Company lists · Data refreshed November 2026

Top 25 Iso 27001 certification auditors worldwide

RevenueBase identified 1,503 company matches for iso 27001 certification auditors worldwide as of November 2026 and tracks 12,968 professional contacts across them, including 3,005 with verified work emails. India is the largest market and London the largest hub.

This list covers company matches for iso 27001 certification auditors worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for iso 27001 certification auditors follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
1,503Companies
12,968Contacts tracked
3,005Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest iso 27001 certification auditors worldwide

Ranked by team size
Top 25 of 1,503 company matches for iso 27001 certification auditors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchFrankfurt, GermanyHQ recorded Nov 6, 20261,001-5,0001,466 contacts →

Exact match

“DQS – Leveraging Quality, Driving Success.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchTampa, FL, United StatesHQ recorded Nov 6, 2026501-1,000896 contacts →

Exact match

“A-LIGN is the leading provider of high-quality, efficient cybersecurity compliance programs.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchMontreal, QC, CanadaHQ recorded Nov 6, 202651-200406 contacts →

Exact match

“PECB is a global leader in certification, committed to fostering digital trust through education, certification, and certificate programs across various disciplines.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchBangalore, IndiaHQ recorded Nov 6, 2026n/a215 contacts →

Exact match

“Dear Sir/Madam, This is Mahendra, I would first like to take this opportunity to introduce my company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchTampa, United StatesHQ recorded Nov 6, 2026201-500201 contacts →

Exact match

“Insight Assurance is a security and compliance firm trusted by more than 1,500 organizations for their SOC 1, SOC 2, SOC 3, PCI DSS, ISO 27001, ISO 27017/27018, ISO 27701, ISO…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchNavi Mumbai, IndiaHQ recorded Nov 6, 202651-200190 contacts →

Exact match

“QRC Assurance and Solutions has been a forerunner on the cybersecurity front, empanelled with CERT-in, certified to provide PCI DSS QSA, PA QSA, PCI 3DS, PCI SSF, ISO 27001, ISO…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchGuadalajara, MexicoHQ recorded Nov 6, 202651-200190 contacts →

Exact match

“Somos una firma con reconocimiento internacional que ofrece servicios de certificación, capacitación y evaluación de la conformidad en diferentes estándares nacionales e…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchWest Malling, United KingdomHQ recorded Nov 6, 2026201-500158 contacts →

Exact match

“Amtivo Group provides expert certification services for ISO standards, as well as training and related services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchNorwich, United KingdomHQ recorded Nov 6, 202651-200120 contacts →

Exact match

“We believe in keeping ISO certification simple, so that's exactly what we do.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchBogotá, ColombiaHQ recorded Nov 6, 202651-200119 contacts →

Exact match

“B-SECURE provides information security services and technologies that enable organizations to improve their security posture, minimize risk levels and simplify compliance of laws…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchUpper Colwall, United KingdomHQ recorded Nov 6, 202651-200114 contacts →

Exact match

“IASME is a cyber security certification company based in the Malvern Hills, with an office in Belfast and one in Dalgety Bay, near Edinburgh.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchThe Woodlands, TX, United StatesHQ recorded Nov 6, 202651-200102 contacts →

Exact match

“INTERCERT is a multinational auditing company headquartered in Texas, United States operating at 28+ countries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchPaderborn, GermanyHQ recorded Nov 6, 202651-20091 contacts →

Exact match

“neam IT-Services GmbH – founded in 1996 – is a Systems Integrator based in Paderborn, Germany and operating in various projects all over Europe.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5086 contacts →

Exact match

“Your partners in quality.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchSan Felipe I, MexicoHQ recorded Nov 6, 202651-20084 contacts →

Exact match

“Compecer es un Organismo de Certificación 100% Mexicano con una sólida trayectoria de más de 16 años.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchMumbai, IndiaHQ recorded Nov 6, 202651-20080 contacts →

Exact match

“ShieldByte Infosec is now CERT-In Empanelled Auditor and leading cyber security company in India.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchBella Vista, United KingdomHQ recorded Nov 6, 2026201-50066 contacts →

Exact match

“At RA, our PASSION is navigating digital complexities, securing assets, and ensuring compliance.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchLaval (montreal), QC, CanadaHQ recorded Nov 6, 202651-20064 contacts →

Exact match

“MSECB is specialized in the certification of management systems on a wide range of international standards.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchLewisburg, PA, United StatesHQ recorded Nov 6, 202611-5063 contacts →

Exact match

“Core Business Solutions specializes in the needs of small businesses seeking ISO 9001 certification.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchParis, FranceHQ recorded Nov 6, 202651-20060 contacts →

Exact match

“Certi-Trust™, a Certigroup company, is an international certification body auditing companies, professionals and technology products across a wide range of digital regulations and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchGurgaon, IndiaHQ recorded Nov 6, 202651-20060 contacts →

Exact match

“SIS Certifications Pvt.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact match台北市, TaiwanHQ recorded Nov 6, 202651-20058 contacts →

Exact match

“SGSISO/IEC 27001:2022ISO/IEC 27701:2019APPIoTTAF20SOC(113114)A ISOSOC ‣ ‣ ISSDU Security Advisory – CVE Research and Vulnerability”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchGuayaquil, EcuadorHQ recorded Nov 6, 202651-20056 contacts →

Exact match

“Auditoría y Consultoría | Ecuador Hansen-Holm está comprometida con la calidad y seguridad de la información que manejamos durante todo el proceso del servicio de auditoría…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchBogotá D.c, ColombiaHQ recorded Nov 6, 202651-20054 contacts →

Exact match

“Password Consulting Services | Ciberseguridad y Seguridad de la Información Password Consulting Services es una empresa especializada en ciberseguridad, seguridad de la…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact match's-hertogenbosch, NetherlandsHQ recorded Nov 6, 202611-5050 contacts →

Exact match

“Brand Compliance makes the reliability of organizations visible to the outside world.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 1,503 iso 27001 certification auditors worldwide

See the full list, filter by size, metro and specialty, and access 3,005 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Iso 27001 certification auditors worldwide at a glance

As of Nov 6, 2026
23.2%Verified-email coverage
8.6Average contacts per company
1-10Median size (employees)
2.5%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
925
11-50
424
51-200
109
201-500
27
501-1,000
8
1,001-5,000
3
5,001-10,000
1
10001+
2

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage
Every country. Country and city lists for iso 27001 certification auditors are linked below.
What qualifies
Company records worldwide whose business descriptions match “iso 27001 certification auditors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 3,005 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Iso 27001 certification auditors by location

13 lists · largest first

Every Iso 27001 certification auditors 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 SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “iso 27001 certification auditors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many iso 27001 certification auditors are there worldwide?

RevenueBase identified 1,503 company matches for iso 27001 certification auditors worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

DQS tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most iso 27001 certification auditors?

India leads with 170 companies, followed by the United Kingdom (139) and Germany (88). Every iso 27001 certification auditors list by country and city is linked on this page.

Which city has the most iso 27001 certification auditors?

London leads with 37 company records, followed by New Delhi (18) and Istanbul (15).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 3,005 professional contacts with verified work emails tracked across these 1,503 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,503 iso 27001 certification auditors worldwide. Start with a free account, no credit card.

Download this list →

Related lists

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 SmartSearch, 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.