Company lists · Data refreshed September 2026
Top 25 Electrical testing and diagnostics worldwide
RevenueBase identified 6,504 electrical testing and diagnostics worldwide as of September 2026 and tracks 37,355 professional contacts across them, including 9,029 with verified work emails. The United States is the largest market and London the largest hub.
This list covers electrical testing and diagnostics worldwide, 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 19, 2026. Country and city lists for electrical testing and diagnostics follow the table.
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.
The 25 largest electrical testing and diagnostics worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,275 contacts → | ||||
Strong evidence “Kinectrics is an integrated lifecycle management services company providing testing, inspection, certification and engineering consulting for the electric power generation…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,221 contacts → | ||||
Strong evidence “Shermco Industries is a provider of safe, reliable testing, repair, professional training, electrical outage planning, maintenance and analysis of rotating apparatus and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 844 contacts → | ||||
Partial evidence “OMICRON is an international company that works passionately on ideas for making electric power systems safe and reliable.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 653 contacts → | ||||
Strong evidence “Electric Power Systems is an independent electrical testing & engineering organization.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 619 contacts → | ||||
Strong evidence “Doble is the world’s most trusted brand in electrical diagnostics.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 327 contacts → | ||||
Indirect evidence “Delivering confidence for over 40 years.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 308 contacts → | ||||
Partial evidence “Residential and Commercial Services Since 1994, the professional electricians at Mr.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 228 contacts → | ||||
Partial evidence “In business since 1971, Electrical Reliability Services, Inc.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 196 contacts → | ||||
Partial evidence “Hilscher-Clarke Electric Company is a full service electrical contractor, with more than 100 years experience in the commercial, industrial, and residential markets.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 195 contacts → | ||||
Partial evidence “SDMyers is the industry leader in transformer and substation maintenance and electric power system reliability.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 167 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 158 contacts → | ||||
Partial evidence “Today's electrical infrastructure requires a level of quality control that only the best trained and most knowledgeable electrical contractors can master.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 152 contacts → | ||||
Partial evidence “KenMor Electric is recognized for its service and craftsmanship.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 148 contacts → | ||||
Indirect evidence “HIGHVOLT Prüftechnik Dresden GmbH is a global leader in high voltage and high current test systems and measurement equipment with experience of 120 years.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 138 contacts → | ||||
Partial evidence “Hood Patterson & Dewar (HP & D) is a customer-driven, employee-owned collaborative team of engineers, technicians, and service professionals, offering: • Electrical and mechanical…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 137 contacts → | ||||
Partial evidence “Founded in 2010, Guardian Electrical Compliance Ltd have become the market leaders in terms of Duty Holder guidance, technical & legislative support, site delivery and after sales…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 132 contacts → | ||||
Partial evidence “White Electrical is a full service industrial electrical contractor supplying many different industries including: automotive, food/beverage, power, chemical, pulp/paper…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 121 contacts → | ||||
Indirect evidence “LA EMPRESA Y SUS VALORES Osmos tiene por misión la prestación de servicios eléctricos, abarcando la instalación desde su concepción, realizando el montaje y manteniendo las…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 106 contacts → | ||||
Partial evidence “Unparalleled Service & Masterful Craftmanship (USMC) A Leader in Customer Service and Satisfaction Since Are you in need of expert Residential or Commercial Electrical services?” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 105 contacts → | ||||
Partial evidence “About Lemberg: Lemberg is a full-service electrical contracting firm for industrial, commercial and residential customers.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 102 contacts → | ||||
Partial evidence “BAUR is the world market leader of testing and measurement technology.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 102 contacts → | ||||
Partial evidence “DIT-MCO International's proven automated product testing solutions for wired assemblies provide reliable service to industrial, commercial, and military customers.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 98 contacts → | ||||
Partial evidence “Master Electric is a full service electrical contractor servicing the upper mid-west since 1973, providing commercial/industrial, multi-family, communication/data/fire/safety with…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 98 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 98 contacts → | ||||
Partial evidence “Welcome to United Electric Founded in 1976, United Electric has emerged as one of the leading electrical services companies in Sarasota and Manatee counties.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
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: electrical testing and diagnostics. 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 electrical testing and diagnostics.
- Partial evidence
- Its own public description names part of electrical testing and diagnostics, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name electrical testing and diagnostics. 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 6,504 electrical testing and diagnostics worldwide
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 9,029 reachable decision-makers.
Free signup · no credit card
Electrical testing and diagnostics worldwide at a glance
As of Sep 19, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 electrical testing and diagnostics, 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.
- Coverage
- Every country. Country and city lists for electrical testing and diagnostics are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “electrical testing and diagnostics”. 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 electrical testing and diagnostics), 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 electrical testing and diagnostics, and records with no verified work email.
- 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, 9,029 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 19, 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.
Electrical testing and diagnostics by location
15 lists · largest firstEvery Electrical testing and diagnostics list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Electrical testing and diagnostics based in the United States2,007
- Electrical testing and diagnostics based in the United Kingdom1,108
- Electrical testing and diagnostics based in Australia313
- Electrical testing and diagnostics based in Canada311
- Electrical testing and diagnostics based in Brazil275
- Electrical testing and diagnostics based in France195
- Electrical testing and diagnostics based in India166
- Electrical testing and diagnostics based in Germany158
- Electrical testing and diagnostics based in Italy111
- Electrical testing and diagnostics based in Switzerland94
- Electrical testing and diagnostics based in the Netherlands83
- Electrical testing and diagnostics based in Norway69
- Electrical testing and diagnostics based in New Zealand66
- Electrical testing and diagnostics based in Sweden36
- Electrical testing and diagnostics based in Belgium34
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 electrical testing and diagnostics, 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 electrical testing and diagnostics are there worldwide?
RevenueBase identified 6,504 electrical testing and diagnostics worldwide 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?
Kinectrics, headquartered in Toronto, tops this list with the largest team on record.
Which country has the most electrical testing and diagnostics?
The United States leads with 2,007 companies, followed by the United Kingdom (1,108) and Australia (313). Every electrical testing and diagnostics list by country and city is linked on this page.
Which city has the most electrical testing and diagnostics?
London leads with 77 headquartered companies, followed by Houston (35) and Sao Paulo (30).
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 9,029 verified decision-maker contacts tracked across these 6,504 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 19, 2026.
Ready to reach these companies? Verified emails and direct dials for all 6,504 electrical testing and diagnostics worldwide. Start with a free account, no credit card.
Download this list →Related lists
Browse the directory
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.