Company lists · Data refreshed September 2026

Top 25 Iso audit consulting companies based in Türkiye

RevenueBase identified 563 iso audit consulting companies headquartered in Türkiye as of September 2026 and tracks 4,451 professional contacts across them, including 777 with verified work emails. Istanbul is the largest hub.

This list covers iso audit consulting companies headquartered in Türkiye, 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.

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
563Companies
4,451Contacts tracked
777Verified emails
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The 25 largest iso audit consulting companies based in Türkiye

Ranked by team size
Top 25 of 563 iso audit consulting companies based in Türkiye, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to iso audit consulting companies: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceİzmir, TürkiyeHQ checked Sep 28, 2026201-500220 contacts →

Indirect evidence

“Stop letting compliance risks slow down your global trade.”

Source: RevenueBase Database · checked Sep 28, 2026
2Indirect evidenceTürkiyeHQ checked Sep 28, 20265,001-10,000214 contacts →

Indirect evidence

“Biz SGS’yiz - dünyanın lider gözetim, test ve belgelendirme kuruluşu.”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceAtaşehir, TürkiyeHQ checked Sep 28, 202651-200118 contacts →

Indirect evidence

“AND, 2004 yılında yurtiçi ve yurtdışında belgelendirme konusunda tecrübeli bir ekip ile yola çıkarak, Türkiye’deki firmalara daha etkin hizmet vermek amacı ile kurulmuştur.”

Source: RevenueBase Database · checked Sep 28, 2026
4Indirect evidenceİstnbul, TürkiyeHQ checked Sep 28, 2026201-50098 contacts →

Indirect evidence

“ALFANORM denetim ve belgelendirme sektöründe uzun yıllara dayalı tecrübesi bulunan uzmanlar tarafından kurulmuş bağımsız bir denetim ve belgelendirme firmasıdır.”

Source: RevenueBase Database · checked Sep 28, 2026
5Indirect evidenceİstanbul, TürkiyeHQ checked Sep 28, 202651-20093 contacts →

Indirect evidence

“TÜV NORD Turkey - Inspired by Knowledge TÜV NORD Turkey Teknik Kontrol ve Belgelendirme A.Ş.”

Source: RevenueBase Database · checked Sep 28, 2026
6Indirect evidenceAnkara, TürkiyeHQ checked Sep 28, 202651-20090 contacts →

Indirect evidence

“UDEM olarak, 20 yılı aşkın tecrübemiz ile kaliteli, tarafsız ve sektöre öncülük eden uygunluk değerlendirme ve test hizmetleri sunmaktayız.”

Source: RevenueBase Database · checked Sep 28, 2026
7Indirect evidenceIstanbul, TürkiyeHQ checked Sep 28, 2026201-50090 contacts →

Indirect evidence

“ABOUT US: Drawing upon over four decades of expertise, our objective is to elevate inspection and surveillance endeavors to an international standard, thereby enhancing our brand…”

Source: RevenueBase Database · checked Sep 28, 2026
8Indirect evidenceİstanbul, TürkiyeHQ checked Sep 28, 202651-20088 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
9Indirect evidenceİstanbul, TürkiyeHQ checked Sep 28, 202651-20081 contacts →

Indirect evidence

“AS/Nexia Turkey is a professional auditing and consultancy company serving the leading firms in Turkey by giving independent auditing, financial advisory,full…”

Source: RevenueBase Database · checked Sep 28, 2026
10Indirect evidenceIstanbul, TürkiyeHQ checked Sep 28, 202651-20079 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
11Indirect evidenceİstanbul, TürkiyeHQ checked Sep 28, 202651-20072 contacts →

Indirect evidence

“TSE Global (INTERNATIONAL CONFORMITY ASSESMENT SERVICE INC.), was founded by joint efforts of Turkish Standards Instutition (TSE) and Ministry of Science, Industry and Technology…”

Source: RevenueBase Database · checked Sep 28, 2026
12Indirect evidenceBeykoz, TürkiyeHQ checked Sep 28, 202651-20070 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
13Indirect evidenceYenimahalle / Ankara, TürkiyeHQ checked Sep 28, 202651-20057 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
14Strong evidenceÇankaya, TürkiyeHQ checked Sep 28, 202651-20055 contacts →

Strong evidence

“Since 1998, Güncel Group has delivered high-level independent audit, tax assurance, corporate valuation, and strategic consulting to publicly traded corporations, holdings…”

Source: RevenueBase Database · checked Sep 28, 2026
15Indirect evidenceKonak, TürkiyeHQ checked Sep 28, 202651-20054 contacts →

Indirect evidence

“Şirketimiz, 1992 yılında kurulmuştur.”

