Company lists · Data refreshed September 2026
Top 25 Quality audit services worldwide
RevenueBase identified 3,117 quality audit services worldwide as of September 2026 and tracks 54,705 professional contacts across them, including 13,137 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.
This list covers quality 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 29, 2026. Country and city lists for quality 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.
The 25 largest quality audit services worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 23,155 contacts → | ||||
Partial evidence “Intertek is a leading Total Quality Assurance provider to industries worldwide.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 3,802 contacts → | ||||
Partial evidence “The Bureau Veritas Consumer Products Services division is a world-leading concept-to-consumer quality assurance and compliance services provider to manufacturers, distributors and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 3,572 contacts → | ||||
Partial evidence “QUALITY ALONG THE SUPPLY CHAIN Founded in 1997, TRIGO Group is a multinational company providing quality solutions for the automotive, aerospace and other transport industries.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,915 contacts → | ||||
Partial evidence “consulting firm in quality and environmental management system, quality control,quality assurance and lean manufacturing and productivity improvement.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 711 contacts → | ||||
Partial evidence “Exact x Forestall is a leading global provider of quality control solutions.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 291 contacts → | ||||
Partial evidence “The Citation Group offer unrivalled compliance and quality services to over businesses across the UK, Australia, New Zealand, and Canada.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 283 contacts → | ||||
Indirect evidence “RICI Company Ltd.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 251 contacts → | ||||
Partial 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 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 241 contacts → | ||||
Indirect evidence “For more than a decade the Tentamus Group has been providing services to customers all over the world.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 228 contacts → | ||||
Partial evidence “Dexon is committed to the delivery of quality inspection services and continuous improvement for our customers satisfaction.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 211 contacts → | ||||
Partial evidence “Pro QC International provides tailored quality solutions with a human touch in 100 countries.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 199 contacts → | ||||
Partial evidence “Q2 Management™ is a ISO-certified quality assurance solutions provider to the manufacturing industry.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 196 contacts → | ||||
Partial evidence “Established in 1994, G&P is a world-leading provider of quality management services to the manufacturing industry, primarily in the automotive, aerospace and off-highway sectors.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 179 contacts → | ||||
Partial evidence “Quality & Compliance | Regulatory Strategy | Inspection Readiness & Remediation | Data Integrity.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 132 contacts → | ||||
Indirect evidence “We're there, so our customers don’t have to be.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 112 contacts → | ||||
Indirect evidence “The basis of our work is the set of values and standards of work we have developed for years.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 110 contacts → | ||||
Partial evidence “Worldwide Provider of Inspection, Auditing & Quality Services GQS provides proven, effective and efficient product conformity and assurance services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 109 contacts → | ||||
Partial evidence “We, the redi-Group, are a global provider of project- and quality management services in the automotive- and other quality-oriented industries.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 105 contacts → | ||||
Indirect evidence “Somos una empresa certificada ISO 9001, constituida por un equipo de profesionales de distintas disciplinas como ingeniería, estadística, recursos humanos, administración de…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 101 contacts → | ||||
Indirect evidence “Setec Consulting Group is one of the biggest consulting, training and auditing companies in Latin America.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 98 contacts → | ||||
Indirect evidence “Management Consulting • Business processes auditing and optimization • Consulting regarding resources management • Strategy & objective development • Outsourcing/Offshoring •…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 91 contacts → | ||||
Indirect evidence “Monitoring & Conformity Assessment Iran پایش و ارزیابی انطباق ایران Company Providing Conformity Assessment Industrial services Certification Services for a wide range of…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 85 contacts → | ||||
Indirect evidence “INTERCERT is a multinational auditing company headquartered in Texas, United States operating at 28+ countries.” Source: RevenueBase Database · checked Sep 29, 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: quality 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 quality audit services.
- Partial evidence
- Its own public description names part of quality audit services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name quality 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 3,117 quality audit services worldwide
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 13,137 reachable decision-makers.
Free signup · no credit card
Quality audit services worldwide at a glance
As of Sep 29, 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 quality 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 quality audit services are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “quality 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 quality 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 quality 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, 13,137 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 29, 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.
Quality audit services by location
14 lists · largest firstEvery Quality audit services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Quality audit services based in the United States339
- Quality audit services based in Brazil252
- Quality audit services based in India205
- Quality audit services based in France182
- Quality audit services based in Germany136
- Quality audit services based in the United Kingdom125
- Quality audit services based in Italy88
- Quality audit services based in Mexico87
- Quality audit services based in Spain79
- Quality audit services based in Türkiye78
- Quality audit services based in Australia75
- Quality audit services based in the Netherlands72
- Quality audit services based in Canada49
- Quality audit services based in Belgium26
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 quality 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 quality audit services are there worldwide?
RevenueBase identified 3,117 quality 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 quality audit services?
The United States leads with 339 companies, followed by Brazil (252) and India (205). Every quality audit services list by country and city is linked on this page.
Which city has the most quality audit services?
Sao Paulo leads with 45 headquartered companies, followed by Lima (28) and London (23).
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 13,137 verified decision-maker contacts tracked across these 3,117 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 29, 2026.
Ready to reach these companies? Verified emails and direct dials for all 3,117 quality audit services 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.