Company lists · Data refreshed September 2026

Top 25 Sustainable development firms based in Germany

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

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 1,023 companies tracked

RevenueBase identified 1,023 sustainable development firms headquartered in Germany as of September 2026 and tracks 12,799 professional contacts across them, including 4,499 with verified work emails. Berlin is the largest hub.

This list covers sustainable development firms headquartered in Germany, 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

1,023Companies

12,799Contacts tracked

4,499Verified emails

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The 25 largest sustainable development firms based in Germany

Ranked by team size

Top 25 of 1,023 sustainable development firms based in Germany, 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	GFA Consulting Group Gmbh	Partial evidence	Hamburg, GermanyHQ checked Sep 22, 2026	1,001-5,000	1,382 contacts →
	Partial evidence “GFA Consulting Group is one of Europe's leading consulting firms in the field of international development cooperation.” Source: RevenueBase Database · checked Sep 22, 2026
2	Fichtner	Indirect evidence	Stuttgart, GermanyHQ checked Sep 22, 2026	1,001-5,000	1,279 contacts →
	Indirect evidence “As a leading, independent engineering and consultancy enterprise active in the sectors of energy and infrastructure, Fichtner handles challenging projects in countries all over…” Source: RevenueBase Database · checked Sep 22, 2026
3	Gopa Worldwide Consultants	Indirect evidence	Bad Homburg Vor Der Hohe, GermanyHQ checked Sep 22, 2026	n/a	605 contacts →
	Indirect evidence “GOPA Worldwide Consultants is an integral part of GOPA, Europe’s leading professional services provider combining engineering, consulting, and communication.” Source: RevenueBase Database · checked Sep 22, 2026
4	H&z Management Consulting	Partial evidence	München, GermanyHQ checked Sep 22, 2026	501-1,000	285 contacts →
	Partial evidence “Welcome to H&Z We offer more than successful strategy development.” Source: RevenueBase Database · checked Sep 22, 2026
5	GKW Consult	Indirect evidence	Mannheim, GermanyHQ checked Sep 22, 2026	201-500	282 contacts →
	Indirect evidence “GKW Consult GmbH, a company of GFA Group, has developed and implemented projects and advisory services for public and private clients for 70 years in more than 50 countries…” Source: RevenueBase Database · checked Sep 22, 2026
6	Adelphi	Partial evidence	Berlin, GermanyHQ checked Sep 22, 2026	201-500	269 contacts →
	Partial evidence “adelphi consult is a leading independent consultancy specialising in climate, environment and development.” Source: RevenueBase Database · checked Sep 22, 2026
7	Zetcon Ingenieure Gmbh	Indirect evidence	Bochum, GermanyHQ checked Sep 22, 2026	501-1,000	269 contacts →
	Indirect evidence “Von Planung bis Bauüberwachung in großen Infrastruktur-Projekten, von Architektur bis Erneuerbare Energien-ZETCON Ingenieure sind ganz vorne mit dabei in den Bereichen Energie…” Source: RevenueBase Database · checked Sep 22, 2026
8	Dorsch Impact Gmbh	Partial evidence	Essen, GermanyHQ checked Sep 22, 2026	51-200	200 contacts →
	Partial evidence “Dorsch Impact GmbH is an independent and reliable consulting partner for international development cooperation.” Source: RevenueBase Database · checked Sep 22, 2026
9	CES Consulting Engineers Salzgitter Gmbh	Indirect evidence	Braunschweig, GermanyHQ checked Sep 22, 2026	51-200	165 contacts →
	Indirect evidence “CES Consulting Engineers Salzgitter GmbH is an independent consulting engineering company with worldwide experience.” Source: RevenueBase Database · checked Sep 22, 2026
10	Energielenker Gruppe	Indirect evidence	Münster, GermanyHQ checked Sep 22, 2026	201-500	152 contacts →
	Indirect evidence “Wir erschaffen Zukunft – mit erneuerbaren Energien und innovativen Lösungen!” Source: RevenueBase Database · checked Sep 22, 2026
11	IPC	Partial evidence	Frankfurt, GermanyHQ checked Sep 22, 2026	51-200	137 contacts →
	Partial evidence “Founded in 1980, IPC builds on a tremendous track record of successfully implemented projects and strong partnerships around the world with development and donor organizations as…” Source: RevenueBase Database · checked Sep 22, 2026
12	Integration Consulting Group	Indirect evidence	Frankfurt/ Main, GermanyHQ checked Sep 22, 2026	11-50	114 contacts →
	Indirect evidence “INTEGRATION is a consulting organization specialising in project management, with focus on developing countries and emerging markets.” Source: RevenueBase Database · checked Sep 22, 2026
13	BMP	Indirect evidence	Köln, GermanyHQ checked Sep 22, 2026	51-200	101 contacts →
	Indirect evidence “BMP, gegründet 1996, ist ein unabhängiger Dienstleister im Bereich Projektentwicklung, Projektmanagement und Baumanagement mit Hauptsitz in Köln sowie Niederlassungen in Berlin…” Source: RevenueBase Database · checked Sep 22, 2026
