Company lists · Data refreshed September 2026

Top 18 App security consulting firms based in Türkiye

RevenueBase identified 66 app security consulting firms headquartered in Türkiye as of September 2026 and tracks 390 professional contacts across them, including 83 with verified work emails. Istanbul is the largest hub.

This list covers app security consulting firms 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
66Companies
390Contacts tracked
83Verified emails
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The 18 largest app security consulting firms based in Türkiye

Ranked by team size
Top 18 of 66 app security consulting firms 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 app security consulting firms: 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 evidenceIstanbul, TürkiyeHQ checked Sep 27, 202611-5069 contacts →

Indirect evidence

“2017 yılında bilgi güvenliği konusunda danışmanlık, servis ve destek hizmetleri vermek amacıyla kurulan Infinitum IT, siber olaylara müdahale hizmetleri, güvenli kod…”

Source: RevenueBase Database · checked Sep 27, 2026
2Partial evidenceİstanbul, TürkiyeHQ checked Sep 27, 202611-5042 contacts →

Partial 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
3Indirect evidenceİstanbul, TürkiyeHQ checked Sep 27, 202611-5017 contacts →

Indirect evidence

“2012 yılında kurulan Datakey, uzman kadrosu ve müşteri memnuniyetini ön planda tutan kaliteli hizmet anlayışı ile daima daha iyisini başarmıştır.”

Source: RevenueBase Database · checked Sep 27, 2026
4Indirect evidenceAnkara, TürkiyeHQ checked Sep 27, 202611-5017 contacts →

Indirect evidence

“PROYA was founded in 2002 in Ankara, Turkey, with a subsidiary in Istanbul.”

Source: RevenueBase Database · checked Sep 27, 2026
5Strong evidencePoligon Caddesi Buyaka 3. Blok Ümraniye, TürkiyeHQ checked Sep 27, 202611-5016 contacts →

Strong evidence

“GTI is an Information Security Consulting, Solutions & Training services firm, providing specialized security services.”

Source: RevenueBase Database · checked Sep 27, 2026
6Partial evidenceIstanbul, TürkiyeHQ checked Sep 27, 202611-5012 contacts →

Partial evidence

“Internal & External Penetration Tests Web & Mobil Application Security Tests CyberSecurity Consultancy Incident Response, Vulnerability Analysis, Threat Hunting”

Source: RevenueBase Database · checked Sep 27, 2026
7Indirect evidenceŞişli, TürkiyeHQ checked Sep 27, 20261-1010 contacts →

Indirect evidence

“Digital Forensics and Incident Response”

Source: RevenueBase Database · checked Sep 27, 2026
8Indirect evidenceAnkara, TürkiyeHQ checked Sep 27, 20261-1010 contacts →

Indirect evidence

“Sibereum Bilgi Güvenliği ve Danışmanlığı Tic.”

Source: RevenueBase Database · checked Sep 27, 2026
9Partial evidenceIstanbul, TürkiyeHQ checked Sep 27, 20261-1010 contacts →

Partial evidence

“Our Security Consultancy services depends on an methodological approach proven by numerous examples of success in the world and in our country.”

Source: RevenueBase Database · checked Sep 27, 2026
10Indirect evidenceİstanbul (istanbul, TürkiyeHQ checked Sep 27, 202611-507 contacts →

Indirect evidence

“Siber güvenlik alanında Denetim, Danışmanlık ve Uygulama, Eğitim, Adli Bilişim konularında hizmet vermektedir.”

Source: RevenueBase Database · checked Sep 27, 2026
11Partial evidenceAtasehir, TürkiyeHQ checked Sep 27, 202611-505 contacts →

Partial evidence

“Endpoint-labs is an award-winning pioneer in the next generation of application security solutions, rapidly becoming a widely recognized conspicuous in application security…”

Source: RevenueBase Database · checked Sep 27, 2026
12Indirect evidenceİstanbul, TürkiyeHQ checked Sep 27, 202611-504 contacts →

Indirect evidence

“Uygulama Geliştirme / Danışmanlık Biz, onlarca yıldır Türkiye'nin üst düzey firmalarında yazılım yapmış ve yazılım yönetmiş birkaç arkadaşız.”

Source: RevenueBase Database · checked Sep 27, 2026
13Indirect evidenceIstanbul, TürkiyeHQ checked Sep 27, 20261-103 contacts →

Indirect evidence

“Siber Güvenlik alanında 15 yılı aşkın süredir danışmanlık hizmetleri veren iki dostun hayallerinin buluşması sonucu doğan Mernus Bilişim Teknolojileri, müşterilerine bilgi…”

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 evidenceIstanbul, TürkiyeHQ checked Sep 27, 20261-103 contacts →

Indirect evidence

“CyberPort Bilişim iş dünyasına yeni bir bakış açısı hizmet vermeyi hedefleyen bir firmadır.”

Source: RevenueBase Database · checked Sep 27, 2026
16Strong evidenceIstanbul, TürkiyeHQ checked Sep 27, 20261-102 contacts →

Strong evidence

“SMSK Information Technologies is a technology services and IT consulting company that provides in-depth corporate security architecture and field-specific know-how.”

Source: RevenueBase Database · checked Sep 27, 2026
17Indirect evidenceIstanbul, TürkiyeHQ checked Sep 27, 202611-501 contacts →

Indirect evidence

“Alfim Bilişim Danışmanlık ve Güvenlik Hizmetleri yılından beri faaliyette olup, bilişim sektöründe kaliteli hizmet ve uygun maliyet kriterlerini birleştirerek bu noktadaki…”

Source: RevenueBase Database · checked Sep 27, 2026
18Strong evidenceAtasehir, TürkiyeHQ checked Sep 27, 20261-101 contacts →

Strong evidence

“Shoutrange is an API focused consulting company, dedicated to designing, implementing, securing, and managing all aspects of our clients' APIs with an integrator oriented mindset.”

Source: RevenueBase Database · checked Sep 27, 2026

Showing 18 of 66 app security consulting firms based in Türkiye

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App security consulting firms based in Türkiye at a glance

As of Sep 27, 2026
21.3%Verified-email coverage
5.9Average contacts per company
1-10Median size (employees)
48.5%Largest-city concentration · Istanbul
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
38
11-50
26
51-200
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 66 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 app security consulting firms, 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 “app security consulting firms”. 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 app security consulting firms), 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 app security consulting firms, 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, 83 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 app security consulting firms, 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 app security consulting firms are there based in Türkiye?

RevenueBase identified 66 app security consulting firms 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?

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

Which city has the most app security consulting firms?

Istanbul leads with 32 headquartered companies, followed by Ankara (7) and Atasehir (3).

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 83 verified decision-maker contacts tracked across these 66 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.