Company lists · Data refreshed September 2026

Top 25 Diagnostic testing services automotive based in the United States

Name: Diagnostic testing services automotive based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 1,101 companies tracked

RevenueBase identified 1,101 diagnostic testing services automotive headquartered in the United States as of September 2026 and tracks 6,592 professional contacts across them, including 1,371 with verified work emails. Houston is the largest hub.

This list covers diagnostic testing services automotive 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 16, 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 16, 2026 86% judged on-target in blind review

1,101Companies

6,592Contacts tracked

1,371Verified emails

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The 25 largest diagnostic testing services automotive based in the United States

Ranked by team size

Top 25 of 1,101 diagnostic testing services automotive based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to diagnostic testing services automotive: 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	Protech Automotive Solutions	Strong evidence	Lewisville, TX, United StatesHQ checked Sep 16, 2026	10001+	320 contacts →
	Strong evidence “At Protech Automotive Solutions®, we are dedicated to pioneering advanced diagnostic scanning, ADAS calibration, and mechanical expertise to ensure vehicle safety and reliability.” Source: RevenueBase Database · checked Sep 16, 2026
2	Noregon Systems	Indirect evidence	Greensboro, NC, United StatesHQ checked Sep 16, 2026	201-500	316 contacts →
	Indirect evidence “At Noregon, we are experts at acquiring, analyzing, and interpreting vehicle data.” Source: RevenueBase Database · checked Sep 16, 2026
3	Astech	Partial evidence	Plano, TX, United StatesHQ checked Sep 16, 2026	501-1,000	313 contacts →
	Partial evidence “Headquartered in Plano, Texas, asTech® focuses on providing OEM diagnostics to collision repair shops nationwide.” Source: RevenueBase Database · checked Sep 16, 2026
4	Diesel Laptops	Indirect evidence	Irmo, SC, United StatesHQ checked Sep 16, 2026	51-200	258 contacts →
	Indirect evidence “Diesel Laptops provides commercial truck efficiency solutions for truck repair facilities.” Source: RevenueBase Database · checked Sep 16, 2026
5	Kett Engineering Corporation	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	501-1,000	250 contacts →
	Strong 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 16, 2026
6	Opus IVS - US	Strong evidence	Dexter, MI, United StatesHQ checked Sep 16, 2026	501-1,000	169 contacts →
	Strong evidence “Opus IVS helps independent automotive shops repair the most complex vehicles fast with diagnostics, programming and live repair guidance from OE brand-specific master technicians.” Source: RevenueBase Database · checked Sep 16, 2026
7	Innova Electronics Corp	Strong evidence	Irvine, CA, United StatesHQ checked Sep 16, 2026	51-200	153 contacts →
	Strong evidence “THE AUTOMOTIVE AFTERMARKET INDUSTRY LEADER Innova Electronics Corporation is a leading supplier of test equipment and diagnostic reporting for the automotive aftermarket, offering…” Source: RevenueBase Database · checked Sep 16, 2026
8	Repairify, INC	Indirect evidence	Plano, TX, United StatesHQ checked Sep 16, 2026	501-1,000	132 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
9	Airpro Diagnostics	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 16, 2026	201-500	126 contacts →
	Indirect evidence “Complete end-to-end solutions for collision, glass, and repair shops.” Source: RevenueBase Database · checked Sep 16, 2026
10	Mobile Auto Solutions	Partial evidence	Broadview, IL, United StatesHQ checked Sep 16, 2026	201-500	122 contacts →
	Partial evidence “Mobile Auto Solutions provides unrivaled experience, capabilities, training, and equipment to the automotive industry.” Source: RevenueBase Database · checked Sep 16, 2026
11	HP Tuners	Indirect evidence	Buffalo Grove, IL, United StatesHQ checked Sep 16, 2026	51-200	120 contacts →
	Indirect evidence “HP Tuners, Connect, Read, Edit, Write, Drive… HP Tuners, the home of VCM Suite and the MPVI since 2003.” Source: RevenueBase Database · checked Sep 16, 2026
12	Lamb's Tire And Automotive	Partial evidence	Austin, TX, United StatesHQ checked Sep 16, 2026	51-200	73 contacts →
	Partial evidence “Lamb's Tire & Automotive is a GENUINE AUSTIN ORIGINAL founded in 1987 - Now with 16 Austin-area locations AUSTIN'S COMPLETE CAR CARE Headquarters Lamb’s Tire and Automotive…” Source: RevenueBase Database · checked Sep 16, 2026
13	TRP Laboratories	Partial evidence	Troy, MI, United StatesHQ checked Sep 16, 2026	51-200	70 contacts →
	Partial evidence “TRP Laboratories provides standard and custom testing services across the United States.” Source: RevenueBase Database · checked Sep 16, 2026
14	DG Technologies	Partial evidence	Farmington Hills, MI, United StatesHQ checked Sep 16, 2026	11-50	58 contacts →
	Partial evidence “DG Technologies (formerly Dearborn Group) is a value leader in vehicle network solutions for in-vehicle and controller area networks providing diagnostic, reprogramming…” Source: RevenueBase Database · checked Sep 16, 2026
15	Hickok Waekon, LLC	Indirect evidence	Cleveland, OH, United StatesHQ checked Sep 16, 2026	11-50	54 contacts →
