Company lists · Data refreshed September 2026

Top 8 Website security companies based in Türkiye

RevenueBase identified 43 website security companies headquartered in Türkiye as of September 2026 and tracks 335 professional contacts across them, including 59 with verified work emails. Istanbul is the largest hub.

This list covers website security 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
43Companies
335Contacts tracked
59Verified emails
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The 8 largest website security companies based in Türkiye

Ranked by team size
Top 8 of 43 website security 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 website security 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
1Partial evidenceIstanbul, TürkiyeHQ checked Sep 14, 202651-200113 contacts →

Partial evidence

“ADEO Cyber Security is a trusted cybersecurity partner enabling organizations to build resilient, proactive, and continuous cyber defense capabilities.”

Source: RevenueBase Database · checked Sep 14, 2026
2Indirect evidenceIstanbul, TürkiyeHQ checked Sep 14, 202651-20054 contacts →

Indirect evidence

“Teknoloji ve inovasyon aracılığıyla, müşterilerimiz, çalışma arkadaşlarımız, iş ortaklarımız ve çevremiz için güvenli bir gelecek inşa etmek için çalışıyoruz!”

Source: RevenueBase Database · checked Sep 14, 2026
3Partial evidenceIstanbul, TürkiyeHQ checked Sep 14, 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 14, 2026
4Indirect evidenceŞişli, TürkiyeHQ checked Sep 14, 20261-1010 contacts →

Indirect evidence

“Digital Forensics and Incident Response”

Source: RevenueBase Database · checked Sep 14, 2026
5Indirect evidenceZonguldak, TürkiyeHQ checked Sep 14, 20261-109 contacts →

Indirect evidence

“Deepreo is a technology company providing integrated solutions in cybersecurity, system monitoring and management, secure software development, and corporate training.”

Source: RevenueBase Database · checked Sep 14, 2026
6Indirect evidenceİstanbul, TürkiyeHQ checked Sep 14, 20261-106 contacts →

Indirect evidence

“Günümüz teknolojisinin geldiği bugün ki durum göz önünde bulundurulduğunda bilgisayar, akıllı telefon, internet ve sosyal medya kullanımı günlük ve iş hayatlarımızın her anına ve…”

Source: RevenueBase Database · checked Sep 14, 2026
7Indirect evidenceMuratpaşa, TürkiyeHQ checked Sep 14, 20261-105 contacts →

Indirect evidence

“Siber güvenlik ve bilişim teknolojileri alanında uzmanlaşmış, yenilikçi ve güvenilir bir teknik destek firmasıyız.”

Source: RevenueBase Database · checked Sep 14, 2026
8Indirect evidenceİstanbul, TürkiyeHQ checked Sep 14, 20261-102 contacts →

Indirect evidence

“Siberte Bilişim ve Danışmanlık Hizmetleri müşterilerine Siber Güvenlik alanında hizmetler sağlamaktadır.”

Source: RevenueBase Database · checked Sep 14, 2026

Showing 8 of 43 website security companies based in Türkiye

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Website security companies based in Türkiye at a glance

As of Sep 14, 2026
17.6%Verified-email coverage
7.8Average contacts per company
1-10Median size (employees)
37.2%Largest-city concentration · Istanbul
Sep 14, 2026Page data refreshed

Companies by employee count

1-10
22
11-50
16
51-200
5

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 43 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 website security 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 “website security 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 website security 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 website security 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, 59 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.

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 website security 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 website security companies are there based in Türkiye?

RevenueBase identified 43 website security 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?

Adeo Cyber Security, headquartered in Atasehir, tops this list with the largest team on record.

Which city has the most website security companies?

Istanbul leads with 16 headquartered companies, followed by Ankara (2) and Atasehir (2).

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 59 verified decision-maker contacts tracked across these 43 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.