Company lists · Data refreshed September 2026

Top 23 Compliance and audit outsourcing companies based in Türkiye

RevenueBase identified 75 compliance and audit outsourcing companies headquartered in Türkiye as of September 2026 and tracks 479 professional contacts across them, including 87 with verified work emails. Istanbul is the largest hub.

This list covers compliance and audit outsourcing 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 27, 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 27, 2026 86% judged on-target in blind review
75Companies
479Contacts tracked
87Verified emails
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The 23 largest compliance and audit outsourcing companies based in Türkiye

Ranked by team size
Top 23 of 75 compliance and audit outsourcing companies based in Türkiye, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to compliance and audit outsourcing 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 27, 202611-5042 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 27, 2026
2Indirect evidenceBeykoz, TürkiyeHQ checked Sep 27, 202611-5038 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 27, 2026
3Indirect evidenceOsmangazi, TürkiyeHQ checked Sep 27, 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 27, 2026
4Indirect evidenceIstanbul, TürkiyeHQ checked Sep 27, 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 27, 2026
5Indirect evidenceİstanbul, TürkiyeHQ checked Sep 27, 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 27, 2026
6Partial evidenceBesiktas, TürkiyeHQ checked Sep 27, 202611-5010 contacts →

Partial evidence

“GRC LEGAL is a legal and compliance firm that lies at the intersection of IT and technology with law practice and offers a comprehensive portfolio of legal services to…”

Source: RevenueBase Database · checked Sep 27, 2026
7Indirect evidenceIstanbul, TürkiyeHQ checked Sep 27, 202611-507 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 27, 2026
8Indirect evidenceİstanbul, TürkiyeHQ checked Sep 27, 202651-2007 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 27, 2026
9Indirect evidenceIzmir Bayraklı, TürkiyeHQ checked Sep 27, 202611-507 contacts →

Indirect evidence

“Mali̇ye bakanliği spk kgk epdk tarim bakanliği tübi̇tak kosgeb deneti̇mleri̇ ve raporlamalari ifrs ve vuk deneti̇mleri̇ tasdi̇k raporlari bağimsiz deneti̇m raporlamalari”

Source: RevenueBase Database · checked Sep 27, 2026
10Indirect evidenceKadıköy, TürkiyeHQ checked Sep 27, 2026201-5007 contacts →

Indirect evidence

“Solvia Risk Solutions is a company established to help its business partners to detect their hidden deficiencies, address all weaknesses, and perfect their operations by…”

Source: RevenueBase Database · checked Sep 27, 2026
11Indirect evidenceIstanbul, TürkiyeHQ checked Sep 27, 20261-105 contacts →

Indirect evidence

“Our consultancy services enable you to effectively manage internal and external risks that may arise from your company, employees, and business partners.”

Source: RevenueBase Database · checked Sep 27, 2026
12Indirect evidenceIstanbul, TürkiyeHQ checked Sep 27, 20261-105 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 27, 2026
13Partial evidenceİstanbul, TürkiyeHQ checked Sep 27, 20261-104 contacts →

Partial evidence

“Consulting and outsourcing services for regulatory affairs dept.”

Source: RevenueBase Database · checked Sep 27, 2026
14Indirect evidenceIstanbul, TürkiyeHQ checked Sep 27, 20261-103 contacts →

Indirect evidence

“G&G is an organization located in Turkey and Hungary, who is aiming to support the organizations and individuals to conduct their businesses on efficient and secure platforms.”

Source: RevenueBase Database · checked Sep 27, 2026
15Indirect evidenceKartal, TürkiyeHQ checked Sep 27, 20261-103 contacts →

Indirect evidence

“Kurumsal organizasyonların bilgi güvenliği risklerini sistematik biçimde yönetmelerine destek oluyoruz.”

Source: RevenueBase Database · checked Sep 27, 2026
16Partial evidenceIstanbul, TürkiyeHQ checked Sep 27, 20261-103 contacts →

Partial evidence

“DENKLEM Sworn-in Certified Public Accounting and AUDIT was established by Serdar TAŞDÖKEN who has worked as a Finance Inspector for a long time in the Ministry of Finance and now…”

Source: RevenueBase Database · checked Sep 27, 2026
17Indirect evidenceİzmi̇r, TürkiyeHQ checked Sep 27, 20261-103 contacts →

Indirect evidence

“Managed internal controls related services (business process reviews, designs and re-engineering, controls review and implementation, risk assessments) for government institutions…”

Source: RevenueBase Database · checked Sep 27, 2026
18Indirect evidenceİzmir, TürkiyeHQ checked Sep 27, 20261-102 contacts →

Indirect evidence

“100 yerli sermaye ile kurulan şirketimiz 2017 yılından bugüne 5 yılda fazla denetim gerçekleştirmiştir.”

Source: RevenueBase Database · checked Sep 27, 2026
19Indirect evidenceBayraklı, TürkiyeHQ checked Sep 27, 20261-102 contacts →

Indirect evidence

“TnB Kurumsal Danışmanlık ve Denetim Ltd.”

Source: RevenueBase Database · checked Sep 27, 2026
20Partial evidenceIstanbul, TürkiyeHQ checked Sep 27, 202611-502 contacts →

Partial evidence

“Customs & Partners is an independent audit and consultancy firm specializing in customs and foreign trade, founded by partners each with at least +20 years of experience…”

Source: RevenueBase Database · checked Sep 27, 2026
21Indirect evidenceİstanbul, TürkiyeHQ checked Sep 27, 20261-102 contacts →

Indirect evidence

“Neta Denetim; İç Kontrol, Uyum ve Risk Yönetimi alanlarında müşterilerine bilgi ve birikimini aktaran bir danışmanlık firmasıdır.”

Source: RevenueBase Database · checked Sep 27, 2026
22Indirect evidenceSisli, TürkiyeHQ checked Sep 27, 20261-102 contacts →

Indirect evidence

“We would like to share that we have concluded our operations.”

Source: RevenueBase Database · checked Sep 27, 2026
23Partial evidenceBagcilar, TürkiyeHQ checked Sep 27, 202611-501 contacts →

Partial evidence

“Our company was established with the aim of reviewing and supervising the compliance of the goods, cash and document flows of foreign trade companies with the current foreign…”

Source: RevenueBase Database · checked Sep 27, 2026

Showing 23 of 75 compliance and audit outsourcing companies based in Türkiye

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Compliance and audit outsourcing companies based in Türkiye at a glance

As of Sep 27, 2026
18.2%Verified-email coverage
6.4Average contacts per company
1-10Median size (employees)
48.0%Largest-city concentration · Istanbul
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
43
11-50
24
51-200
6
201-500
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 75 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 compliance and audit outsourcing 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 “compliance and audit outsourcing 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 compliance and audit outsourcing 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 compliance and audit outsourcing 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, 87 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 27, 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 compliance and audit outsourcing 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 compliance and audit outsourcing companies are there based in Türkiye?

RevenueBase identified 75 compliance and audit outsourcing 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?

Lostar Bilgi Güvenliği, headquartered in Istanbul, tops this list with the largest team on record.

Which city has the most compliance and audit outsourcing companies?

Istanbul leads with 36 headquartered companies, followed by Izmir (5) and Ankara (4).

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 87 verified decision-maker contacts tracked across these 75 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 27, 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.