Company lists · Data refreshed November 2026

Top 25 Retrofit engineering companies based in Türkiye

RevenueBase identified 867 company matches for retrofit engineering companies associated with Türkiye as of November 2026 and tracks 6,489 professional contacts across them, including 696 with verified work emails. Istanbul is the largest hub.

This list covers company matches for retrofit engineering companies associated with Türkiye, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
867Companies
6,489Contacts tracked
696Verified emails
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The 25 largest retrofit engineering companies based in Türkiye

Ranked by team size
Top 25 of 867 company matches for retrofit engineering companies based in Türkiye, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchAnkara, TürkiyeHQ recorded Nov 6, 202610001+1,130 contacts →

Exact match

“Mapa Group has emerged as a global leader in the engineering and construction industry, now spanning three continents.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchAtasehir, TürkiyeHQ recorded Nov 6, 202651-200203 contacts →

Exact match

“ENTEGRE PROJECT MANAGEMENT is one of the leading Development Consultancy and Project Management Companies in Turkey and provides services to its clients with utmost care of…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchAnkara, TürkiyeHQ recorded Nov 6, 2026201-500198 contacts →

Exact match

“Founded in 1985, Prota Engineering is a pioneering design firm with a global footprint, having executed over projects spanning across 25 countries, having offices in Turkey…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchAnkara, TürkiyeHQ recorded Nov 6, 2026501-1,00091 contacts →

Exact match

“Atak Engineering was founded in 1988.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchIstanbul, TürkiyeHQ recorded Nov 6, 2026201-50087 contacts →

Exact match

“MCA Yapı, 2010 yılında mekanik ve elektrik sistemlerde yüksek kaliteli mühendislik çözümleri sunmak amacıyla kurulmuştur.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchCayirova, TürkiyeHQ recorded Nov 6, 202651-20081 contacts →

Exact match

“At the adventure which has begun in 1978 with steel wall plug production with the leadership of LINK; we are proud of the position of Pipe Hanger and Supporter sector as a founder…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchIstanbul, TürkiyeHQ recorded Nov 6, 202651-20071 contacts →

Exact match

“TIBA is formed in 2005 to serve expanding needs of construction industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchİstanbul, TürkiyeHQ recorded Nov 6, 20261,001-5,00061 contacts →

Exact match

“Green Holding, gelişen teknolojik ihtiyaçları profesyonel bir çerçevede karşılama hedefiyle, 2007 yılında yüzde yüz yerli sermaye ile kurulmuştur.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchİstanbul, TürkiyeHQ recorded Nov 6, 202651-20049 contacts →

Exact match

“Yapıların Kalbindeyiz.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchAtatürk, TürkiyeHQ recorded Nov 6, 202651-20046 contacts →

Exact match

“TE Engineering and Consultancy firm founded in 2015 by 2 civil engineers who has been working as a professional in industrial, commercial and residential buildings for about 17…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchİstanbul, TürkiyeHQ recorded Nov 6, 2026201-50043 contacts →

Exact match

“Founded in 1991 in Istanbul, AYTES Mühendislik has developed in the field of electromechanical engineering in parallel with the construction sector, which is the largest sector in…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchİstanbul, TürkiyeHQ recorded Nov 6, 202651-20039 contacts →

Exact match

“HİZMET ALANLARIMIZ YÜKSEK YAPILAR ENDÜSTRİ VE ENERJİ TESİSLERİ TOPLU KONUTLAR HASTANELER TURİSTİK TESİSLER ve AVM'ler DEPREM GÜVENLİK ANALİZLERİ KENTSEL DÖNÜŞÜM PROJELERİ DİĞER…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchAnkara, TürkiyeHQ recorded Nov 6, 202611-5035 contacts →

Exact match

“AGM Mühendislik 1993 yılında Ankara'da kurulmuştur.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchIstanbul, TürkiyeHQ recorded Nov 6, 202611-5029 contacts →

Exact match

“TEM is a consulting engineering company providing civil, structural engineering, architectural design, infrastructural engineering, mechanical engineering, electrical engineering…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchKüçükbakkalköy Ataşehir, TürkiyeHQ recorded Nov 6, 202611-5026 contacts →

Exact match

“ABOUT - US Architecture and Construction is a way of life for us.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchİstanbul, TürkiyeHQ recorded Nov 6, 202611-5024 contacts →

Exact match

“MARKAS Engineering was established in May 2012 by the founders, who had experience and knowledge more than 20 years in the electrical project and construction sector, in order to…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchAtsşehir, TürkiyeHQ recorded Nov 6, 202651-20023 contacts →

Exact match

“Oğuz Bayazıt Mimarlık, Y.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchİstanbul, TürkiyeHQ recorded Nov 6, 202651-20021 contacts →

Exact match

“Çalık Proje Mühendislik; Enerji, Petrol, Gaz ve Endüstri piyasalarında yer alan çeşitli firmalar – yükleniciler, işverenler ve finans kuruluşlarına 22 yıldır hizmet veren bir…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchÇankaya, TürkiyeHQ recorded Nov 6, 202611-5021 contacts →

Exact match

“Kurulduğu 2008 yılından bugüne, kamu ve özel sektörden müşterilerine özellikle endüstriyel tesis ve prefabrik yapı projelendirme konusunda kapsamlı mühendislik hizmetleri veren…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchBeşiktaş, TürkiyeHQ recorded Nov 6, 202611-5020 contacts →

Exact match

“Büro Statik Mühendislik İnşaat San.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchİstanbul, TürkiyeHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“Modern Muhendislik was established in 2005 by Galip Topönder, who has 25 years of experience in Civil & Structural Engineering.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchBesiktas, TürkiyeHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“Probi is a structural engineering and design consultancy based in İstanbul, founded in 1984 by Fikret Berker.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchKonya, TürkiyeHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“2006 yılında kurulan AKSİYAL MİMARLIK, Mimari ve İç Mimari proje, Statik Proje ve İnşaat Uygulamaları alanlarında faaliyet göstermektedir.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchBornova, TürkiyeHQ recorded Nov 6, 202611-5017 contacts →

Exact match

“Since 2008, we have been with you with our PAL engineering group companies in the fields of energy efficiency increase projects, efficiency-increasing engineering projects in…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchAksaray, TürkiyeHQ recorded Nov 6, 202651-20017 contacts →

Exact match

“1991 yılında açtığı proje çizim bürosu ile ticari faaliyetine başlayan Koçak Mühendislik; Çeyrek asrı aşkın tecrübesi ile elektrik sektöründe faaliyet göstermektedir yılında…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 867 retrofit engineering companies based in Türkiye

See the full list, filter by size, metro and specialty, and access 696 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Retrofit engineering companies based in Türkiye at a glance

As of Nov 6, 2026
10.7%Verified-email coverage
7.5Average contacts per company
1-10Median size (employees)
21.9%Largest-city concentration · Istanbul
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
479
11-50
282
51-200
69
201-500
23
501-1,000
6
1,001-5,000
5
10001+
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 867 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Türkiye whose business descriptions match “retrofit engineering companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 696 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “retrofit engineering companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many retrofit engineering companies are there based in Türkiye?

RevenueBase identified 867 company matches for retrofit engineering companies associated with Türkiye as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Mapa Group tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most retrofit engineering companies?

Istanbul leads with 190 company records, followed by Ankara (83) and Cankaya (39).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 696 professional contacts with verified work emails tracked across these 867 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.