Company lists · Data refreshed September 2026

Top 25 Internal audit consulting companies based in Türkiye

RevenueBase identified 355 internal audit consulting companies headquartered in Türkiye as of September 2026 and tracks 2,863 professional contacts across them, including 409 with verified work emails. Istanbul is the largest hub.

This list covers internal 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 14, 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 14, 2026 86% judged on-target in blind review
355Companies
2,863Contacts tracked
409Verified emails
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The 25 largest internal audit consulting companies based in Türkiye

Ranked by team size
Top 25 of 355 internal audit consulting companies based in Türkiye, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to internal 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 evidenceİstanbul, TürkiyeHQ checked Sep 14, 2026201-500197 contacts →

Indirect evidence

“GÜRELİ YEMİNLİ MALİ MÜŞAVİRLİK VE BAĞIMSIZ DENETİM HİZMETLERİ A.Ş.”

Source: RevenueBase Database · checked Sep 14, 2026
2Indirect evidenceİstanbul, TürkiyeHQ checked Sep 14, 202651-20093 contacts →

Indirect evidence

“Vergi, Denetim, Danışmanlık”

Source: RevenueBase Database · checked Sep 14, 2026
3Indirect evidenceİstanbul, TürkiyeHQ checked Sep 14, 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 14, 2026
4Strong evidenceÇankaya, TürkiyeHQ checked Sep 14, 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 14, 2026
5Indirect evidenceKonak, TürkiyeHQ checked Sep 14, 202651-20054 contacts →

Indirect evidence

“Şirketimiz, 1992 yılında kurulmuştur.”

Source: RevenueBase Database · checked Sep 14, 2026
6Indirect evidenceAnkara, TürkiyeHQ checked Sep 14, 202651-20054 contacts →

Indirect evidence

“Vezin Yeminli Mali Müşavirlik A.Ş, uzun yıllar kamudan sonra özel sektörde Yeminli Mali Müşavirlik ve üst düzey yöneticilik yapmış Hesap Uzmanları tarafından kurulmuş olup, şirket…”

Source: RevenueBase Database · checked Sep 14, 2026
7Indirect evidenceBeykoz, TürkiyeHQ checked Sep 14, 202611-5038 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 14, 2026
8Indirect evidenceAnkara, TürkiyeHQ checked Sep 14, 202651-20037 contacts →

Indirect evidence

“Değer katan bir hizmet sunmak ve bir işi büyütmek sıradan bir iş anlayışı ile gerçekleştirilemez.”

Source: RevenueBase Database · checked Sep 14, 2026
9Partial evidenceİzmir, TürkiyeHQ checked Sep 14, 202611-5037 contacts →

Partial evidence

“Çözüm Ünlüer Bağımsız Denetim ve Yeminli Mali Müşavirlik A.Ş.| Nexia International Izmir Office | nexia.com • Bağımsız Denetim • Tam Tasdik Hizmeti • Katma Değer Vergisi İadesi •…”

Source: RevenueBase Database · checked Sep 14, 2026
10Indirect evidenceİçerenköy, TürkiyeHQ checked Sep 14, 202651-20032 contacts →

Indirect evidence

“İtimat Global kurumsal hizmet ağının nüvesini oluşturan İtimat Bağımsız Denetim A.Ş.”

Source: RevenueBase Database · checked Sep 14, 2026
11Indirect evidenceOsmangazi, TürkiyeHQ checked Sep 14, 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 14, 2026
12Strong evidence19 Mayis, TürkiyeHQ checked Sep 14, 202651-20028 contacts →

Strong evidence

“Kreston ATA International Audit Company has been operating in Turkey as a member of Kreston International.”

Source: RevenueBase Database · checked Sep 14, 2026
13Indirect evidenceİçerenköy, TürkiyeHQ checked Sep 14, 20261-1024 contacts →

Indirect evidence

“We are a medium-sized auditing and advisory firm.”

Source: RevenueBase Database · checked Sep 14, 2026
14Indirect evidenceİstanbul, TürkiyeHQ checked Sep 14, 202611-5022 contacts →

Indirect evidence

“ARSEN, denetim, muhasebe, vergi ve danışmanlık alanlarında hizmet veren bir kuruluştur.”

