Company lists · Data refreshed September 2026

Top 25 Iso audit services worldwide

Name: Iso audit services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 7,129 companies tracked

RevenueBase identified 7,129 iso audit services worldwide as of September 2026 and tracks 137,828 professional contacts across them, including 31,517 with verified work emails. India is the largest market and Lima the largest hub.

This list covers iso audit services 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 28, 2026. Country and city lists for iso audit services 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

7,129Companies

137,828Contacts tracked

31,517Verified emails

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The 25 largest iso audit services worldwide

Ranked by team size

Top 25 of 7,129 iso audit services worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to iso audit services: 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	Intertek	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	10001+	23,155 contacts →
	Indirect evidence “Intertek is a leading Total Quality Assurance provider to industries worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
2	DNV	Indirect evidence	Høvik, NorwayHQ checked Sep 28, 2026	10001+	15,983 contacts →
	Indirect evidence “DNV is the independent expert in risk management and assurance, operating in more than 100 countries.” Source: RevenueBase Database · checked Sep 28, 2026
3	TÜV SÜD	Indirect evidence	Munich, GermanyHQ checked Sep 28, 2026	10001+	13,350 contacts →
	Indirect evidence “TÜV SÜD is the trusted partner of choice for safety, security and sustainability solutions.” Source: RevenueBase Database · checked Sep 28, 2026
4	TÜV Rheinland Group	Indirect evidence	Cologne, GermanyHQ checked Sep 28, 2026	10001+	7,928 contacts →
	Indirect evidence “Neutral, independent third party For more than 150 years, TÜV Rheinland has stood for ensuring quality, safety, and efficiency in conjunction with people, the environment, and…” Source: RevenueBase Database · checked Sep 28, 2026
5	PT Surveyor Indonesia	Indirect evidence	Jakarta Selatan, IndonesiaHQ checked Sep 28, 2026	5,001-10,000	2,309 contacts →
	Indirect evidence “Surveyor Indonesia didirikan pada tanggal 1 Agustus 1991.” Source: RevenueBase Database · checked Sep 28, 2026
6	MCA Auditoria E Gerenciamento Ltda	Partial evidence	Belo Horizonte, BrazilHQ checked Sep 28, 2026	1,001-5,000	1,754 contacts →
	Partial evidence “MCA Audit and Management Ltd, which specializes in consulting, auditing and project management and construction, is a company created by professionals graduating from leading…” Source: RevenueBase Database · checked Sep 28, 2026
7	Applus Europe	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	1,001-5,000	1,670 contacts →
	Indirect evidence “Applus+ is a worldwide leader in the testing, inspection, and certification sector.” Source: RevenueBase Database · checked Sep 28, 2026
8	DQS	Indirect evidence	Frankfurt Am Main, GermanyHQ checked Sep 28, 2026	1,001-5,000	1,424 contacts →
	Indirect evidence “DQS – Leveraging Quality, Driving Success.” Source: RevenueBase Database · checked Sep 28, 2026
9	Vinçotte	Indirect evidence	Vilvoorde, BelgiumHQ checked Sep 28, 2026	1,001-5,000	1,246 contacts →
	Indirect evidence “Vinçotte (a Kiwa company since May 2022) offers objective and advisory services in inspection, certification, conformity assessment and training.” Source: RevenueBase Database · checked Sep 28, 2026
10	AENOR	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	501-1,000	961 contacts →
	Indirect evidence “AENOR is a global company, that identifies and helps organizations to overcome relevant competitiveness gaps.” Source: RevenueBase Database · checked Sep 28, 2026
11	British Engineering Services Group	Indirect evidence	Warrington, United KingdomHQ checked Sep 28, 2026	1,001-5,000	776 contacts →
	Indirect evidence “Testing, inspection, certification and compliance is our core business so that’s what gets 100% of our focus.” Source: RevenueBase Database · checked Sep 28, 2026
12	Intedya International Dynamic Advisors	Indirect evidence	Cayes, HaitiHQ checked Sep 28, 2026	201-500	559 contacts →
	Indirect evidence “Intedya is an Global Company specialized in Consulting, Training, Auditing based on International and Local Standards and best practices to manage Quality, Environment, Food…” Source: RevenueBase Database · checked Sep 28, 2026
13	Boslan Ingeniería Y Consultoría	Indirect evidence	Bilbao, SpainHQ checked Sep 28, 2026	501-1,000	526 contacts →
	Indirect evidence “Boslan, now part of Accenture, is a consolidated and solvent company supported by its numerous references developed for an important portfolio of clients.” Source: RevenueBase Database · checked Sep 28, 2026
14	Kiwa Nederland	Indirect evidence	Rijswijk, NetherlandsHQ checked Sep 28, 2026	501-1,000	443 contacts →
	Indirect evidence “Kiwa behoort tot de wereldwijde top-20 op het gebied van testen, inspectie en certificering (TIC).” Source: RevenueBase Database · checked Sep 28, 2026
15	IMQ S.P.A	Indirect evidence	Milano, ItalyHQ checked Sep 28, 2026	1,001-5,000	412 contacts →
	Indirect evidence “Il Gruppo IMQ rappresenta una delle più importanti realtà italiane nel settore della valutazione della conformità (certificazione, prove, verifiche, ispezioni), presente anche nei…” Source: RevenueBase Database · checked Sep 28, 2026