	Indirect evidence “Hickok has been in the business of developing and manufacturing tools and equipment for over 100 years.” Source: RevenueBase Database · checked Sep 16, 2026
16	Launch Tech USA	Indirect evidence	Ontario, CA, United StatesHQ checked Sep 16, 2026	11-50	52 contacts →
	Indirect evidence “Launch Tech USA, headquarters for North American operations and located in Ontario, California.” Source: RevenueBase Database · checked Sep 16, 2026
17	Clifford Thames	Partial evidence	Fairlawn, OH, United StatesHQ checked Sep 16, 2026	501-1,000	41 contacts →
	Partial evidence “In July 2017, OEC acquired Clifford Thames (CT), further extending its global automotive industry reach.” Source: RevenueBase Database · checked Sep 16, 2026
18	Drive Automotive Services, LLC	Partial evidence	Kennesaw, GA, United StatesHQ checked Sep 16, 2026	201-500	39 contacts →
	Partial evidence “As a leading automotive repair service provider, Drive Automotive Services operates brands throughout the United States with locations in Phoenix, Denver, Atlanta, Houston, and…” Source: RevenueBase Database · checked Sep 16, 2026
19	Excel Engineering	Partial evidence	Diagonal, IA, United StatesHQ checked Sep 16, 2026	51-200	38 contacts →
	Partial evidence “Excel Engineering is a highly qualified and certified provider of testing services.” Source: RevenueBase Database · checked Sep 16, 2026
20	Lite-Check	Indirect evidence	Spokane, United StatesHQ checked Sep 16, 2026	11-50	36 contacts →
	Indirect evidence “Founded in 1986, LITE-CHECK was the first company to offer electronic testers for commercial trailers.” Source: RevenueBase Database · checked Sep 16, 2026
21	Joe's Garage	Indirect evidence	Eugene, OR, United StatesHQ checked Sep 16, 2026	11-50	35 contacts →
	Indirect evidence “Since 1952, Joe's Garage has provided motorists in the Eugene, OR area with comprehensive auto repair services that include Car Care Services, Car Detailing, General Services…” Source: RevenueBase Database · checked Sep 16, 2026
22	American Pride Automotive	Indirect evidence	Toano, VA, United StatesHQ checked Sep 16, 2026	11-50	31 contacts →
	Indirect evidence “A TRUE ALTERNATIVE TO THE DEALER Are you searching for a cost-effective alternative to your local dealership for quality auto repair services?” Source: RevenueBase Database · checked Sep 16, 2026
23	Pretect	Strong evidence	Brookhaven, NY, United StatesHQ checked Sep 16, 2026	n/a	31 contacts →
	Strong evidence “We use predictive diagnostics and other testing and troubleshooting methodologies to keep your mechanical equipment up and running optimally.” Source: RevenueBase Database · checked Sep 16, 2026
24	DSA Systems, INC	Indirect evidence	Troy, MI, United StatesHQ checked Sep 16, 2026	11-50	28 contacts →
	Indirect evidence “Engineering is our Passion We are an international team of more than 500 employees with our own subsidiaries in 8 countries.” Source: RevenueBase Database · checked Sep 16, 2026
25	Cojali USA INC	Indirect evidence	Doral, FL, United StatesHQ checked Sep 16, 2026	11-50	28 contacts →
	Indirect evidence “Research, Development, and Innovation are the basis to our foundation.” Source: RevenueBase Database · checked Sep 16, 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: diagnostic testing services automotive. 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 diagnostic testing services automotive.
Partial evidence: Its own public description names part of diagnostic testing services automotive, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name diagnostic testing services automotive. 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 1,101 diagnostic testing services automotive based in the United States

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Diagnostic testing services automotive based in the United States at a glance

As of Sep 16, 2026

20.8%Verified-email coverage

6.0Average contacts per company

1-10Median size (employees)

1.5%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

762

11-50

264

51-200

201-500

501-1,000

5,001-10,000

10001+

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 1,101 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 diagnostic testing services automotive, 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 “diagnostic testing services automotive”. 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 diagnostic testing services automotive), 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 diagnostic testing services automotive, 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, 1,371 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 16, 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 diagnostic testing services automotive, 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 diagnostic testing services automotive are there based in the United States?

RevenueBase identified 1,101 diagnostic testing services automotive 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?

Protech Automotive Solutions, headquartered in Lewisville, tops this list with the largest team on record.

Which city has the most diagnostic testing services automotive?

Houston leads with 16 headquartered companies, followed by Chicago (13) and Austin (12).

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 1,371 verified decision-maker contacts tracked across these 1,101 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 16, 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.