Company lists · Data refreshed September 2026

Top 25 IT audit consulting firms based in Türkiye

RevenueBase identified 200 company matches for IT audit consulting firms associated with Türkiye as of September 2026 and tracks 1,699 professional contacts across them, including 261 with verified work emails. Istanbul is the largest hub.

This list covers company matches for IT audit consulting firms associated with Türkiye, 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 September 21, 2026.

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 Sep 21, 2026 How this list was built
200Companies
1,699Contacts tracked
261Verified emails
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The 25 largest IT audit consulting firms based in Türkiye

Ranked by team size
Top 25 of 200 company matches for IT audit consulting firms based in Türkiye, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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 matchİstanbul, TürkiyeHQ recorded Sep 21, 202651-20093 contacts →

Exact match

“Vergi, Denetim, Danışmanlık”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchİstanbul, TürkiyeHQ recorded Sep 21, 202651-20081 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchÇankaya, TürkiyeHQ recorded Sep 21, 202651-20055 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchKonak, TürkiyeHQ recorded Sep 21, 202651-20054 contacts →

Exact match

“Şirketimiz, 1992 yılında kurulmuştur.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchİstanbul, TürkiyeHQ recorded Sep 21, 202611-5042 contacts →

Exact match

“Company Profile Lostar Inc, founded in 1998, based in Istanbul/Turkey, provides competitive edge in an uncertain world with Business and Technology Risk Consulting.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchBeykoz, TürkiyeHQ recorded Sep 21, 202611-5038 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchAnkara, TürkiyeHQ recorded Sep 21, 202651-20037 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchİçerenköy, TürkiyeHQ recorded Sep 21, 202651-20032 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchOsmangazi, TürkiyeHQ recorded Sep 21, 202651-20028 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchİçerenköy, TürkiyeHQ recorded Sep 21, 20261-1024 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchİstanbul, TürkiyeHQ recorded Sep 21, 202611-5022 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchİstanbul, TürkiyeHQ recorded Sep 21, 202611-5015 contacts →

Exact match

“Optimum Denetim 2011 yılında kurulmuştur.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchSisli, TürkiyeHQ recorded Sep 21, 202651-20014 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchİstanbul, TürkiyeHQ recorded Sep 21, 202611-5014 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchİçerenköy, TürkiyeHQ recorded Sep 21, 202611-5014 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchAnkara, TürkiyeHQ recorded Sep 21, 202611-5013 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchBeşiktaş, TürkiyeHQ recorded Sep 21, 202611-5012 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchSariyer, TürkiyeHQ recorded Sep 21, 202611-5010 contacts →

Exact match

“Akademik Bağımsız Denetim A.Ş.” 13 Aralık 1994 yılında Bağımsız Denetim, İç Denetim, Muhasebe, Finansal ve Mali Danışmanlık hizmetleri sunmak üzere Ankara’da kurulmuştur.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchİstanbul, TürkiyeHQ recorded Sep 21, 202611-5010 contacts →

Exact match

“Established in 1996, AG Audit has been authorized as an independent audit firm by the Public Oversight Accounting and Auditing Standards Authority.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchIstanbul, TürkiyeHQ recorded Sep 21, 202611-509 contacts →

Exact match

“Kapsam YMM,1995 yılından bu yana tecrübeli uzman kadrosuyla Mali Müşavirlik, İç Denetim, Vergi Denetim, Planlama, Danışmanlığı hizmetleri vermektedir.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchAnkara, TürkiyeHQ recorded Sep 21, 202651-2009 contacts →

Exact match

“Founded in 2004, Dmf System International Independent Auditing, Consulting & Certified Public Accounting Co.(“DMF”) is an independent auditing, consultancy and Certified Public…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchKonak, TürkiyeHQ recorded Sep 21, 202611-508 contacts →

Exact match

“Motto olarak, müşterilerimize mükemmellikle hizmet vermek için tutkulu bir şekilde çalışıyoruz.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchIstanbul, TürkiyeHQ recorded Sep 21, 202611-507 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchAnkara, TürkiyeHQ recorded Sep 21, 20261-107 contacts →

Exact match

“Tax / Accounting / Consultancy”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchİstanbul, TürkiyeHQ recorded Sep 21, 202651-2007 contacts →

Exact match

“İDM İç Denetim Merkezi is a financial services company based out of Fahrettin Kerim Gökay ad:228 / 19, İstanbul, Istanbul, Turkey.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 200 IT audit consulting firms based in Türkiye

See the full list, filter by size, metro and specialty, and access 261 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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IT audit consulting firms based in Türkiye at a glance

As of Sep 21, 2026
15.4%Verified-email coverage
8.5Average contacts per company
11-50Median size (employees)
32.5%Largest-city concentration · Istanbul
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
94
11-50
83
51-200
21
201-500
1

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 200 companies.

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.
What qualifies
Company records associated with Türkiye whose business descriptions match “IT audit consulting firms” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 261 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 September 21, 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.

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 “IT audit consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many IT audit consulting firms are there based in Türkiye?

RevenueBase identified 200 company matches for IT audit consulting firms associated with Türkiye as of September 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?

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

Which city has the most IT audit consulting firms?

Istanbul leads with 65 company records, followed by Ankara (17) and Atasehir (10).

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 261 professional contacts with verified work emails tracked across these 200 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 September 21, 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 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.