Source: RevenueBase Database · checked Sep 14, 2026
15Indirect evidenceIstanbul, TürkiyeHQ checked Sep 14, 20261-1019 contacts →

Indirect evidence

“Teolupus Denetim Güvence Hizmetleri ve Yönetim Danışmanlığı, iç denetim, kurumsal risk yönetimi ve iç kontrol, süreç iyileştirme, insan kaynakları hizmetleri, bayii (franchise)…”

Source: RevenueBase Database · checked Sep 14, 2026
16Indirect evidenceİstanbul, TürkiyeHQ checked Sep 14, 202611-5017 contacts →

Indirect evidence

“Türkiye'de 2003 yılında başlattığımız faaliyetlerimize, bugün İstanbul'da bulunan merkez ofisimizde, konusunda deneyimli ve uzmanlaşmış kadromuzla, sektör odaklı ve müşterilerine…”

Source: RevenueBase Database · checked Sep 14, 2026
17Indirect evidenceİstanbul, TürkiyeHQ checked Sep 14, 202611-5015 contacts →

Indirect evidence

“Optimum Denetim 2011 yılında kurulmuştur.”

Source: RevenueBase Database · checked Sep 14, 2026
18Strong evidenceAnkara, TürkiyeHQ checked Sep 14, 202651-20015 contacts →

Strong evidence

“Note Office International Independent Audit Consultancy and YMM Inc, established in 2014, is headquartered in Ankara and there are liaison offices in Istanbul, Izmir and Konya…”

Source: RevenueBase Database · checked Sep 14, 2026
19Indirect evidenceSisli, TürkiyeHQ checked Sep 14, 202651-20014 contacts →

Indirect evidence

“Consulta Grubu, hizmet alanlarına göre kurumsal yapılanmasını oluşturmuş beş şirketten oluşmaktadır.”

Source: RevenueBase Database · checked Sep 14, 2026
20Indirect evidenceİstanbul, TürkiyeHQ checked Sep 14, 202611-5014 contacts →

Indirect evidence

“DENETIM TURKEY, which has been established for the purposes of the development of the knowledge and application of modern business administration in the areas of Tax, Accounting…”

Source: RevenueBase Database · checked Sep 14, 2026
21Indirect evidenceİçerenköy, TürkiyeHQ checked Sep 14, 202611-5014 contacts →

Indirect evidence

“We are a medium-sized auditing, accounting and consultancy firm.”

Source: RevenueBase Database · checked Sep 14, 2026
22Strong evidenceAtasehir, TürkiyeHQ checked Sep 14, 202611-5014 contacts →

Strong evidence

“Andersen in Turkey: Trusted Tax, Audit & Advisory for Confident Growth Andersen in Turkey helps Turkish and international businesses navigate tax, audit, accounting, and advisory…”

Source: RevenueBase Database · checked Sep 14, 2026
23Indirect evidenceKonak, TürkiyeHQ checked Sep 14, 202611-5013 contacts →

Indirect evidence

“İZDENETİM deneyimli ve profesyonel bir ekip tarafından kurulmuş olup; • Yeminli mali müşavirlik, • Bağımsız denetim, • Denetim hizmetleri, • Yönetim danışmanlığı, • Mali…”

Source: RevenueBase Database · checked Sep 14, 2026
24Indirect evidenceAnkara, TürkiyeHQ checked Sep 14, 202611-5013 contacts →

Indirect evidence

“REHBER, Bağımsız Denetim, Finansal Danışmanlık, Yeminli Mali Müşavirlik, Ulusal ve Uluslararası Fon Denetimi, Vergi ve Hukuk Müşavirliği ve Bilgi Sistemleri Denetimi konularında…”

Source: RevenueBase Database · checked Sep 14, 2026
25Indirect evidenceBeşiktaş, TürkiyeHQ checked Sep 14, 202611-5012 contacts →

Indirect evidence

“Kaya & Bekler, üretim ve hizmet sektörleri başta olmak üzere, çeşitli kurumsal sektör işletmelerine bağımsız denetim, vergi danışmanlığı, tam tasdik, muhasebe ve hukuki…”

Source: RevenueBase Database · checked Sep 14, 2026

Showing 25 of 355 internal audit consulting companies based in Türkiye

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Internal audit consulting companies based in Türkiye at a glance

As of Sep 14, 2026
14.3%Verified-email coverage
8.1Average contacts per company
11-50Median size (employees)
31.3%Largest-city concentration · Istanbul
Sep 14, 2026Page data refreshed

Companies by employee count

1-10
174
11-50
151
51-200
25
201-500
4

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 355 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 internal 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 “internal 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 internal 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 internal 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, 409 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 14, 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.

Internal audit consulting companies by metro

  • Internal audit consulting companies in Istanbul111
  • Internal audit consulting companies in Ankara30

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 internal 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 internal audit consulting companies are there based in Türkiye?

RevenueBase identified 355 internal 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?

Güreli̇ YMM A.S, headquartered in Istanbul, tops this list with the largest team on record.

Which city has the most internal audit consulting companies?

Istanbul leads with 111 headquartered companies, followed by Ankara (30) and Cankaya (20).

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 409 verified decision-maker contacts tracked across these 355 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 14, 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.