Company lists · Data refreshed September 2026

Top 25 Environmental sustainability consulting firms based in Türkiye

Name: Environmental sustainability consulting firms based in Türkiye
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 674 companies tracked

RevenueBase identified 674 environmental sustainability consulting firms headquartered in Türkiye as of September 2026 and tracks 3,474 professional contacts across them, including 428 with verified work emails. Istanbul is the largest hub.

This list covers environmental sustainability 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 21, 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 21, 2026 86% judged on-target in blind review

674Companies

3,474Contacts tracked

428Verified emails

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The 25 largest environmental sustainability consulting firms based in Türkiye

Ranked by team size

Top 25 of 674 environmental sustainability consulting firms based in Türkiye, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to environmental sustainability 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Çınar Engineering Consultancy INC	Partial evidence	Etimesgut, TürkiyeHQ checked Sep 21, 2026	51-200	72 contacts →
	Partial evidence “The environment is a rising value in the world.” Source: RevenueBase Database · checked Sep 21, 2026
2	BE	Indirect evidence	Ankara, TürkiyeHQ checked Sep 21, 2026	51-200	64 contacts →
	Indirect evidence “be is dedicated to providing sustainable engineering solutions and consultancy services in the fields of Renewables, Oil & Gas.” Source: RevenueBase Database · checked Sep 21, 2026
3	Semtrio	Partial evidence	İstanbul, TürkiyeHQ checked Sep 21, 2026	11-50	55 contacts →
	Partial evidence “Semtrio, the highest-rated B Corp in Türkiye, offers sustainability consultancy on a global scale, aligning corporate strategies with sustainability targets and turning climate…” Source: RevenueBase Database · checked Sep 21, 2026
4	Evreka	Partial evidence	Cankaya, TürkiyeHQ checked Sep 21, 2026	51-200	52 contacts →
	Partial evidence “With its mission to advance the frontiers of sustainability for a better future, Evreka’s 'Sustainability as a Service' approach aims to tackle the biggest obstacles for the…” Source: RevenueBase Database · checked Sep 21, 2026
5	Arge Consulting Arge Danışmanlık	Partial evidence	Beykoz, TürkiyeHQ checked Sep 21, 2026	11-50	44 contacts →
	Partial evidence “ARGE Consulting is a globally recognized Turkish management consulting firm that was founded in 1991.” Source: RevenueBase Database · checked Sep 21, 2026
6	Escarus Tskb Sustainability Consultancy	Partial evidence	Istanbul, TürkiyeHQ checked Sep 21, 2026	11-50	40 contacts →
	Partial evidence “Established in April 2011, ESCARUS is a TSKB group company that provides sustainability solutions to its customers with its professional and experienced team.” Source: RevenueBase Database · checked Sep 21, 2026
7	Genetek	Indirect evidence	Kocaeli, TürkiyeHQ checked Sep 21, 2026	1-10	30 contacts →
	Indirect evidence “GENETEK, danışmanlık hizmetleri özellikle özel uzmanlık gerektiren konularda yoğunlaşmaktadır.” Source: RevenueBase Database · checked Sep 21, 2026
8	Ulus Mühendi̇sli̇k	Indirect evidence	Maltepe, TürkiyeHQ checked Sep 21, 2026	11-50	26 contacts →
	Indirect evidence “Ulus Mühendislik Olarak, ÇEVRE DANIŞMANLIĞI' nda Uzman Mühendis Kadrolarımızla Hizmet Sunmaktayız.” Source: RevenueBase Database · checked Sep 21, 2026
9	S360	Partial evidence	Istanbul, TürkiyeHQ checked Sep 21, 2026	11-50	25 contacts →
	Partial evidence “We are sustainability specialists helping brands and corporates to make better choices.” Source: RevenueBase Database · checked Sep 21, 2026
10	Davinci Energy	Indirect evidence	Ankara, TürkiyeHQ checked Sep 21, 2026	11-50	25 contacts →
	Indirect evidence “RENEWABLE ENERGY SERVICES -Project Management -Project Development -Administrative Process Management -Engineering -Financial Management” Source: RevenueBase Database · checked Sep 21, 2026
11	Proçed Çevre Danışmanlığı Mühendislik İnş. San. VE Tic. Ltd. ŞTI	Indirect evidence	İzmir, TürkiyeHQ checked Sep 21, 2026	11-50	24 contacts →
	Indirect evidence “Proçed Çevre Danışmanlığı Mühendislik İnş.” Source: RevenueBase Database · checked Sep 21, 2026
12	Casem ESG	Strong evidence	Erenler, TürkiyeHQ checked Sep 21, 2026	11-50	24 contacts →
	Strong evidence “CASEM ESG is a consulting company specialized in sustainability with more than 16 years of experience.” Source: RevenueBase Database · checked Sep 21, 2026
13	ETC Çevre Teknolojileri	Indirect evidence	Konutkent Çankaya, TürkiyeHQ checked Sep 21, 2026	11-50	22 contacts →
	Indirect evidence “ETC, 2004 yılında faaliyetlerine başlamış olup çevre danışmanlık, ÇED Raporları, Proje Tanıtım Dosyaları hazırlanması, atıksu arıtma tesisleri yapımı, işletme ve bakım hizmetleri…” Source: RevenueBase Database · checked Sep 21, 2026
14	Ekodenge INC	Indirect evidence	Ankara, TürkiyeHQ checked Sep 21, 2026	11-50	21 contacts →
	Indirect evidence “Ekodenge was founded in 1996 by the experts working in the field since 80s to provide further engineering, consultancy, and architectural services.” Source: RevenueBase Database · checked Sep 21, 2026
15	Eçed Çevre Danışmanlık VE Mühendislik Hizmetleri	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 21, 2026	11-50	21 contacts →
	Indirect evidence “2001 yılında kurucumuz Harun TEKAY Çevre Danışmanlık hizmetlerinde aktif çalışma hayatına başlamıştır.” Source: RevenueBase Database · checked Sep 21, 2026
16	Aqwadem Consulting	Partial evidence	Ankara, TürkiyeHQ checked Sep 21, 2026	11-50	19 contacts →
	Partial evidence “AQWADEM is a Consulting Company offering complete solutions in Project Management, Corporate Management, Financial Management and Engineering fields in Infrastructure…” Source: RevenueBase Database · checked Sep 21, 2026
17	Altensis	Indirect evidence	Atasehir, TürkiyeHQ checked Sep 21, 2026	11-50	18 contacts →
	Indirect evidence “As we face with the uprising and unwanted effects of the global warming, minimizing our carbon dioxide emissions is becoming more and more important each day.” Source: RevenueBase Database · checked Sep 21, 2026
18	Akar-Su Mühendislik VE Müşavirlik Ltd. ŞTI	Indirect evidence	Ankara, TürkiyeHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “TR-AKAR-SU Mühendislik Müşavirlik Ltd.” Source: RevenueBase Database · checked Sep 21, 2026
19	Greenlife Danışmanlık	Indirect evidence	Ankara, TürkiyeHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “Çevre Miras Değil, Gelecek Nesillere Devredilecek Emanettir.” Source: RevenueBase Database · checked Sep 21, 2026
20	Life Climate	Strong evidence	Çankaya, TürkiyeHQ checked Sep 21, 2026	11-50	16 contacts →
	Strong evidence “Life Climate stands as a premier sustainability consultancy firm in Turkiye, dedicated to addressing and mitigating environmental impacts with a strong commitment to comprehensive…” Source: RevenueBase Database · checked Sep 21, 2026
21	GTE Sustainability And Energy Consultancy	Partial evidence	Çankaya, TürkiyeHQ checked Sep 21, 2026	11-50	16 contacts →
	Partial evidence “GTE, based in Ankara, Turkey, is an engineering and consultancy firm with an extensive local expertise and interdisciplinary experience in climate services, sustainability…” Source: RevenueBase Database · checked Sep 21, 2026
22	Erke Sustainability Consultancy	Indirect evidence	Üsküdar, TürkiyeHQ checked Sep 21, 2026	11-50	15 contacts →
	Indirect evidence “ERKE was founded in 2007 to provide electrical project design, lighting, and application consultancy services.” Source: RevenueBase Database · checked Sep 21, 2026
23	2u1k Engineering And Consultancy INC	Indirect evidence	Çankaya, TürkiyeHQ checked Sep 21, 2026	11-50	15 contacts →
	Indirect evidence “2U1K Mühendislik ve Danışmanlık A.Ş, 2012 yılında Turgay Eser (Çevre Mühendisi), Günal Özenirler (Çevre Yüksek Mühendisi) ve Dündar Emre Kaya (Çevre Mühendisi) tarafından…” Source: RevenueBase Database · checked Sep 21, 2026
24	Ençev Enerji̇	Indirect evidence	Ankara, TürkiyeHQ checked Sep 21, 2026	51-200	15 contacts →
	Indirect evidence “EN-ÇEV Enerji Çevre Yatırımları ve Danışmanlığı Haritacılık İmar İnşaat A.Ş.” Source: RevenueBase Database · checked Sep 21, 2026
25	Kıymet-I Harbiye Yönetim Danışmanlık	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 21, 2026	11-50	14 contacts →
	Indirect evidence “Kıymet-i Harbiye, sürdürülebilirlik ve kurumsal sorumluluk yönetimi alanında danışmanlık ve uygulama hizmetleri sunmak amacıyla 2009 yılında kurulmuştur.” Source: RevenueBase Database · checked Sep 21, 2026

