Company lists · Data refreshed September 2026

Top 25 Sustainable development firms based in Türkiye

Name: Sustainable development firms based in Türkiye
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 550 companies tracked

RevenueBase identified 550 sustainable development firms headquartered in Türkiye as of September 2026 and tracks 3,933 professional contacts across them, including 521 with verified work emails. Istanbul is the largest hub.

This list covers sustainable development 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 22, 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 22, 2026 86% judged on-target in blind review

550Companies

3,933Contacts tracked

521Verified emails

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The 25 largest sustainable development firms based in Türkiye

Ranked by team size

Top 25 of 550 sustainable development firms based in Türkiye, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable development 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	Entegre Project Management	Partial evidence	Atasehir, TürkiyeHQ checked Sep 22, 2026	51-200	166 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 22, 2026
2	Proplan Project Management And Consultancy	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 22, 2026	51-200	106 contacts →
	Indirect evidence “WHERE THE BIGGEST PROJECTS START AND END In 2005 we formulated our vast experience and future plans into ProPlan Management.” Source: RevenueBase Database · checked Sep 22, 2026
3	Yildirim Energy	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 22, 2026	51-200	93 contacts →
	Indirect evidence “YILDIRIM Group first entered the energy industry in 2010.” Source: RevenueBase Database · checked Sep 22, 2026
4	Kalkedon Enerji VE Mühendislik	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 22, 2026	501-1,000	86 contacts →
	Indirect evidence “Kurucularının uzun yıllar boyunca uluslararasi taahhüt projelerinde edindikleri deneyimleri yeni mecralara farklı bir ses tonuyla anlatmak için kurulan Kalkedon Enerji, Yurtdışı…” Source: RevenueBase Database · checked Sep 22, 2026
5	WYG Türkiye	Indirect evidence	Ankara, TürkiyeHQ checked Sep 22, 2026	51-200	77 contacts →
	Indirect evidence “WYG is an award-winning professional services firm employing over 1,600 people and operating from more than 50 locations across the UK, Europe, Africa, Asia and the Middle East.” Source: RevenueBase Database · checked Sep 22, 2026
6	BE	Partial evidence	Ankara, TürkiyeHQ checked Sep 22, 2026	51-200	64 contacts →
	Partial evidence “be is dedicated to providing sustainable engineering solutions and consultancy services in the fields of Renewables, Oil & Gas.” Source: RevenueBase Database · checked Sep 22, 2026
7	Aldo Enerji	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 22, 2026	201-500	59 contacts →
	Indirect evidence “Operating within the ALDO Group, established in 1969, ALDO Energy began its journey in 2014 with the aim of serving in the solar energy sector by making use of creative and…” Source: RevenueBase Database · checked Sep 22, 2026
8	Semtrio	Partial evidence	İstanbul, TürkiyeHQ checked Sep 22, 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 22, 2026
9	Envesu	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 22, 2026	51-200	48 contacts →
	Indirect evidence “ENVESU is a consulting and project management company offering a wide range of services in the construction industry.” Source: RevenueBase Database · checked Sep 22, 2026
10	Arge Consulting Arge Danışmanlık	Indirect evidence	Beykoz, TürkiyeHQ checked Sep 22, 2026	11-50	44 contacts →
	Indirect evidence “ARGE Consulting is a globally recognized Turkish management consulting firm that was founded in 1991.” Source: RevenueBase Database · checked Sep 22, 2026
11	Escarus Tskb Sustainability Consultancy	Partial evidence	Istanbul, TürkiyeHQ checked Sep 22, 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 22, 2026
12	MITUS	Indirect evidence	Ankara, TürkiyeHQ checked Sep 22, 2026	11-50	36 contacts →
	Indirect evidence “MİTUS, group of companies, with the participation of its founders with more than 15 years of experience in the sector, with the participation of competent people with more than 30…” Source: RevenueBase Database · checked Sep 22, 2026
13	Pratikus Electric Consultancy Energy Project Engineering, Trading Co. LTD	Partial evidence	Yenimahalle, TürkiyeHQ checked Sep 22, 2026	11-50	33 contacts →
	Partial evidence “PratikUs is providing the most appropriate and sustainable pure engineering solutions for the needs of customers since 2008.” Source: RevenueBase Database · checked Sep 22, 2026
14	Genetek	Indirect evidence	Kocaeli, TürkiyeHQ checked Sep 22, 2026	1-10	30 contacts →
	Indirect evidence “GENETEK, danışmanlık hizmetleri özellikle özel uzmanlık gerektiren konularda yoğunlaşmaktadır.” Source: RevenueBase Database · checked Sep 22, 2026
15	Davinci Energy	Partial evidence	Ankara, TürkiyeHQ checked Sep 22, 2026	11-50	25 contacts →