Source: RevenueBase Database · checked Sep 28, 2026
16Indirect evidenceŞişli, TürkiyeHQ checked Sep 28, 202651-20047 contacts →

Indirect evidence

“2008 yılında; bağımsız, tarafsız ve güvenilir bir hizmet anlayışıyla çıktığımız yolda gururla devam ediyoruz.”

Source: RevenueBase Database · checked Sep 28, 2026
17Indirect evidenceBeykoz, TürkiyeHQ checked Sep 28, 202611-5038 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
18Indirect evidenceKocaeli, TürkiyeHQ checked Sep 28, 202651-20037 contacts →

Indirect evidence

“Incolab is an international network of accredited inspection and testing companies, serving clients across the globe.”

Source: RevenueBase Database · checked Sep 28, 2026
19Indirect evidenceİzmir, TürkiyeHQ checked Sep 28, 202651-20035 contacts →

Indirect evidence

“ECOCERT, a global leader in certification in organic farming and organic cosmetics, relies on an international network of 30 branches operating in more than 130 countries.”

Source: RevenueBase Database · checked Sep 28, 2026
20Indirect evidenceİstanbul, TürkiyeHQ checked Sep 28, 202651-20030 contacts →

Indirect evidence

“AKIN Kalite Grup A.Ş, merkez ofisi Tuzla istanbul’da olan, ana çalışma alanı Petrol & Gaz, Enerji ve imalat sektörlerinde çalışan firmalara belgelendirme, tahribatlı ve…”

Source: RevenueBase Database · checked Sep 28, 2026
21Indirect evidenceİzmi̇r, TürkiyeHQ checked Sep 28, 202611-5030 contacts →

Indirect evidence

“IFC GLOBAL Sertifikasyon Muayene ve Eğitim Hizmetleri Anonim Şirketi uygunluk değerlendirme hizmetleri (Sistem belgelendirme, ürün belgelendirme ve muayene) konusunda hizmet…”

Source: RevenueBase Database · checked Sep 28, 2026
22Indirect evidenceOsmangazi, TürkiyeHQ checked Sep 28, 202651-20028 contacts →

Indirect evidence

“Bağımsız Denetim Nexia Bursa; Kadrosundaki tecrübeli denetçilerden oluşan denetim ekipleriyle, Sermaye Piyasası Mevzuatına tabi kurum ve kuruluşların, Enerji Piyasasında faaliyet…”

Source: RevenueBase Database · checked Sep 28, 2026
23Partial evidenceIstanbul, TürkiyeHQ checked Sep 28, 202651-20023 contacts →

Partial evidence

“Management Systems Certification; ISO 9001 Quality Management System, ISO 14001 Environmental Management System, ISO 45001 OHSAS, ISO Information Technologies Service Management…”

Source: RevenueBase Database · checked Sep 28, 2026
24Indirect evidenceİstanbul, TürkiyeHQ checked Sep 28, 202611-5022 contacts →

Indirect evidence

“CRAD 2008 yılında, kimya ve benzeri endüstri alanlarını Türkiye ve dünya çapında kimyasal mevzuatlara uyum konusunda desteklemek amacıyla kurulmuştur.”

Source: RevenueBase Database · checked Sep 28, 2026
25Partial evidenceAtasehir, TürkiyeHQ checked Sep 28, 202611-5022 contacts →

Partial evidence

“ISO/ IEC 17021, ISO/IEC 17020 ve ISO/IEC 17065 standartlarına uygunluk göstermek ve akreditasyon kapsamına uygun şekilde, ilgili yönetim sistemlerinden belgelendirilmek isteyen…”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 563 iso audit consulting companies based in Türkiye

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Iso audit consulting companies based in Türkiye at a glance

As of Sep 28, 2026
17.5%Verified-email coverage
7.9Average contacts per company
1-10Median size (employees)
29.7%Largest-city concentration · Istanbul
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
319
11-50
177
51-200
50
201-500
10
501-1,000
4
5,001-10,000
1
10001+
2

Email recency for this list is measured worldwide rather than for Türkiye, so it is reported there. Company counts and contact totals on this page are exact for Türkiye, over 563 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 iso audit consulting companies, 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 Türkiye whose own description of what they do matches “iso audit consulting companies”. 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 consulting companies), 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 consulting companies, and records with no verified work email. Companies headquartered outside Türkiye 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, 777 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.

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 consulting companies, 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 consulting companies are there based in Türkiye?

RevenueBase identified 563 iso audit consulting companies headquartered in Türkiye 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?

USB Certification, headquartered in Izmir, tops this list with the largest team on record.

Which city has the most iso audit consulting companies?

Istanbul leads with 167 headquartered companies, followed by Ankara (58) and Izmir (32).

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 777 verified decision-maker contacts tracked across these 563 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.