14	Icon-Institute Consulting Gruppe	Partial evidence	Koeln, GermanyHQ checked Sep 22, 2026	51-200	101 contacts →
	Partial evidence “What We Do ICON-INSTITUTE Consulting Group closely works with its clients in the implementation of tailor-made and hands-on solutions in the fields of management and development…” Source: RevenueBase Database · checked Sep 22, 2026
15	Unique Land USE Gmbh	Strong evidence	Freiburg, GermanyHQ checked Sep 22, 2026	51-200	99 contacts →
	Strong evidence “Unique is a leading consulting firm for sustainable forestry and agriculture, rural development and natural resource management.” Source: RevenueBase Database · checked Sep 22, 2026
16	ECO Consult Gmbh & Co. KG	Indirect evidence	Oberaula, GermanyHQ checked Sep 22, 2026	51-200	89 contacts →
	Indirect evidence “ECO was founded by Dr.” Source: RevenueBase Database · checked Sep 22, 2026
17	Kodiak Gmbh	Partial evidence	Hamburg, GermanyHQ checked Sep 22, 2026	51-200	88 contacts →
	Partial evidence “KODIAK's SERVICES: PROJECT DEVELOPMENT ADVISORY - Project development and strategic planning - Market advisory - Advisory in technology and location - Project governance and…” Source: RevenueBase Database · checked Sep 22, 2026
18	AHT Group Gmbh	Partial evidence	Essen, GermanyHQ checked Sep 22, 2026	51-200	88 contacts →
	Partial evidence “Dorsch Impact is an independent, experienced and reliable consultant for international development cooperation.” Source: RevenueBase Database · checked Sep 22, 2026
19	Mull UND Partner Ingenieurgesellschaft MBH	Indirect evidence	Hannover, GermanyHQ checked Sep 22, 2026	201-500	83 contacts →
	Indirect evidence “Mit unseren zahlreichen Standorten und Niederlassungen bundesweit bieten wir unseren Kunden alle Leistungen von der Flächenerkundung über Planung und Überwachung von…” Source: RevenueBase Database · checked Sep 22, 2026
20	TILIA	Partial evidence	Leipzig, GermanyHQ checked Sep 22, 2026	51-200	78 contacts →
	Partial evidence “Tilia is a French German services, co-development and consulting firm founded in 2009 by people with broad international experience and a common vision of the future of utilities…” Source: RevenueBase Database · checked Sep 22, 2026
21	Epos Health Management	Indirect evidence	Bad Homburg, GermanyHQ checked Sep 22, 2026	51-200	75 contacts →
	Indirect evidence “EPOS Health Management merged with GOPA Worldwide Consultants GmbH on September 1st, 2020, and ceased operating.” Source: RevenueBase Database · checked Sep 22, 2026
22	Comanos	Indirect evidence	Bremen, GermanyHQ checked Sep 22, 2026	51-200	73 contacts →
	Indirect evidence “Comanos emerged from innovative minds with many years of experience in the areas of temporary employment, interim management and recruitment.” Source: RevenueBase Database · checked Sep 22, 2026
23	Enervis Energy Advisors Gmbh	Indirect evidence	Berlin, GermanyHQ checked Sep 22, 2026	51-200	71 contacts →
	Indirect evidence “enervis is a specialized management consultancy for the energy industry.” Source: RevenueBase Database · checked Sep 22, 2026
24	GFK Ingenieure Gmbh	Indirect evidence	Hannover, GermanyHQ checked Sep 22, 2026	201-500	71 contacts →
	Indirect evidence “Unsere Leistungen sind vielfältig.” Source: RevenueBase Database · checked Sep 22, 2026
25	Vindelici Advisors	Indirect evidence	Augsburg, GermanyHQ checked Sep 22, 2026	11-50	70 contacts →
	Indirect evidence “Vindelici Advisors is a strategic advisory firm and a responsible partner.” 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 1,023 sustainable development firms based in Germany

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Sustainable development firms based in Germany at a glance

As of Sep 22, 2026

35.2%Verified-email coverage

12.5Average contacts per company

1-10Median size (employees)

11.6%Largest-city concentration · Berlin

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

603

11-50

301

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 1,023 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 Germany 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 Germany 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, 4,499 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 Berlin119
Sustainable development firms in Hamburg76
Sustainable development firms in Munchen26

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 Germany?

RevenueBase identified 1,023 sustainable development firms headquartered in Germany 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?

GFA Consulting Group Gmbh, headquartered in Hamburg, tops this list with the largest team on record.

Which city has the most sustainable development firms?

Berlin leads with 119 headquartered companies, followed by Hamburg (76) and Munchen (26).

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 4,499 verified decision-maker contacts tracked across these 1,023 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.