Company lists · Data refreshed September 2026

Top 14 Investigative site organizations based in Türkiye

RevenueBase identified 36 investigative site organizations headquartered in Türkiye as of September 2026 and tracks 1,151 professional contacts across them, including 309 with verified work emails. Ankara is the largest hub.

This list covers investigative site organizations 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 20, 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 20, 2026 86% judged on-target in blind review
36Companies
1,151Contacts tracked
309Verified emails
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The 14 largest investigative site organizations based in Türkiye

Ranked by team size
Top 14 of 36 investigative site organizations based in Türkiye, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to investigative site organizations: 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
1Partial evidenceIstanbul, TürkiyeHQ checked Sep 20, 202651-200308 contacts →

Partial evidence

“MEDEX is an organization that specializes in managing clinical research sites.”

Source: RevenueBase Database · checked Sep 20, 2026
2Indirect evidenceIstanbul, TürkiyeHQ checked Sep 20, 202651-200118 contacts →

Indirect evidence

“COMPANY Monitor CRO was founded in İstanbul as a pioneering Contract Research Organization in Turkey.”

Source: RevenueBase Database · checked Sep 20, 2026
3Indirect evidenceAnkara, TürkiyeHQ checked Sep 20, 202651-200104 contacts →

Indirect evidence

“To offer a reliable and responsible CRO alternative with its founders experience in the clinical research industry, CRM Medical drug research organization training consultancy.”

Source: RevenueBase Database · checked Sep 20, 2026
4Indirect evidenceIstanbul, TürkiyeHQ checked Sep 20, 202651-20076 contacts →

Indirect evidence

“Established in 2009, ETHIC Medical Research Ltd.”

Source: RevenueBase Database · checked Sep 20, 2026
5Indirect evidenceAnkara, TürkiyeHQ checked Sep 20, 202651-20067 contacts →

Indirect evidence

“Welcome to Mycro, your leading partner in contract research organization (CRO) services for clinical trials.”

Source: RevenueBase Database · checked Sep 20, 2026
6Indirect evidenceAnkara, TürkiyeHQ checked Sep 20, 202651-20065 contacts →

Indirect evidence

“OMEGA CRO is a Contract Research Organization (CRO) that provides high quality clinical, epidemiological and social research management, Medical Writing, Clinical and…”

Source: RevenueBase Database · checked Sep 20, 2026
7Indirect evidenceKarsiyaka, TürkiyeHQ checked Sep 20, 202611-5058 contacts →

Indirect evidence

“As an Habcare CRO, we are a leading company in the industry with our patient-centered approach and high-quality services in all stages of clinical research.”

Source: RevenueBase Database · checked Sep 20, 2026
8Indirect evidenceİstanbul, TürkiyeHQ checked Sep 20, 202651-20049 contacts →

Indirect evidence

“CO- Research is a full-service contract research organisation in Turkey.”

Source: RevenueBase Database · checked Sep 20, 2026
9Indirect evidenceAnkara, TürkiyeHQ checked Sep 20, 202611-5042 contacts →

Indirect evidence

“QUADRO CRO, is established on 2011 to provide support to the pharmaceutical and medical device industries on a contract basis and give services for clinical research, clinical…”

Source: RevenueBase Database · checked Sep 20, 2026
10Indirect evidenceBursa, TürkiyeHQ checked Sep 20, 2026n/a38 contacts →

Indirect evidence

“Clinical Research Organisation”

Source: RevenueBase Database · checked Sep 20, 2026
11Indirect evidenceIstanbul, TürkiyeHQ checked Sep 20, 20261-1012 contacts →

Indirect evidence

“OrjinCRS is an innovative, technology-led clinical research solutions company, which established in 2001 by a team of experts passionate about helping customers delivering highly…”

Source: RevenueBase Database · checked Sep 20, 2026
12Indirect evidenceAnkara, TürkiyeHQ checked Sep 20, 202611-505 contacts →

Indirect evidence

“Your Strategic Clinical Partner in Turkey | EUCROF Member CROTURK acts as your strategic operational extension in Turkey, bridging European sponsors to high-volume clinical…”

Source: RevenueBase Database · checked Sep 20, 2026
13Indirect evidenceSisli, TürkiyeHQ checked Sep 20, 202611-505 contacts →

Indirect evidence

“Vital CRO Klinik Araştırma Organizasyon Eğitim ve Danışmanlık Ltd.”

Source: RevenueBase Database · checked Sep 20, 2026
14Indirect evidenceAnkara, TürkiyeHQ checked Sep 20, 20261-103 contacts →

Indirect evidence

“We were established in 1998 as a ‘’ Contract Service Organization (CSO)’’ providing completely integrated services.”

Source: RevenueBase Database · checked Sep 20, 2026

Showing 14 of 36 investigative site organizations based in Türkiye

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Investigative site organizations based in Türkiye at a glance

As of Sep 20, 2026
26.8%Verified-email coverage
32.0Average contacts per company
11-50Median size (employees)
33.3%Largest-city concentration · Ankara
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
11
11-50
12
51-200
12
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 36 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 investigative site organizations, 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 “investigative site organizations”. 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 investigative site organizations), 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 investigative site organizations, 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, 309 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 20, 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 investigative site organizations, 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 investigative site organizations are there based in Türkiye?

RevenueBase identified 36 investigative site organizations 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?

Medex SMO, headquartered in Istanbul, tops this list with the largest team on record.

Which city has the most investigative site organizations?

Ankara leads with 12 headquartered companies, followed by Istanbul (10) and Cankaya (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 309 verified decision-maker contacts tracked across these 36 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 20, 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.