi, Japan…” Source: RevenueBase Database · checked Sep 30, 2026
13	Apple Autos	Strong evidence	Apple Valley, MN, United StatesHQ checked Sep 30, 2026	501-1,000	171 contacts →
	Strong evidence “Our goal is to be an industry leader in providing unmatched quality automotive products and services.” Source: RevenueBase Database · checked Sep 30, 2026
14	Abstracta	Partial evidence	Jacksonville, FL, United StatesHQ checked Sep 30, 2026	51-200	136 contacts →
	Partial evidence “We deliver Quality Intelligence for engineering teams.” Source: RevenueBase Database · checked Sep 30, 2026
15	Team Quality Services	Indirect evidence	Auburn, IN, United StatesHQ checked Sep 30, 2026	201-500	132 contacts →
	Indirect evidence “We're there, so our customers don’t have to be.” Source: RevenueBase Database · checked Sep 30, 2026
16	Aisin Technical Center Of America, INC	Indirect evidence	Northville, MI, United StatesHQ checked Sep 30, 2026	51-200	93 contacts →
	Indirect evidence “As the first technical center established by Aisin Seiki outside of Japan, ATC-A leads Aisin's product development for the North, Central and South American marketplace, providing…” Source: RevenueBase Database · checked Sep 30, 2026
17	Sustained Quality	Strong evidence	South Bend, IN, United StatesHQ checked Sep 30, 2026	51-200	83 contacts →
	Strong evidence “Sustained Quality has been a trusted partner in quality since 2007, delivering inspection, sorting, rework/repair, engineering, and containment services to the automotive…” Source: RevenueBase Database · checked Sep 30, 2026
18	TRP Laboratories	Indirect evidence	Troy, MI, United StatesHQ checked Sep 30, 2026	51-200	70 contacts →
	Indirect evidence “TRP Laboratories provides standard and custom testing services across the United States.” Source: RevenueBase Database · checked Sep 30, 2026
19	GMB North America, INC	Partial evidence	Burlington, NJ, United StatesHQ checked Sep 30, 2026	51-200	65 contacts →
	Partial evidence “GMB is one of the world's largest manufacturers of aftermarket automotive products ranging from water pumps, fuel pumps, universal joints, tensioner & idler bearings, to wheel hub…” Source: RevenueBase Database · checked Sep 30, 2026
20	ZT Automotive	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	201-500	63 contacts →
	Partial evidence “ZT Automotive is a leading automotive group committed to delivering excellence through Integrity, Growth, Innovation, and Consistency.” Source: RevenueBase Database · checked Sep 30, 2026
21	Viking Products, INC	Indirect evidence	Grand Rapids, MI, United StatesHQ checked Sep 30, 2026	51-200	54 contacts →
	Indirect evidence “Viking Products is a privately held IATF 16949/ISO 14001 certified supplier.” Source: RevenueBase Database · checked Sep 30, 2026
22	ONE Guard Inspections	Indirect evidence	Plano, TX, United StatesHQ checked Sep 30, 2026	11-50	50 contacts →
	Indirect evidence “Our extensive nationwide network, innovative services, and cutting-edge technology make your inspection process faster, more convenient, and hassle-free.” Source: RevenueBase Database · checked Sep 30, 2026
23	Quality Team 1	Partial evidence	Highland Park, MI, United StatesHQ checked Sep 30, 2026	201-500	49 contacts →
	Partial evidence “Quality Team 1 is an international ISO 9001-2008 registered service company specializing in inspection and containment with locations in the United States, Canada, and Mexico.” Source: RevenueBase Database · checked Sep 30, 2026
24	BAY Area Compliance Laboratories, Corp	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 30, 2026	11-50	45 contacts →
	Indirect evidence “Since 1996, Bay Area Compliance Laboratories Corp.” Source: RevenueBase Database · checked Sep 30, 2026
25	Quality Auditing LLC	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 30, 2026	11-50	43 contacts →
	Partial evidence “Quality Auditing LLC is the industry leader in Quality Management System Auditing & Consulting for clients in highly-regulated industries, including Medical Device…” Source: RevenueBase Database · checked Sep 30, 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: automotive quality assurance 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 automotive quality assurance firms.
Partial evidence: Its own public description names part of automotive quality assurance firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name automotive quality assurance 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 248 automotive quality assurance firms based in the United States

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Automotive quality assurance firms based in the United States at a glance

As of Sep 30, 2026

16.0%Verified-email coverage

44.0Average contacts per company

11-50Median size (employees)

2.8%Largest-city concentration · Los Angeles

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

118

11-50

51-200

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 248 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 automotive quality assurance 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 “automotive quality assurance 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 automotive quality assurance 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 automotive quality assurance 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, 1,748 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 30, 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.

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 automotive quality assurance 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 automotive quality assurance firms are there based in the United States?

RevenueBase identified 248 automotive quality assurance 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?

Stratosphere Quality, headquartered in Fishers, tops this list with the largest team on record.

Which city has the most automotive quality assurance firms?

Los Angeles leads with 7 headquartered companies, followed by Houston (5) and Atlanta (4).

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 1,748 verified decision-maker contacts tracked across these 248 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 30, 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.