Company lists · Data refreshed September 2026
Top 25 Sustainable development nonprofits based in Germany
RevenueBase identified 304 sustainable development nonprofits headquartered in Germany as of September 2026 and tracks 2,368 professional contacts across them, including 691 with verified work emails. Berlin is the largest hub.
This list covers sustainable development nonprofits 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.
The 25 largest sustainable development nonprofits based in Germany
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 321 contacts → | ||||
Indirect evidence “The Frankfurt Zoological Society (FZS) was established in 1858 and is an internationally operating conservation organisation based in Frankfurt/Main.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 2 | 272 contacts → | ||||
Indirect evidence “Planet Wild is a global community of people who care deeply about nature and want to help our planet bounce back.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 3 | 211 contacts → | ||||
Strong evidence “The German Institute of Development and Sustainability (IDOS) is a renowned research institute and influential think tank for global sustainable development.| Netiquette…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 4 | 139 contacts → | ||||
Indirect evidence “Acker ist ein gemeinnütziges Sozialunternehmen, das konsequent für eine nachhaltigere Welt arbeitet.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 5 | 69 contacts → | ||||
Indirect evidence “B.A.U.M.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 6 | 49 contacts → | ||||
Indirect evidence “Utopia.de ist die führende Internet-Plattform für nachhaltigen Konsum im deutschsprachigen Raum.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 7 | 45 contacts → | ||||
Indirect evidence “Bauhaus Earth is committed to a future where buildings, cities, and landscapes proactively contribute to climate restoration and have a positive impact on the planet and its…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 8 | 25 contacts → | ||||
Indirect evidence “For more than twenty years, the Global Nature Fund (GNF) has been committed to the protection of nature and the environment.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 9 | 23 contacts → | ||||
Indirect evidence “Seit engagieren wir uns für Natur, Moor- und Klimaschutz und sind heute eine weltweit vernetzte Naturschutzinstitution.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 10 | 22 contacts → | ||||
Indirect evidence “Green City ist der Verein für die Verbesserung der Lebensqualität sowie die nachhaltige Entwicklung und aktive Gestaltung unseres Lebensraums in und um München.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 11 | 21 contacts → | ||||
Indirect evidence “The DO School Fellowships gGmbH is a non-profit organization headquartered in Berlin, Germany.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 12 | 21 contacts → | ||||
Strong evidence “The German Council for Sustainable Development (RNE) was first called into being by the German Federal Government in April 2001.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 13 | 21 contacts → | ||||
Indirect evidence “TUM GreenTech aims to be a thriving community dedicated to a greener tomorrow.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 14 | 20 contacts → | ||||
Strong evidence “A globally recognised non profit think-tank driven by the vision of collective local and global efforts focusing on climate change, sustainable development, biodiversity and…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 15 | 20 contacts → | ||||
Indirect evidence “Als Netzwerk setzt sich BAUM e.V.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 16 | 20 contacts → | ||||
Indirect evidence “Die jahrelange Erfahrung der Gründer*innen im Fundraising für diverse NGOs motivierte sie dazu, selbst grundlegend etwas zu verändern.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 17 | 18 contacts → | ||||
Partial evidence “With our work, we want to contribute to achieving the democratically negotiated sustainability goals and support future societal negotiation processes for the transformation.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 18 | 18 contacts → | ||||
Indirect evidence “Unternehmensverantwortung für Mensch und Natur: „Curated Future“ Im Spektrum zwischen Wirtschaftlichkeit, Ökologie, Kultur und Gemeinnützigkeit lässt sich vieles unternehmen.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 19 | 18 contacts → | ||||
Partial evidence “The German Federal Association for Sustainability was founded on 25 April 2013 and is a German non-governmental organisation (NGO) at national level with the legal form of a…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 20 | 16 contacts → | ||||
Partial evidence “Hot or Cool Institute is a public interest think tank working at the intersection of society and sustainability.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 21 | 16 contacts → | ||||
Indirect evidence “KAYA is a project developer that cares.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 22 | 15 contacts → | ||||
Indirect evidence “Wie setzen uns als Deutsche KlimaStiftung bereits seit 2009 unabhängig und gemeinnützig für Klimabildung und Dialog im In- und Ausland ein.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 23 | 12 contacts → | ||||
Indirect evidence “Die Bodensee-Stiftung ist eine private Umwelt- und Naturschutzorganisation, die sich projektorientiert für mehr Nachhaltigkeit und Naturschutz einsetzt – regional, national und…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 24 | 12 contacts → | ||||
Indirect evidence “Die Hamburger Klimaschutzstiftung ist eine etablierte Akteurin im Bereich der Bildung für nachhaltige Entwicklung (BNE) in der Metropolregion Hamburg, mit einem besonderen Fokus…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 25 | 10 contacts → | ||||
Indirect evidence “We have been helping rural areas to reorganize themselves since 2006 and want to make people aware of their own potential.” Source: RevenueBase Database · checked Sep 22, 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: sustainable development nonprofits. 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 nonprofits.
- Partial evidence
- Its own public description names part of sustainable development nonprofits, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name sustainable development nonprofits. 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 304 sustainable development nonprofits based in Germany
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Sustainable development nonprofits based in Germany at a glance
As of Sep 22, 2026Companies by employee count
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 304 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 nonprofits, 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 nonprofits”. 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 nonprofits), 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 nonprofits, 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, 691 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 nonprofits by metro
- Sustainable development nonprofits in Berlin54
- Sustainable development nonprofits in Hamburg27
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 nonprofits, 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 nonprofits are there based in Germany?
RevenueBase identified 304 sustainable development nonprofits 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?
Frankfurt Zoological Society Zoologische Gesellschaft Frankfurt, headquartered in Frankfurt, tops this list with the largest team on record.
Which city has the most sustainable development nonprofits?
Berlin leads with 54 headquartered companies, followed by Hamburg (27) and Munchen (12).
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 691 verified decision-maker contacts tracked across these 304 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.
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