16	Pt. TÜV Nord Indonesia	Indirect evidence	Jakarta Selatan, IndonesiaHQ checked Sep 28, 2026	201-500	403 contacts →
	Indirect evidence “TÜV NORD Indonesia, member of TÜV NORD GROUP Germany, is one of certification, inspection and testing service providers.” Source: RevenueBase Database · checked Sep 28, 2026
17	Wimpey Laboratories	Partial evidence	Al Qouz First, United Arab EmiratesHQ checked Sep 28, 2026	201-500	341 contacts →
	Partial evidence “Wimpey Laboratories is an ISO accredited Independent laboratory.” Source: RevenueBase Database · checked Sep 28, 2026
18	TÜV Nord Nederland	Indirect evidence	Son, NetherlandsHQ checked Sep 28, 2026	201-500	299 contacts →
	Indirect evidence “TÜV NORD Nederland is part of the international TÜV NORD Group and has been contributing to the daily success of many companies in the Netherlands and abroad through the provision…” Source: RevenueBase Database · checked Sep 28, 2026
19	EQA España	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	201-500	298 contacts →
	Indirect evidence “EQA es una entidad internacional de certificación, verificación e inspección, con más de 25 años de trayectoria.” Source: RevenueBase Database · checked Sep 28, 2026
20	Rici Company	Indirect evidence	Dammam, Saudi ArabiaHQ checked Sep 28, 2026	501-1,000	283 contacts →
	Indirect evidence “RICI Company Ltd.” Source: RevenueBase Database · checked Sep 28, 2026
21	NQA	Indirect evidence	Dunstable, United KingdomHQ checked Sep 28, 2026	501-1,000	267 contacts →
	Indirect evidence “NQA is a leading global certification body, respected for providing flexible and supportive certification and training services that are technically advanced and meet the needs of…” Source: RevenueBase Database · checked Sep 28, 2026
22	TÜV Nord Cert	Indirect evidence	Essen, GermanyHQ checked Sep 28, 2026	10001+	252 contacts →
	Indirect evidence “TÜV NORD and its testing, inspection, and certification companies make our world safer and are a driving force for global innovation.” Source: RevenueBase Database · checked Sep 28, 2026
23	SQS	Indirect evidence	Zollikofen, SwitzerlandHQ checked Sep 28, 2026	51-200	251 contacts →
	Indirect evidence “The Swiss Association for Quality and Management Systems (SQS) is Switzerland's leading organisation for certification and assessment services.” Source: RevenueBase Database · checked Sep 28, 2026
24	Dexon Technology	Indirect evidence	Ban Chang, ThailandHQ checked Sep 28, 2026	201-500	228 contacts →
	Indirect evidence “Dexon is committed to the delivery of quality inspection services and continuous improvement for our customers satisfaction.” Source: RevenueBase Database · checked Sep 28, 2026
25	V. Sankar Aiyar & CO	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	51-200	222 contacts →
	Indirect evidence “V.” Source: RevenueBase Database · checked Sep 28, 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: iso audit services. 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 iso audit services.
Partial evidence: Its own public description names part of iso audit services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name iso audit services. 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 7,129 iso audit services worldwide

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Iso audit services worldwide at a glance

As of Sep 28, 2026

22.9%Verified-email coverage

19.3Average contacts per company

1-10Median size (employees)

1.3%Largest-city concentration · Lima

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

4,558

11-50

1,843

51-200

458

201-500

142

501-1,000

1,001-5,000

5,001-10,000

10001+

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 iso audit services, 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 iso audit services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “iso audit services”. 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 iso audit services), 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 iso audit services, 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, 31,517 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 28, 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.

Iso audit services by location

37 lists · largest first

Every Iso audit services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 iso audit services, 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 iso audit services are there worldwide?

RevenueBase identified 7,129 iso audit services 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?

Intertek, headquartered in London, tops this list with the largest team on record.

Which country has the most iso audit services?

India leads with 597 companies, followed by Brazil (442) and the United Kingdom (415). Every iso audit services list by country and city is linked on this page.

Which city has the most iso audit services?

Lima leads with 94 headquartered companies, followed by Sao Paulo (83) and London (72).

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 31,517 verified decision-maker contacts tracked across these 7,129 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 28, 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.