Company lists · Data refreshed September 2026
Top 25 Iso 27001 consulting firms based in Türkiye
RevenueBase identified 145 iso 27001 consulting firms headquartered in Türkiye as of September 2026 and tracks 726 professional contacts across them, including 155 with verified work emails. Istanbul is the largest hub.
This list covers iso 27001 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 28, 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.
The 25 largest iso 27001 consulting firms based in Türkiye
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 93 contacts → | ||||
Indirect evidence “Netsmart, 25 yılı aşkın tecrübesiyle siber güvenlik alanında uzmanlaşmış lider bir danışmanlık şirketidir.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 69 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 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 60 contacts → | ||||
Indirect evidence “BTYÖN; bilgi güvenliği, iş sürekliliği ve bilgi teknolojileri yönetişimi alanlarında danışmanlık, eğitim, analiz ve değerlendirme hizmetleri sunmaktadır.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 42 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 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 21 contacts → | ||||
Indirect evidence “EMA Security, uluslararası geçerliliğe sahip sertifikalı uzman ekibiyle, Türkiye'de siber güvenlik ve bilgi güvenliği alanlarında faaliyet gösteren yenilikçi bir danışmanlık…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 16 contacts → | ||||
Partial evidence “GTI is an Information Security Consulting, Solutions & Training services firm, providing specialized security services.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 11 contacts → | ||||
Indirect evidence “Invento is a leading security solutions provider dedicated to empowering organizations with resilient and scalable information security frameworks.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 11 contacts → | ||||
Indirect evidence “Asrın Global araştırmacı, gelişime ve değişime açık, yenilikçi, faaliyet gösterdiği danışmanlık hizmetleriyle müşterilerine odaklanmış, iletişim kabiliyetini azami seviyede…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 10 contacts → | ||||
Indirect evidence “2001 yılında kurulan Proks Belgelendirme ve Özel Eğitim Hizmetleri Ltd.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 10 contacts → | ||||
Indirect evidence “Sibereum Bilgi Güvenliği ve Danışmanlığı Tic.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 10 contacts → | ||||
Indirect evidence “TRSiber Türkiye’de özellikle KOBİ’ler ve orta büyüklükteki işletmelerin bilgi güvenliği gereksinimlerinin karşılanmasında danışmanlık ve denetim hizmeti vermek üzere Ankara’da…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 7 contacts → | ||||
Indirect evidence “Siber güvenlik alanında Denetim, Danışmanlık ve Uygulama, Eğitim, Adli Bilişim konularında hizmet vermektedir.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 6 contacts → | ||||
Indirect evidence “NETSEC BİLİŞİM ÇÖZÜMLERİ; Deneyimli kadrosuyla bilgi güvenliği sektöründe 2010 yılından bu yana hizmet veren Netsec Bilişim Çözümleri, sektöründe lider konumunda bulunan yerel ve…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 5 contacts → | ||||
Partial evidence “blog.btrisk.com BTRisk provides assurance and consulting services in information security and IT governance.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 4 contacts → | ||||
Indirect evidence “Yönetim Sistemleri Danışmanlığı, Denetim ve Eğitim Hizmetleri Bilgi Güvenliği, İş Sürekliliği, BT Yönetişim, IT Servis ve Yönetimi” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 4 contacts → | ||||
Indirect evidence “Center On Digital is ensuring the information security is critical to the success and continuity of the company.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 4 contacts → | ||||
Partial evidence “ISO Danışmanlıkları | CB DDO BİG Rehberi Uyum Danışmanlığı | GDPR & KVK Kanunu Uyum Danışmanlıkları | DPO Hizmetleri | ERP Danışmanlıkları | Muhasebe ve Finans Yönetim ve Denetim…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 3 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 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 3 contacts → | ||||
Strong evidence “ISO 27001 Bilgi Güvenliği Yönetim Sistemi Danışmanlığı ISO 22301 İş Sürekliliği Yönetim Sistemi Danışmanlığı ISO BT Hizmet Yönetim Sistemi Danışmanlığı Yönetim Sistemleri…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 3 contacts → | ||||
Indirect evidence “We look to our customer request from every angle - technical, time plan, economic and strategic - before presenting you with a solid, cost-effective solution.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 3 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 3 contacts → | ||||
Indirect evidence “DNS Danismanlik is specialized in information security area.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 3 contacts → | ||||
Indirect evidence “Kurumsal organizasyonların bilgi güvenliği risklerini sistematik biçimde yönetmelerine destek oluyoruz.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 3 contacts → | ||||
Partial evidence “NTG Consulting and Training is an Istanbul-based company specializing in occupational health and safety, environment and quality management, through consulting, training and…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 contacts → | ||||
Indirect evidence “HDE, İç Denetim / İç Kontrol, Süreç Danışmanlığı ve Bilişim Teknolojileri alanlarında çözüm ve hizmetler sunan, uzmanlık odaklı butik bir firmadır.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: iso 27001 consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names iso 27001 consulting firms.
- Partial evidence
- Its own public description names part of iso 27001 consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name iso 27001 consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 145 iso 27001 consulting firms based in Türkiye
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Iso 27001 consulting firms based in Türkiye at a glance
As of Sep 28, 2026Companies by employee count
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 145 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 iso 27001 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 “iso 27001 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 iso 27001 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 iso 27001 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, 155 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 28, 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 iso 27001 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 iso 27001 consulting firms are there based in Türkiye?
RevenueBase identified 145 iso 27001 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?
Netsmart, headquartered in Istanbul, tops this list with the largest team on record.
Which city has the most iso 27001 consulting firms?
Istanbul leads with 63 headquartered companies, followed by Ankara (12) and Bursa (7).
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 155 verified decision-maker contacts tracked across these 145 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 28, 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.
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