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: environmental sustainability 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 environmental sustainability consulting firms.
Partial evidence: Its own public description names part of environmental sustainability consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental sustainability 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 674 environmental sustainability consulting firms based in Türkiye

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Environmental sustainability consulting firms based in Türkiye at a glance

As of Sep 21, 2026

12.3%Verified-email coverage

5.2Average contacts per company

1-10Median size (employees)

19.9%Largest-city concentration · Istanbul

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

469

11-50

173

51-200

201-500

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 674 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 environmental sustainability 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 “environmental sustainability 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 environmental sustainability 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 environmental sustainability 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, 428 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 21, 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.

Environmental sustainability consulting firms by metro

Environmental sustainability consulting firms in Istanbul134
Environmental sustainability consulting firms in Ankara88
Environmental sustainability consulting firms in Cankaya54
Environmental sustainability consulting firms in Izmir38

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 environmental sustainability 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 environmental sustainability consulting firms are there based in Türkiye?

RevenueBase identified 674 environmental sustainability 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?

Çınar Engineering Consultancy INC, headquartered in Baglica, tops this list with the largest team on record.

Which city has the most environmental sustainability consulting firms?

Istanbul leads with 134 headquartered companies, followed by Ankara (88) and Cankaya (54).

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 428 verified decision-maker contacts tracked across these 674 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 21, 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.