	Partial evidence “RENEWABLE ENERGY SERVICES -Project Management -Project Development -Administrative Process Management -Engineering -Financial Management” Source: RevenueBase Database · checked Sep 22, 2026
16	Proçed Çevre Danışmanlığı Mühendislik İnş. San. VE Tic. Ltd. ŞTI	Indirect evidence	İzmir, TürkiyeHQ checked Sep 22, 2026	11-50	24 contacts →
	Indirect evidence “Proçed Çevre Danışmanlığı Mühendislik İnş.” Source: RevenueBase Database · checked Sep 22, 2026
17	Casem ESG	Partial evidence	Erenler, TürkiyeHQ checked Sep 22, 2026	11-50	24 contacts →
	Partial evidence “CASEM ESG is a consulting company specialized in sustainability with more than 16 years of experience.” Source: RevenueBase Database · checked Sep 22, 2026
18	Eçed Çevre Danışmanlık VE Mühendislik Hizmetleri	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 22, 2026	11-50	21 contacts →
	Indirect evidence “2001 yılında kurucumuz Harun TEKAY Çevre Danışmanlık hizmetlerinde aktif çalışma hayatına başlamıştır.” Source: RevenueBase Database · checked Sep 22, 2026
19	Renevo Energy	Indirect evidence	Ankara, TürkiyeHQ checked Sep 22, 2026	11-50	20 contacts →
	Indirect evidence “Renevo Enerji, yenilenebilir enerji alanında üst düzey mühendislik çözümleri, proje geliştirme ve yönetimi ile danışmanlık hizmeti vermektedir.” Source: RevenueBase Database · checked Sep 22, 2026
20	Green Diamond Enerji̇ A.Ş	Indirect evidence	Ankara, TürkiyeHQ checked Sep 22, 2026	1-10	19 contacts →
	Indirect evidence “Yenilenebilir enerji sektöründe danışmanlık, projelendirme, mühendislik süreçleri, anahtar teslim kurulum ve bakım işlemleri konularında faaliyet gösteren ulusal ve uluslararası…” Source: RevenueBase Database · checked Sep 22, 2026
21	Aqwadem Consulting	Indirect evidence	Ankara, TürkiyeHQ checked Sep 22, 2026	11-50	19 contacts →
	Indirect 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 22, 2026
22	Altensis	Indirect evidence	Atasehir, TürkiyeHQ checked Sep 22, 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 22, 2026
23	Nartus	Indirect evidence	Ankara, TürkiyeHQ checked Sep 22, 2026	11-50	17 contacts →
	Indirect evidence “Nartus is an engineering and consultancy firm that produces analytical, rational and practical solutions for investments in the Energy, Environment and Agriculture sectors, which…” Source: RevenueBase Database · checked Sep 22, 2026
24	Akar-Su Mühendislik VE Müşavirlik Ltd. ŞTI	Indirect evidence	Ankara, TürkiyeHQ checked Sep 22, 2026	11-50	17 contacts →
	Indirect evidence “TR-AKAR-SU Mühendislik Müşavirlik Ltd.” Source: RevenueBase Database · checked Sep 22, 2026
25	Mentek Enerji VE Mühendislik	Indirect evidence	Çankaya, TürkiyeHQ checked Sep 22, 2026	11-50	16 contacts →
	Indirect evidence “MENTEK MÜHENDİSLİK VE ENERJİ DEPOLAMA SİSTEMLERİ TEKNOLOJİLERİ A.Ş.” Source: RevenueBase Database · checked Sep 22, 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: sustainable development 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 sustainable development firms.
Partial evidence: Its own public description names part of sustainable development firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable development 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 550 sustainable development firms based in Türkiye

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Sustainable development firms based in Türkiye at a glance

As of Sep 22, 2026

13.2%Verified-email coverage

7.2Average contacts per company

1-10Median size (employees)

18.2%Largest-city concentration · Istanbul

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

334

11-50

165

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 550 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 sustainable development 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 “sustainable development 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 sustainable development 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 sustainable development 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, 521 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 22, 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.

Sustainable development firms by metro

Sustainable development firms in Istanbul100
Sustainable development firms in Ankara89
Sustainable development firms in Cankaya51

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 sustainable development 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 sustainable development firms are there based in Türkiye?

RevenueBase identified 550 sustainable development 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?

Entegre Project Management, headquartered in Atasehir, tops this list with the largest team on record.

Which city has the most sustainable development firms?

Istanbul leads with 100 headquartered companies, followed by Ankara (89) and Cankaya (51).

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 521 verified decision-maker contacts tracked across these 550 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 22, 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.